1Q68

Solution structure of T-cell surface glycoprotein CD4 and Proto-oncogene tyrosine-protein kinase LCK fragments

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
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)
A	d1q68a_	Peptides	CD4 and CD8 receptor regions	CD4 and CD8 receptor regions	CD4 and CD8 receptor regions	T-cell surface glycoprotein CD4	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
B	d1q68b_	Peptides	Proto-oncogene tyrosine-protein kinase lck CD4/CD8 interacting region	Proto-oncogene tyrosine-protein kinase lck CD4/CD8 interacting region	Proto-oncogene tyrosine-protein kinase lck CD4/CD8 interacting region	Proto-oncogene tyrosine-protein kinase lck CD4/CD8 interacting region	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF12104	T cell CD4 receptor C terminal region (Tcell_CD4_C)	T cell CD4 receptor C terminal region	This domain is the C terminal domain of the CD4 T cell receptor. The C terminal domain is the cytoplasmic domain which relays the signal for T cell activation. This process involves co-receptor internalisation. This domain is involved in binding to t ...	This domain is the C terminal domain of the CD4 T cell receptor. The C terminal domain is the cytoplasmic domain which relays the signal for T cell activation. This process involves co-receptor internalisation. This domain is involved in binding to the N terminal of Lck co-receptor in a Zn2+ clasp structure.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	T-cell surface glycoprotein CD4	molecular transducer activity coreceptor activity signaling receptor activity protein-containing complex binding binding MHC protein complex binding MHC class II protein complex binding interleukin-16 binding protein binding cytokine binding protein tyrosine kinase binding kinase binding enzyme binding protein kinase binding molecular transducer activity coreceptor activity signaling receptor activity protein-containing complex binding binding MHC protein complex binding MHC class II protein complex binding interleukin-16 binding protein binding cytokine binding protein tyrosine kinase binding kinase binding enzyme binding protein kinase binding identical protein binding transmembrane signaling receptor activity virus receptor activity exogenous protein binding signaling receptor binding MHC class II protein binding MHC protein binding interleukin-16 receptor activity cytokine receptor activity immune receptor activity structural molecule activity extracellular matrix structural constituent protein homodimerization activity protein dimerization activity lipid binding cation binding transition metal ion binding zinc ion binding ion binding metal ion binding small molecule binding	cellular response to stimulus positive regulation of cell communication regulation of cellular process positive regulation of signal transduction response to stimulus signaling positive regulation of biological process regulation of signal transduction intracellular signal transduction cell communication positive regulation of response to stimulus regulation of intracellular signal transduction intracellular signaling cassette regulation of calcium-mediated signaling cellular response to stimulus positive regulation of cell communication regulation of cellular process positive regulation of signal transduction response to stimulus signaling positive regulation of biological process regulation of signal transduction intracellular signal transduction cell communication positive regulation of response to stimulus regulation of intracellular signal transduction intracellular signaling cassette regulation of calcium-mediated signaling positive regulation of calcium-mediated signaling signal transduction positive regulation of cellular process regulation of biological process regulation of signaling biological regulation positive regulation of intracellular signal transduction regulation of response to stimulus calcium-mediated signaling regulation of cell communication cellular process positive regulation of signaling maintenance of protein location protein localization localization cellular localization maintenance of protein location in cell cellular macromolecule localization macromolecule localization maintenance of location maintenance of location in cell immune response immune system process adaptive immune response regulation of calcium ion transport regulation of localization transport regulation of transport regulation of monoatomic ion transport establishment of localization metal ion transport calcium ion transport monoatomic ion transport regulation of metal ion transport monoatomic cation transport positive regulation of phosphorylation regulation of catalytic activity 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 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 developmental process multicellular organismal process cellular developmental process hemopoiesis cell activation cell development mononuclear cell differentiation lymphocyte activation lymphocyte differentiation leukocyte activation T cell activation cell differentiation anatomical structure development T cell differentiation leukocyte differentiation interleukin-15-mediated signaling pathway response to organic substance cell surface receptor signaling pathway response to cytokine cellular response to interleukin-15 cytokine-mediated signaling pathway cellular response to chemical stimulus response to chemical cellular response to cytokine stimulus cellular response to organic substance response to interleukin-15 regulation of leukocyte activation regulation of cell activation regulation of T cell activation regulation of multicellular organismal process regulation of immune system process regulation of lymphocyte activation myeloid leukocyte differentiation regulation of leukocyte differentiation positive regulation of monocyte differentiation regulation of developmental process regulation of cell differentiation regulation of cell development positive regulation of developmental process multicellular organism development positive regulation of cell differentiation positive regulation of hemopoiesis monocyte differentiation positive regulation of immune system process regulation of multicellular organismal development regulation of monocyte differentiation 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 cell adhesion biological process involved in interspecies interaction between organisms response to other organism defense response response to external stimulus defense response to Gram-negative bacterium response to biotic stimulus defense response to bacterium defense response to other organism response to stress response to bacterium response to external biotic stimulus regulation of primary metabolic process positive regulation of macromolecule metabolic process protein modification process positive regulation of protein phosphorylation protein phosphorylation regulation of protein metabolic process primary metabolic process macromolecule modification macromolecule metabolic process regulation of protein modification process regulation of protein phosphorylation positive regulation of protein metabolic process positive regulation of protein modification process organic substance metabolic process protein metabolic process positive regulation of protein kinase activity organonitrogen compound metabolic process regulation of protein kinase activity regulation of macromolecule metabolic process 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 helper T cell enhancement of adaptive immune response positive regulation of adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains regulation of adaptive immune response regulation of adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains positive regulation of immune response regulation of immune response positive regulation of adaptive immune response positive regulation of canonical NF-kappaB signal transduction canonical NF-kappaB signal transduction regulation of canonical NF-kappaB signal transduction 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 T cell selection response to granulocyte macrophage colony-stimulating factor cellular response to granulocyte macrophage colony-stimulating factor stimulus macrophage differentiation cellular biosynthetic process positive regulation of macromolecule biosynthetic process positive regulation of biosynthetic process regulation of cytokine production organic substance biosynthetic process cytokine production regulation of biosynthetic process regulation of interleukin-2 production interleukin-2 production gene expression macromolecule biosynthetic process positive regulation of interleukin-2 production regulation of cellular biosynthetic process regulation of gene expression biosynthetic process positive regulation of gene expression regulation of macromolecule biosynthetic process positive regulation of cytokine production positive regulation of cellular biosynthetic process nucleobase-containing compound metabolic process DNA-templated transcription regulation of RNA metabolic process regulation of nucleobase-containing compound metabolic process positive regulation of nucleobase-containing compound 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 regulation of RNA biosynthetic process nucleobase-containing compound biosynthetic process nucleic acid metabolic process positive regulation of RNA biosynthetic process enzyme-linked receptor protein signaling pathway positive regulation of leukocyte cell-cell adhesion leukocyte cell-cell adhesion positive regulation of cell-cell adhesion positive regulation of lymphocyte activation positive regulation of cell activation cell-cell adhesion positive regulation of leukocyte activation regulation of cell-cell adhesion positive regulation of T cell activation positive regulation of cell adhesion regulation of cell adhesion regulation of leukocyte cell-cell adhesion cell surface receptor protein tyrosine kinase signaling pathway peptidyl-tyrosine modification positive regulation of peptidyl-tyrosine phosphorylation peptidyl-amino acid modification regulation of peptidyl-tyrosine phosphorylation peptidyl-tyrosine phosphorylation	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 membrane-enclosed lumen endomembrane system intracellular organelle lumen endoplasmic reticulum lumen organelle lumen endoplasmic reticulum protein-containing complex plasma membrane protein complex plasma membrane signaling receptor complex membrane protein complex T cell receptor complex receptor complex membrane microdomain membrane raft organelle subcompartment endoplasmic reticulum subcompartment nuclear outer membrane-endoplasmic reticulum membrane network endoplasmic reticulum membrane early endosome endosome
B	Proto-oncogene tyrosine-protein kinase LCK	phosphoric ester hydrolase activity phosphoprotein phosphatase activity protein serine/threonine phosphatase activity catalytic activity, acting on a protein hydrolase activity, acting on ester bonds phosphatase activity hydrolase activity catalytic activity phosphatidylinositol 3-kinase binding protein binding binding phosphoprotein binding phosphotyrosine residue binding protein phosphorylated amino acid binding phosphoric ester hydrolase activity phosphoprotein phosphatase activity protein serine/threonine phosphatase activity catalytic activity, acting on a protein hydrolase activity, acting on ester bonds phosphatase activity hydrolase activity catalytic activity phosphatidylinositol 3-kinase binding protein binding binding phosphoprotein binding phosphotyrosine residue binding protein phosphorylated amino acid binding protein phosphatase binding phosphatase binding enzyme binding protein tyrosine kinase activity kinase activity protein kinase activity transferase activity phosphotransferase activity, alcohol group as acceptor transferase activity, transferring phosphorus-containing groups adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding organic cyclic compound binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding small molecule binding non-membrane spanning protein tyrosine kinase activity protein-containing complex binding signaling receptor binding T cell receptor binding ATPase binding identical protein binding phospholipase binding CD8 receptor binding SH2 domain binding protein domain specific binding CD4 receptor binding kinase binding protein kinase binding enzyme regulator activity enzyme activator activity molecular function activator activity phospholipase activator activity molecular function regulator activity lipase activator activity	response to stimulus response to chemical response to xenobiotic stimulus organonitrogen compound metabolic process protein phosphorylation protein autophosphorylation phosphorylation cellular metabolic process primary metabolic process peptidyl-tyrosine modification peptidyl-tyrosine autophosphorylation organic substance metabolic process macromolecule modification peptidyl-amino acid modification response to stimulus response to chemical response to xenobiotic stimulus organonitrogen compound metabolic process protein phosphorylation protein autophosphorylation phosphorylation cellular metabolic process primary metabolic process peptidyl-tyrosine modification peptidyl-tyrosine autophosphorylation organic substance metabolic process macromolecule modification peptidyl-amino acid modification phosphate-containing compound metabolic process metabolic process cellular process protein metabolic process macromolecule metabolic process peptidyl-tyrosine phosphorylation protein modification process phosphorus metabolic process biological process involved in interspecies interaction between organisms immune response response to other organism defense response defense response to symbiont response to external stimulus response to biotic stimulus immune system process defense response to other organism response to stress innate immune response response to external biotic stimulus developmental process cellular developmental process hemopoiesis cell differentiation anatomical structure development cell development multicellular organismal process cell activation mononuclear cell differentiation lymphocyte activation lymphocyte differentiation leukocyte activation T cell activation T cell differentiation leukocyte differentiation regulation of body fluid levels wound healing hemostasis biological regulation blood coagulation coagulation regulation of biological quality response to wounding platelet activation cellular response to stimulus positive regulation of cell communication immune response-regulating cell surface receptor signaling pathway regulation of cellular process positive regulation of signal transduction positive regulation of T cell receptor signaling pathway signaling positive regulation of biological process regulation of antigen receptor-mediated signaling pathway regulation of signal transduction cell communication positive regulation of response to stimulus immune response-activating signaling pathway immune response-regulating signaling pathway positive regulation of immune response regulation of immune system process signal transduction positive regulation of immune system process positive regulation of cellular process regulation of biological process regulation of signaling cell surface receptor signaling pathway immune response-activating cell surface receptor signaling pathway regulation of T cell receptor signaling pathway T cell receptor signaling pathway regulation of response to stimulus regulation of immune response regulation of cell communication antigen receptor-mediated signaling pathway activation of immune response positive regulation of antigen receptor-mediated signaling pathway positive regulation of signaling regulation of programmed cell death regulation of intrinsic apoptotic signaling pathway intracellular signal transduction positive regulation of apoptotic signaling pathway regulation of intracellular signal transduction intrinsic apoptotic signaling pathway positive regulation of programmed cell death regulation of apoptotic process positive regulation of intracellular signal transduction cell death positive regulation of apoptotic process apoptotic signaling pathway positive regulation of intrinsic apoptotic signaling pathway apoptotic process programmed cell death regulation of apoptotic signaling pathway positive regulation of cell adhesion regulation of cell adhesion positive regulation of cell-cell adhesion heterotypic cell-cell adhesion cell adhesion cell-cell adhesion positive regulation of heterotypic cell-cell adhesion regulation of cell-cell adhesion regulation of heterotypic cell-cell adhesion regulation of leukocyte activation regulation of cell activation positive regulation of leukocyte cell-cell adhesion leukocyte cell-cell adhesion positive regulation of lymphocyte activation positive regulation of cell activation positive regulation of leukocyte activation regulation of multicellular organismal process positive regulation of T cell activation regulation of T cell activation lymphocyte costimulation regulation of leukocyte cell-cell adhesion positive regulation of multicellular organismal process T cell costimulation regulation of lymphocyte activation B cell receptor signaling pathway regulation of catalytic activity positive regulation of protein metabolic process positive regulation of peptidase activity positive regulation of cysteine-type endopeptidase activity involved in apoptotic process regulation of primary metabolic process positive regulation of molecular function positive regulation of metabolic process regulation of cysteine-type endopeptidase activity involved in apoptotic process regulation of proteolysis proteolysis regulation of endopeptidase activity positive regulation of macromolecule metabolic process activation of cysteine-type endopeptidase activity involved in apoptotic process regulation of cysteine-type endopeptidase activity regulation of protein metabolic process regulation of peptidase activity positive regulation of catalytic activity regulation of macromolecule metabolic process regulation of molecular function positive regulation of hydrolase activity positive regulation of cysteine-type endopeptidase activity regulation of hydrolase activity positive regulation of endopeptidase activity positive regulation of proteolysis regulation of metabolic process Fc receptor signaling pathway Fc-gamma receptor signaling pathway inorganic ion homeostasis cellular homeostasis chemical homeostasis homeostatic process intracellular monoatomic cation homeostasis intracellular zinc ion homeostasis monoatomic ion homeostasis intracellular chemical homeostasis monoatomic cation homeostasis intracellular monoatomic ion homeostasis leukocyte migration cell migration cell motility regulation of localization cellular localization intracellular calcium ion homeostasis transport monoatomic ion transmembrane transport negative regulation of biological process calcium ion homeostasis negative regulation of sequestering of calcium ion calcium ion transport metal ion transport maintenance of location in cell monoatomic cation transmembrane transport localization negative regulation of cellular process monoatomic ion transport monoatomic cation transport regulation of sequestering of calcium ion calcium ion transmembrane import into cytosol sequestering of calcium ion inorganic ion transmembrane transport establishment of localization inorganic cation transmembrane transport maintenance of location transmembrane transport release of sequestered calcium ion into cytosol calcium ion transmembrane transport cell surface receptor protein tyrosine kinase signaling pathway enzyme-linked receptor protein signaling pathway	extracellular exosome membrane-bounded organelle extracellular vesicle extracellular organelle extracellular region organelle extracellular space cellular anatomical entity vesicle extracellular membrane-bounded organelle intracellular anatomical structure cytoplasm cytosol pericentriolar material extracellular exosome membrane-bounded organelle extracellular vesicle extracellular organelle extracellular region organelle extracellular space cellular anatomical entity vesicle extracellular membrane-bounded organelle intracellular anatomical structure cytoplasm cytosol pericentriolar material intracellular organelle centrosome microtubule organizing center cytoskeleton intracellular non-membrane-bounded organelle microtubule cytoskeleton non-membrane-bounded organelle cell periphery extrinsic component of plasma membrane cytoplasmic side of plasma membrane cytoplasmic side of membrane membrane plasma membrane extrinsic component of membrane extrinsic component of cytoplasmic side of plasma membrane side of membrane membrane microdomain membrane raft immunological synapse

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR021963	T cell CD4 receptor C-terminal region	Domain
A	IPR036179	Immunoglobulin-like domain superfamily	Homologous Superfamily
A	IPR013106	Immunoglobulin V-set domain	Domain
A	IPR000973	T-cell surface antigen CD4	Family
A	IPR008424	Immunoglobulin C2-set	Domain
A	IPR015274	CD4, extracellular	Domain
A	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
A	IPR013151	Immunoglobulin	Domain
A	IPR007110	Immunoglobulin-like domain	Domain
A	IPR003599	Immunoglobulin subtype	Domain
A	IPR003598	Immunoglobulin subtype 2	Domain
B	IPR008266	Tyrosine-protein kinase, active site	Active Site
B	IPR020635	Tyrosine-protein kinase, catalytic domain	Domain
B	IPR036028	SH3-like domain superfamily	Homologous Superfamily
B	IPR000719	Protein kinase domain	Domain
B	IPR035850	Tyrosine-protein kinase Lck, SH2 domain	Domain
B	IPR001452	SH3 domain	Domain
B	IPR017441	Protein kinase, ATP binding site	Binding Site
B	IPR036860	SH2 domain superfamily	Homologous Superfamily
B	IPR000980	SH2 domain	Domain
B	IPR001245	Serine-threonine/tyrosine-protein kinase, catalytic domain	Domain
B	IPR035749	Lck, SH3 domain	Domain
B	IPR011009	Protein kinase-like domain superfamily	Homologous Superfamily

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A	Pharos: P01730	Duchenne muscular dystrophy diabetes mellitus AIDS-Related Opportunistic Infections lymphopenia coronary artery disease malignant glioma cryptococcosis neutropenia ovarian disease Duchenne and Becker muscular dystrophy pneumonia adult acute respiratory distress syndrome glioblastoma rheumatoid arthritis hepatitis B virus infection Duchenne muscular dystrophy diabetes mellitus AIDS-Related Opportunistic Infections lymphopenia coronary artery disease malignant glioma cryptococcosis neutropenia ovarian disease Duchenne and Becker muscular dystrophy pneumonia adult acute respiratory distress syndrome glioblastoma rheumatoid arthritis hepatitis B virus infection severe combined immunodeficiency arthritic joint disease HIV infectious disease IgA glomerulonephritis syphilis autoimmune disease influenza toxoplasmosis breast carcinoma kidney disease uveitis candidiasis lung carcinoma vertebral column disease colorectal cancer lymphoproliferative syndrome COVID-19 measles cutaneous lupus erythematosus obesity disorder diarrheal disease peripheral neuropathy prostate disease agammaglobulinemia heart disease rhinitis allergic disease hepatitis C virus infection hypereosinophilic syndrome skin disease asthma inborn carbohydrate metabolic disorder tetanus Becker muscular dystrophy interstitial lung disease tuberculosis breast disease leishmaniasis vaccinia colitis lymphatic system disease congenital T-cell immunodeficiency malaria Crohn disease demyelinating disease Okt4 epitope deficiency pneumocystosis encephalitis retinitis AIDS helminthiasis sarcoidosis anemia herpes zoster hypertensive disorder subependymal giant cell astrocytoma atherosclerosis infectious meningitis thrombocytopenia bone marrow disease invasive ductal breast carcinoma uterine disease cancer liver disease vasculitis colonic disease
B	Pharos: P06239	severe combined immunodeficiency due to LCK deficiency cancer atopic eczema cutaneous lupus erythematosus Philadelphia Chromosome Positive Chronic Myelocytic Leukemia renal cell carcinoma B-cell chronic lymphocytic leukemia interstitial cystitis sarcoidosis Sjogren syndrome osteosarcoma psoriasis ulcerative colitis