4I5B

Structure of human MHC class II protein HLA-DR1 carrying an influenza hemagglutinin peptide partially filling the binding groove

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
IMGT Antibody Annotation
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Pharos: Disease Associations

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
D	d4i5bd2	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	C1 set domains (antibody constant domain-like)	Class II MHC alpha chain, C-terminal domain	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
D	d4i5bd1	Alpha and beta proteins (a+b)	MHC antigen-recognition domain	MHC antigen-recognition domain	MHC antigen-recognition domain	Class II MHC alpha chain, N-terminal domain	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
A	d4i5ba2	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	C1 set domains (antibody constant domain-like)	Class II MHC alpha chain, C-terminal domain	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
A	d4i5ba1	Alpha and beta proteins (a+b)	MHC antigen-recognition domain	MHC antigen-recognition domain	MHC antigen-recognition domain	Class II MHC alpha chain, N-terminal domain	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
B	d4i5bb2	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	C1 set domains (antibody constant domain-like)	Class II MHC beta chain, C-terminal domain	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
B	d4i5bb1	Alpha and beta proteins (a+b)	MHC antigen-recognition domain	MHC antigen-recognition domain	MHC antigen-recognition domain	Class II MHC beta chain, N-terminal domain	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
E	d4i5be2	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	C1 set domains (antibody constant domain-like)	Class II MHC beta chain, C-terminal domain	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
E	d4i5be1	Alpha and beta proteins (a+b)	MHC antigen-recognition domain	MHC antigen-recognition domain	MHC antigen-recognition domain	Class II MHC beta chain, N-terminal domain	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
D	SCOP2B Superfamily	MHC antigen-recognition domain	8040455	3000521	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	Immunoglobulin (Ig) domain-like	8054671	3000071	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	MHC antigen-recognition domain	8040455	3000521	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Immunoglobulin (Ig) domain-like	8054671	3000071	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Immunoglobulin (Ig) domain-like	8054703	3000071	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Immunoglobulin (Ig) domain-like	8054705	3000071	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	MHC antigen-recognition domain	8055636	3000521	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	MHC antigen-recognition domain	8034737	3000521	SCOP2B (2022-06-29)
E	SCOP2B Superfamily	Immunoglobulin (Ig) domain-like	8054705	3000071	SCOP2B (2022-06-29)
E	SCOP2B Superfamily	MHC antigen-recognition domain	8034737	3000521	SCOP2B (2022-06-29)
E	SCOP2B Superfamily	MHC antigen-recognition domain	8055636	3000521	SCOP2B (2022-06-29)
E	SCOP2B Superfamily	Immunoglobulin (Ig) domain-like	8054703	3000071	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
D	C1-set_2	e4i5bD1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: C1-set_2	ECOD (1.6)
D	MHC_II_alpha	e4i5bD2	A: a+b two layers	X: MHC antigen-recognition domain (From Topology)	H: MHC antigen-recognition domain (From Topology)	T: MHC antigen-recognition domain	F: MHC_II_alpha	ECOD (1.6)
A	C1-set_2	e4i5bA1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: C1-set_2	ECOD (1.6)
A	MHC_II_alpha	e4i5bA2	A: a+b two layers	X: MHC antigen-recognition domain (From Topology)	H: MHC antigen-recognition domain (From Topology)	T: MHC antigen-recognition domain	F: MHC_II_alpha	ECOD (1.6)
B	C1-set_2	e4i5bB1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: C1-set_2	ECOD (1.6)
B	MHC_II_beta	e4i5bB2	A: a+b two layers	X: MHC antigen-recognition domain (From Topology)	H: MHC antigen-recognition domain (From Topology)	T: MHC antigen-recognition domain	F: MHC_II_beta	ECOD (1.6)
E	C1-set_2	e4i5bE1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: C1-set_2	ECOD (1.6)
E	MHC_II_beta	e4i5bE2	A: a+b two layers	X: MHC antigen-recognition domain (From Topology)	H: MHC antigen-recognition domain (From Topology)	T: MHC antigen-recognition domain	F: MHC_II_beta	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
D	3.10.320.10	Alpha Beta	Roll	Class II Histocompatibility Antigen, M Beta Chain	Chain B, domain 1	CATH (4.3.0)
D	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
A	3.10.320.10	Alpha Beta	Roll	Class II Histocompatibility Antigen, M Beta Chain	Chain B, domain 1	CATH (4.3.0)
A	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
B	3.10.320.10	Alpha Beta	Roll	Class II Histocompatibility Antigen, M Beta Chain	Chain B, domain 1	CATH (4.3.0)
B	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
E	3.10.320.10	Alpha Beta	Roll	Class II Histocompatibility Antigen, M Beta Chain	Chain B, domain 1	CATH (4.3.0)
E	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)

IMGT Antibody Annotation IMGT Database Homepage

Chain	Protein Name	Description	Organism Name	Gene Allele Name(s)	Domain Name(s)	Receptor Type	Receptor Description	Provenance Source
A, D	MH2 HLA-DR1	II-ALPHA	Homo sapiens (human)	HLA-DRA0101, HLA-DRA0102	G-DOMAIN G-ALPHA, C-LIKE-DOMAIN C-LIKE	MH	MH2-ALPHA_BETA	IMGT (202415-0)
B, E	MH2 HLA-DR1	II-BETA	Homo sapiens (human)	HLA-DRB1*0101	G-DOMAIN G-BETA, C-LIKE-DOMAIN C-LIKE	MH	MH2-ALPHA_BETA	IMGT (202415-0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, D	PF07654	Immunoglobulin C1-set domain (C1-set)	Immunoglobulin C1-set domain	-	Domain
A, D	PF00993	Class II histocompatibility antigen, alpha domain (MHC_II_alpha)	Class II histocompatibility antigen, alpha domain	-	Domain
B, E	PF00969	Class II histocompatibility antigen, beta domain (MHC_II_beta)	Class II histocompatibility antigen, beta domain	-	Domain
B, E	PF07654	Immunoglobulin C1-set domain (C1-set)	Immunoglobulin C1-set domain	-	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, D	HLA class II histocompatibility antigen, DR alpha chain	binding antigen binding peptide antigen binding peptide binding protein-containing complex binding MHC protein complex binding MHC class II protein complex binding molecular transducer activity transmembrane signaling receptor activity signaling receptor activity MHC class II receptor activity immune receptor activity polysaccharide binding carbohydrate binding binding antigen binding peptide antigen binding peptide binding protein-containing complex binding MHC protein complex binding MHC class II protein complex binding molecular transducer activity transmembrane signaling receptor activity signaling receptor activity MHC class II receptor activity immune receptor activity polysaccharide binding carbohydrate binding protein binding signaling receptor binding T cell receptor binding	multicellular organismal process regulation of cellular process regulation of alpha-beta T cell activation regulation of leukocyte activation positive regulation of biological process regulation of cell activation positive regulation of leukocyte cell-cell adhesion lymphocyte activation leukocyte cell-cell adhesion leukocyte activation positive regulation of cell-cell adhesion positive regulation of CD4-positive, alpha-beta T cell activation positive regulation of lymphocyte activation positive regulation of cell activation cell adhesion multicellular organismal process regulation of cellular process regulation of alpha-beta T cell activation regulation of leukocyte activation positive regulation of biological process regulation of cell activation positive regulation of leukocyte cell-cell adhesion lymphocyte activation leukocyte cell-cell adhesion leukocyte activation positive regulation of cell-cell adhesion positive regulation of CD4-positive, alpha-beta T cell activation positive regulation of lymphocyte activation positive regulation of cell activation cell adhesion cell-cell adhesion T cell activation CD4-positive, alpha-beta T cell activation positive regulation of leukocyte activation alpha-beta T cell activation regulation of multicellular organismal process regulation of immune system process regulation of cell-cell adhesion positive regulation of immune system process positive regulation of cellular process regulation of biological process positive regulation of T cell activation positive regulation of cell adhesion regulation of cell adhesion cell activation biological regulation regulation of T cell activation positive regulation of alpha-beta T cell activation regulation of CD4-positive, alpha-beta T cell activation immune system process regulation of leukocyte cell-cell adhesion positive regulation of multicellular organismal process cellular process regulation of lymphocyte activation response to stimulus immune response positive regulation of response to stimulus positive regulation of immune response regulation of response to stimulus regulation of immune response antigen processing and presentation antigen processing and presentation of peptide or polysaccharide antigen via MHC class II antigen processing and presentation of endogenous peptide antigen via MHC class II antigen processing and presentation of endogenous peptide antigen antigen processing and presentation of peptide antigen via MHC class II antigen processing and presentation of peptide antigen antigen processing and presentation of endogenous antigen adaptive immune response antigen processing and presentation of exogenous peptide antigen via MHC class II antigen processing and presentation of exogenous peptide antigen antigen processing and presentation of exogenous antigen system process nervous system process cognition peptide antigen assembly with MHC class II protein complex protein-containing complex organization peptide antigen assembly with MHC protein complex MHC class II protein complex assembly cellular component organization cellular component biogenesis cellular component assembly protein-containing complex assembly MHC protein complex assembly cellular component organization or biogenesis dendritic cell antigen processing and presentation myeloid dendritic cell antigen processing and presentation adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains lymphocyte mediated immunity regulation of immune effector process T cell mediated immunity positive regulation of leukocyte mediated immunity positive regulation of adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains positive regulation of lymphocyte mediated immunity regulation of adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains positive regulation of leukocyte mediated cytotoxicity leukocyte mediated immunity positive regulation of immune effector process positive regulation of adaptive immune response regulation of T cell mediated immunity T cell mediated cytotoxicity positive regulation of T cell mediated cytotoxicity regulation of adaptive immune response regulation of leukocyte mediated cytotoxicity leukocyte mediated cytotoxicity immune effector process regulation of leukocyte mediated immunity regulation of T cell mediated cytotoxicity regulation of lymphocyte mediated immunity positive regulation of T cell mediated immunity regulation of cell killing positive regulation of cell killing cell killing regulation of leukocyte differentiation mononuclear cell differentiation regulation of cell differentiation lymphocyte differentiation cell activation involved in immune response CD4-positive, alpha-beta T cell differentiation involved in immune response alpha-beta T cell differentiation involved in immune response regulation of cell development multicellular organism development cell differentiation regulation of T-helper cell differentiation anatomical structure development T cell differentiation developmental process T-helper cell differentiation leukocyte differentiation cellular developmental process regulation of developmental process cell development regulation of CD4-positive, alpha-beta T cell differentiation regulation of alpha-beta T cell differentiation CD4-positive, alpha-beta T cell differentiation regulation of T cell differentiation alpha-beta T cell differentiation T cell activation involved in immune response alpha-beta T cell activation involved in immune response leukocyte activation involved in immune response lymphocyte activation involved in immune response regulation of lymphocyte differentiation regulation of multicellular organismal development hemopoiesis T cell differentiation involved in immune response regulation of hemopoiesis immunological memory formation process positive regulation of T cell differentiation positive regulation of developmental process positive regulation of memory T cell differentiation positive regulation of cell development memory T cell differentiation positive regulation of hemopoiesis positive regulation of cell differentiation regulation of memory T cell differentiation immunological memory process positive regulation of leukocyte differentiation positive regulation of lymphocyte differentiation positive regulation of CD4-positive, alpha-beta T cell differentiation positive regulation of regulatory T cell differentiation regulation of CD4-positive, CD25-positive, alpha-beta regulatory T cell differentiation positive regulation of alpha-beta T cell differentiation positive regulation of CD4-positive, CD25-positive, alpha-beta regulatory T cell differentiation regulation of regulatory T cell differentiation CD4-positive, CD25-positive, alpha-beta regulatory T cell differentiation regulatory T cell differentiation	membrane-bounded organelle intracellular anatomical structure intracellular vesicle intracellular organelle bounding membrane of organelle cytoplasmic vesicle vesicle membrane clathrin-coated vesicle endocytic vesicle membrane coated vesicle vesicle endocytic vesicle clathrin-coated vesicle membrane clathrin-coated endocytic vesicle membrane membrane-bounded organelle intracellular anatomical structure intracellular vesicle intracellular organelle bounding membrane of organelle cytoplasmic vesicle vesicle membrane clathrin-coated vesicle endocytic vesicle membrane coated vesicle vesicle endocytic vesicle clathrin-coated vesicle membrane clathrin-coated endocytic vesicle membrane membrane cellular anatomical entity intracellular membrane-bounded organelle clathrin-coated endocytic vesicle cytoplasmic vesicle membrane coated vesicle membrane organelle cytoplasm organelle membrane extracellular exosome extracellular vesicle extracellular organelle extracellular region extracellular space extracellular membrane-bounded organelle cell surface MHC protein complex cell periphery MHC class II protein complex protein-containing complex plasma membrane protein complex plasma membrane membrane protein complex endosome membrane endosome late endosome membrane endomembrane system late endosome lytic vacuole vacuole lysosome organelle subcompartment lumenal side of endoplasmic reticulum membrane side of membrane lumenal side of membrane endoplasmic reticulum subcompartment nuclear outer membrane-endoplasmic reticulum membrane network endoplasmic reticulum endoplasmic reticulum membrane immunological synapse vacuolar membrane lytic vacuole membrane lysosomal membrane Golgi membrane Golgi apparatus early endosome early endosome membrane autolysosome autolysosome membrane secondary lysosome Golgi apparatus subcompartment trans-Golgi network membrane trans-Golgi network transport vesicle transport vesicle membrane COPII-coated ER to Golgi transport vesicle ER to Golgi transport vesicle membrane
B, E	HLA class II histocompatibility antigen, DRB1-1 beta chain	binding antigen binding peptide antigen binding peptide binding protein-containing complex binding MHC protein complex binding MHC class II protein complex binding polysaccharide binding carbohydrate binding protein binding signaling receptor binding T cell receptor binding molecular transducer activity transmembrane signaling receptor activity binding antigen binding peptide antigen binding peptide binding protein-containing complex binding MHC protein complex binding MHC class II protein complex binding polysaccharide binding carbohydrate binding protein binding signaling receptor binding T cell receptor binding molecular transducer activity transmembrane signaling receptor activity signaling receptor activity MHC class II receptor activity immune receptor activity CD4 receptor binding structural constituent of cytoskeleton structural molecule activity	antigen processing and presentation antigen processing and presentation of endogenous peptide antigen via MHC class II antigen processing and presentation of peptide or polysaccharide antigen via MHC class II immune system process antigen processing and presentation of endogenous peptide antigen antigen processing and presentation of peptide antigen via MHC class II antigen processing and presentation of peptide antigen antigen processing and presentation of endogenous antigen cellular component organization cellular component biogenesis cellular component assembly protein-containing complex organization protein complex oligomerization protein tetramerization antigen processing and presentation antigen processing and presentation of endogenous peptide antigen via MHC class II antigen processing and presentation of peptide or polysaccharide antigen via MHC class II immune system process antigen processing and presentation of endogenous peptide antigen antigen processing and presentation of peptide antigen via MHC class II antigen processing and presentation of peptide antigen antigen processing and presentation of endogenous antigen cellular component organization cellular component biogenesis cellular component assembly protein-containing complex organization protein complex oligomerization protein tetramerization protein-containing complex assembly cellular process cellular component organization or biogenesis biological process involved in interspecies interaction between organisms response to stimulus detection of external biotic stimulus response to other organism response to external stimulus detection of biotic stimulus detection of bacterium response to biotic stimulus detection of stimulus response to bacterium detection of other organism response to external biotic stimulus negative regulation of lymphocyte proliferation multicellular organismal process regulation of cellular process regulation of leukocyte activation negative regulation of biological process regulation of cell activation negative regulation of T cell proliferation negative regulation of cell adhesion negative regulation of leukocyte proliferation T cell activation lymphocyte proliferation regulation of immune system process regulation of leukocyte proliferation regulation of biological process cell population proliferation negative regulation of T cell activation negative regulation of leukocyte cell-cell adhesion regulation of cell population proliferation mononuclear cell proliferation negative regulation of cell-cell adhesion regulation of leukocyte cell-cell adhesion negative regulation of multicellular organismal process negative regulation of leukocyte activation lymphocyte activation negative regulation of lymphocyte activation leukocyte proliferation leukocyte cell-cell adhesion leukocyte activation negative regulation of mononuclear cell proliferation cell adhesion cell-cell adhesion negative regulation of cellular process regulation of multicellular organismal process regulation of cell-cell adhesion T cell proliferation regulation of lymphocyte proliferation negative regulation of cell population proliferation regulation of cell adhesion biological regulation cell activation regulation of T cell activation negative regulation of cell activation regulation of T cell proliferation negative regulation of immune system process regulation of mononuclear cell proliferation regulation of lymphocyte activation positive regulation of phosphorylation regulation of catalytic activity positive regulation of biological process positive regulation of cellular metabolic process regulation of transferase activity positive regulation of phosphate metabolic process positive regulation of metabolic process positive regulation of molecular function regulation of phosphate metabolic process phosphate-containing compound metabolic process phosphorus metabolic process positive regulation of cellular process positive regulation of transferase activity positive regulation of phosphorus metabolic process phosphorylation cellular metabolic process positive regulation of catalytic activity regulation of cellular metabolic process regulation of molecular function positive regulation of kinase activity regulation of kinase activity regulation of phosphorylation regulation of phosphorus metabolic process metabolic process regulation of metabolic process defense response immune response response to stress inflammatory response inflammatory response to antigenic stimulus myeloid leukocyte differentiation regulation of leukocyte differentiation positive regulation of monocyte differentiation cellular developmental process regulation of developmental process cell development regulation of cell differentiation mononuclear cell differentiation regulation of cell development positive regulation of developmental process multicellular organism development positive regulation of cell differentiation positive regulation of hemopoiesis cell differentiation anatomical structure development monocyte differentiation positive regulation of immune system process developmental process regulation of multicellular organismal development regulation of monocyte differentiation hemopoiesis regulation of myeloid cell differentiation positive regulation of cell development regulation of myeloid leukocyte differentiation positive regulation of myeloid leukocyte differentiation myeloid cell differentiation positive regulation of myeloid cell differentiation regulation of hemopoiesis positive regulation of multicellular organismal process positive regulation of leukocyte differentiation leukocyte differentiation regulation of defense response regulation of response to external stimulus negative regulation of inflammatory response regulation of response to stress negative regulation of inflammatory response to antigenic stimulus negative regulation of response to stimulus negative regulation of immune response regulation of inflammatory response to antigenic stimulus regulation of inflammatory response regulation of response to stimulus negative regulation of response to external stimulus negative regulation of defense response regulation of immune response regulation of type II interferon production type II interferon production cellular biosynthetic process negative regulation of cellular metabolic process organic substance metabolic process cytokine production organic substance biosynthetic process regulation of cytokine production negative regulation of type II interferon production negative regulation of macromolecule metabolic process regulation of biosynthetic process negative regulation of metabolic process negative regulation of cytokine production regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process negative regulation of cellular biosynthetic process regulation of cellular biosynthetic process regulation of gene expression negative regulation of gene expression biosynthetic process negative regulation of biosynthetic process negative regulation of macromolecule biosynthetic process regulation of macromolecule biosynthetic process macromolecule metabolic process regulation of interleukin-4 production interleukin-4 production positive regulation of viral life cycle positive regulation of viral process viral life cycle modulation by symbiont of entry into host biological process involved in interaction with host biological process involved in symbiotic interaction regulation of viral entry into host cell regulation of viral life cycle regulation of viral process symbiont entry into host cell viral process symbiont entry into host positive regulation of viral entry into host cell positive regulation by symbiont of entry into host regulation of biological process involved in symbiotic interaction adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains lymphocyte mediated immunity regulation of immune effector process T cell mediated immunity positive regulation of leukocyte mediated immunity positive regulation of adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains positive regulation of lymphocyte mediated immunity positive regulation of response to stimulus regulation of adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains positive regulation of immune response positive regulation of leukocyte mediated cytotoxicity leukocyte mediated immunity positive regulation of immune effector process positive regulation of adaptive immune response regulation of T cell mediated immunity T cell mediated cytotoxicity positive regulation of T cell mediated cytotoxicity regulation of adaptive immune response regulation of leukocyte mediated cytotoxicity leukocyte mediated cytotoxicity adaptive immune response immune effector process regulation of leukocyte mediated immunity regulation of T cell mediated cytotoxicity regulation of lymphocyte mediated immunity positive regulation of T cell mediated immunity regulation of cell killing positive regulation of cell killing cell killing regulation of alpha-beta T cell activation lymphocyte differentiation positive regulation of T cell differentiation positive regulation of cell activation positive regulation of leukocyte activation alpha-beta T cell activation T cell differentiation positive regulation of T cell activation positive regulation of CD4-positive, alpha-beta T cell differentiation positive regulation of regulatory T cell differentiation positive regulation of alpha-beta T cell activation regulation of CD4-positive, CD25-positive, alpha-beta regulatory T cell differentiation positive regulation of alpha-beta T cell differentiation positive regulation of leukocyte cell-cell adhesion regulation of CD4-positive, alpha-beta T cell differentiation regulation of alpha-beta T cell differentiation CD4-positive, alpha-beta T cell differentiation positive regulation of cell-cell adhesion regulation of T cell differentiation positive regulation of lymphocyte activation positive regulation of CD4-positive, alpha-beta T cell activation alpha-beta T cell differentiation CD4-positive, alpha-beta T cell activation regulation of lymphocyte differentiation positive regulation of CD4-positive, CD25-positive, alpha-beta regulatory T cell differentiation positive regulation of cell adhesion regulation of regulatory T cell differentiation CD4-positive, CD25-positive, alpha-beta regulatory T cell differentiation regulation of CD4-positive, alpha-beta T cell activation regulatory T cell differentiation positive regulation of lymphocyte differentiation cellular response to stimulus positive regulation of cell communication positive regulation of signal transduction positive regulation of canonical NF-kappaB signal transduction signaling regulation of signal transduction intracellular signal transduction cell communication regulation of intracellular signal transduction intracellular signaling cassette signal transduction regulation of signaling positive regulation of intracellular signal transduction canonical NF-kappaB signal transduction regulation of cell communication regulation of canonical NF-kappaB signal transduction positive regulation of signaling immune response-regulating cell surface receptor signaling pathway immune response-activating signaling pathway immune response-regulating signaling pathway cell surface receptor signaling pathway immune response-activating cell surface receptor signaling pathway T cell receptor signaling pathway antigen receptor-mediated signaling pathway activation of immune response positive regulation of ERK1 and ERK2 cascade positive regulation of MAPK cascade regulation of MAPK cascade MAPK cascade ERK1 and ERK2 cascade regulation of ERK1 and ERK2 cascade humoral immune response epidermis development tissue development antigen processing and presentation of exogenous peptide antigen via MHC class II antigen processing and presentation of exogenous peptide antigen antigen processing and presentation of exogenous antigen interleukin-10 production regulation of interleukin-10 production peptide antigen assembly with MHC class II protein complex peptide antigen assembly with MHC protein complex MHC class II protein complex assembly MHC protein complex assembly protein localization regulation of localization establishment of protein localization response to organic substance nitrogen compound transport positive regulation of establishment of protein localization localization carbohydrate homeostasis cellular macromolecule localization establishment of localization in cell positive regulation of insulin secretion involved in cellular response to glucose stimulus positive regulation of insulin secretion regulation of biological quality regulation of peptide hormone secretion regulation of hormone levels organic substance transport positive regulation of peptide hormone secretion establishment of protein localization to extracellular region intracellular glucose homeostasis protein secretion establishment of localization cellular response to oxygen-containing compound regulation of protein secretion regulation of secretion cellular response to carbohydrate stimulus chemical homeostasis response to glucose response to chemical glucose homeostasis positive regulation of protein localization insulin secretion involved in cellular response to glucose stimulus cellular localization regulation of hormone secretion regulation of protein localization regulation of peptide secretion transport homeostatic process positive regulation of secretion by cell hormone secretion protein localization to extracellular region positive regulation of protein transport peptide secretion secretion by cell regulation of secretion by cell positive regulation of hormone secretion response to monosaccharide response to carbohydrate positive regulation of secretion amide transport signal release cellular response to hexose stimulus intracellular chemical homeostasis cellular response to monosaccharide stimulus cellular response to organic substance positive regulation of peptide secretion secretion regulation of transport regulation of peptide transport regulation of establishment of protein localization cell-cell signaling export from cell response to oxygen-containing compound cellular response to glucose stimulus regulation of protein transport positive regulation of protein secretion peptide transport response to hexose cellular response to chemical stimulus cellular homeostasis positive regulation of transport protein transport regulation of cellular localization regulation of insulin secretion peptide hormone secretion macromolecule localization regulation of insulin secretion involved in cellular response to glucose stimulus hormone transport insulin secretion macrophage differentiation regulation of response to biotic stimulus positive regulation of response to biotic stimulus immune response to tumor cell regulation of response to tumor cell T cell mediated immune response to tumor cell regulation of T cell mediated immune response to tumor cell response to tumor cell positive regulation of immune response to tumor cell regulation of immune response to tumor cell positive regulation of T cell mediated immune response to tumor cell positive regulation of response to tumor cell T-helper 1 type immune response positive regulation of macromolecule biosynthetic process regulation of primary metabolic process nucleobase-containing compound metabolic process DNA-templated transcription regulation of RNA metabolic process positive regulation of macromolecule metabolic process regulation of nucleobase-containing compound metabolic process positive regulation of nucleobase-containing compound metabolic process primary metabolic process positive regulation of RNA metabolic process organic cyclic compound metabolic process organic cyclic compound biosynthetic process regulation of DNA-templated transcription positive regulation of DNA-templated transcription RNA metabolic process RNA biosynthetic process nucleic acid biosynthetic process positive regulation of biosynthetic process regulation of RNA biosynthetic process nucleobase-containing compound biosynthetic process nucleic acid metabolic process positive regulation of RNA biosynthetic process positive regulation of cellular biosynthetic process dendritic cell antigen processing and presentation myeloid dendritic cell antigen processing and presentation regulation of protein modification process regulation of protein phosphorylation positive regulation of protein metabolic process positive regulation of protein modification process protein metabolic process positive regulation of protein phosphorylation protein modification process organonitrogen compound metabolic process protein phosphorylation regulation of protein metabolic process macromolecule modification cell activation involved in immune response CD4-positive, alpha-beta T cell differentiation involved in immune response alpha-beta T cell differentiation involved in immune response regulation of T-helper cell differentiation T-helper cell differentiation T cell activation involved in immune response alpha-beta T cell activation involved in immune response leukocyte activation involved in immune response lymphocyte activation involved in immune response T cell differentiation involved in immune response immunological memory formation process positive regulation of memory T cell differentiation memory T cell differentiation regulation of memory T cell differentiation immunological memory process	cell periphery cell surface membrane plasma membrane cellular anatomical entity external side of plasma membrane side of membrane membrane-bounded organelle intracellular anatomical structure intracellular vesicle intracellular organelle bounding membrane of organelle cytoplasmic vesicle vesicle membrane cell periphery cell surface membrane plasma membrane cellular anatomical entity external side of plasma membrane side of membrane membrane-bounded organelle intracellular anatomical structure intracellular vesicle intracellular organelle bounding membrane of organelle cytoplasmic vesicle vesicle membrane clathrin-coated vesicle endocytic vesicle membrane coated vesicle vesicle endocytic vesicle clathrin-coated vesicle membrane clathrin-coated endocytic vesicle membrane intracellular membrane-bounded organelle clathrin-coated endocytic vesicle cytoplasmic vesicle membrane coated vesicle membrane organelle cytoplasm organelle membrane extracellular exosome extracellular vesicle extracellular organelle extracellular region extracellular space extracellular membrane-bounded organelle endosome membrane endosome late endosome membrane endomembrane system late endosome vacuolar membrane lytic vacuole vacuole lytic vacuole membrane lysosomal membrane lysosome Golgi membrane Golgi apparatus transport vesicle transport vesicle membrane polymeric cytoskeletal fiber intermediate filament cytoskeleton cytoskeleton intracellular non-membrane-bounded organelle intermediate filament supramolecular fiber supramolecular polymer supramolecular complex non-membrane-bounded organelle MHC protein complex MHC class II protein complex protein-containing complex plasma membrane protein complex membrane protein complex organelle subcompartment lumenal side of endoplasmic reticulum membrane lumenal side of membrane endoplasmic reticulum subcompartment nuclear outer membrane-endoplasmic reticulum membrane network endoplasmic reticulum endoplasmic reticulum membrane immunological synapse autolysosome autolysosome membrane secondary lysosome Golgi apparatus subcompartment trans-Golgi network membrane trans-Golgi network COPII-coated ER to Golgi transport vesicle ER to Golgi transport vesicle membrane
C, F	truncated hemagglutinin peptide	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, D	IPR036179	Immunoglobulin-like domain superfamily	Homologous Superfamily
A, D	IPR003597	Immunoglobulin C1-set	Domain
A, D	IPR011162	MHC classes I/II-like antigen recognition protein	Homologous Superfamily
A, D	IPR003006	Immunoglobulin/major histocompatibility complex, conserved site	Conserved Site
A, D	IPR014745	MHC class II, alpha/beta chain, N-terminal	Homologous Superfamily
A, D	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
A, D	IPR007110	Immunoglobulin-like domain	Domain
A, D	IPR001003	MHC class II, alpha chain, N-terminal	Domain
B, E	IPR036179	Immunoglobulin-like domain superfamily	Homologous Superfamily
B, E	IPR011162	MHC classes I/II-like antigen recognition protein	Homologous Superfamily
B, E	IPR003006	Immunoglobulin/major histocompatibility complex, conserved site	Conserved Site
B, E	IPR014745	MHC class II, alpha/beta chain, N-terminal	Homologous Superfamily
B, E	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
B, E	IPR007110	Immunoglobulin-like domain	Domain
B, E	IPR003597	Immunoglobulin C1-set	Domain
B, E	IPR000353	MHC class II, beta chain, N-terminal	Domain

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A, D	Pharos: P01903	lung carcinoma toxic shock syndrome multiple sclerosis juvenile dermatomyositis systemic sclerosis ulcerative colitis Parkinson disease Sjogren syndrome Crohn disease pancreatic ductal adenocarcinoma Graham Little Piccardi Lassueur syndrome pilocytic astrocytoma Hashimoto thyroiditis psoriatic arthritis Hodgkins lymphoma lung carcinoma toxic shock syndrome multiple sclerosis juvenile dermatomyositis systemic sclerosis ulcerative colitis Parkinson disease Sjogren syndrome Crohn disease pancreatic ductal adenocarcinoma Graham Little Piccardi Lassueur syndrome pilocytic astrocytoma Hashimoto thyroiditis psoriatic arthritis Hodgkins lymphoma invasive ductal breast carcinoma skin basal cell carcinoma limb-girdle muscular dystrophy systemic lupus erythematosus adrenal cortex carcinoma astrocytic tumor malignant glioma Becker muscular dystrophy celiac disease neoplasm of mature B-cells dermatomyositis non-alcoholic fatty liver disease Down syndrome osteoporosis esophageal adenocarcinoma pancreatic intraductal papillary-mucinous carcinoma Graham Little-Piccardi-Lassueur syndrome primary biliary cholangitis head and neck cancer IgA glomerulonephritis squamous cell lung carcinoma lung adenocarcinoma lymphoplasmacytic lymphoma atopic eczema marginal zone lymphoma breast cancer chronic obstructive pulmonary disease nephrotic syndrome diabetes mellitus non-small cell lung carcinoma Duchenne muscular dystrophy ovarian cancer glioblastoma Graves disease prostate carcinoma heart disease interstitial cystitis juvenile idiopathic arthritis subependymal giant cell astrocytoma lung cancer temporal arteritis alopecia areata malignant ependymoma vitiligo autism spectrum disorder membranous glomerulonephritis breast carcinoma myasthenia gravis nodular sclerosis classical Hodgkin lymphoma diffuse scleroderma osteoarthritis
B, E	Pharos: P01911	Crohn disease narcolepsy rheumatoid arthritis sarcoidosis ulcerative colitis juvenile idiopathic arthritis nephrotic syndrome membranous glomerulonephritis psoriatic arthritis Hashimoto thyroiditis asthma pancreatitis follicular lymphoma chronic beryllium disease multiple sclerosis Crohn disease narcolepsy rheumatoid arthritis sarcoidosis ulcerative colitis juvenile idiopathic arthritis nephrotic syndrome membranous glomerulonephritis psoriatic arthritis Hashimoto thyroiditis asthma pancreatitis follicular lymphoma chronic beryllium disease multiple sclerosis angioedema type 1 diabetes mellitus oropharynx cancer eosinophilia-myalgia syndrome systemic lupus erythematosus typhoid fever visceral leishmaniasis alopecia areata lung carcinoma allergic disease urticaria limited scleroderma proteinuria Graves disease schizophrenia narcolepsy-cataplexy syndrome drug allergy bullous pemphigoid Lymphoma, Intermediate-Grade cerebrovascular disorder reticulum cell sarcoma hepatitis B virus infection metabolic syndrome X colorectal adenoma multiple sclerosis, susceptibility to 1 sinusitis acquired metabolic disease squamous cell carcinoma hypothyroidism nasal cavity disease diabetes mellitus temporal arteritis IgA glomerulonephritis neoplasm of oropharynx autism spectrum disorder nodular sclerosis classical Hodgkin lymphoma diffuse scleroderma vitiligo B-cell chronic lymphocytic leukemia oral cavity cancer bipolar disorder endogenous depression lymphoma C1 inhibitor deficiency primary biliary cholangitis eosinophilic granulomatosis with polyangiitis cervical cancer head and neck cancer lymphosarcoma hepatitis C virus infection colorectal cancer sarcoidosis, susceptibility to, 1 hepatocellular carcinoma myasthenia gravis Crohn's colitis Sjogren syndrome Hodgkins lymphoma narcolepsy without cataplexy cutaneous lupus erythematosus squamous cell lung carcinoma systemic sclerosis idiopathic membranous glomerulonephritis nasopharyngeal disease ileocolitis atopic eczema diffuse cutaneous systemic sclerosis non-alcoholic fatty liver disease pemphigus vulgaris celiac disease esophageal adenocarcinoma head and neck squamous cell carcinoma chronic obstructive pulmonary disease rosacea CREST syndrome myositis skin basal cell carcinoma allergic rhinitis demyelinating disease Takayasu arteritis idiopathic pulmonary fibrosis arthritic joint disease neoplasm of mature B-cells inflammatory bowel disease autism neuromyelitis optica leprosy autoimmune disease non-Hodgkin lymphoma osteoporosis drug-induced liver injury Lyme disease peripheral arterial disease

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.