1EFX

STRUCTURE OF A COMPLEX BETWEEN THE HUMAN NATURAL KILLER CELL RECEPTOR KIR2DL2 AND A CLASS I MHC LIGAND HLA-CW3

Domain Annotation: SCOP Classification SCOP Database (version: 2.0) Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species
B	d1efxb2	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	C1 set domains (antibody constant domain-like)	beta2-microglobulin	human (Homo sapiens ) [TaxId: 9606 ]
B	d1efxb3	Artifacts	Tags	Tags	Tags	N-terminal Tags	human (Homo sapiens ) [TaxId: 9606 ]
A	d1efxa1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	C1 set domains (antibody constant domain-like)	Class I MHC, alpha-3 domain	human (Homo sapiens ) [TaxId: 9606 ]
A	d1efxa2	Alpha and beta proteins (a+b)	MHC antigen-recognition domain	MHC antigen-recognition domain	MHC antigen-recognition domain	Class I MHC, alpha-1 and alpha-2 domains	human (Homo sapiens ) [TaxId: 9606 ]
D	d1efxd1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	I set domains	Killer cell inhibitory receptor	human (Homo sapiens ) [TaxId: 9606 ]
D	d1efxd2	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	I set domains	Killer cell inhibitory receptor	human (Homo sapiens ) [TaxId: 9606 ]
E	d1efxe1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	I set domains	Killer cell inhibitory receptor	human (Homo sapiens ) [TaxId: 9606 ]
E	d1efxe2	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	I set domains	Killer cell inhibitory receptor	human (Homo sapiens ) [TaxId: 9606 ]

Domain Annotation: CATH CATH Database (version 4.2.0) Homepage

Chain	Domain	Class	Architecture	Topology	Homology
B	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins
A	3.30.500.10	Alpha Beta	2-Layer Sandwich	Murine Class I Major Histocompatibility Complex, H2-DB	Chain A, domain 1
A	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins
D	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins
D	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins
E	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins
E	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Identifier	Description	Comments	Source
B	PF07654	Immunoglobulin C1-set domain (C1-set)	Immunoglobulin C1-set domain	-	Domain
A	PF00129	Class I Histocompatibility antigen, domains alpha 1 and 2 (MHC_I)	Class I Histocompatibility antigen, domains alpha 1 and 2	-	Domain
A	PF06623	MHC_I C-terminus (MHC_I_C)	MHC_I C-terminus	-	Family
A	PF07654	Immunoglobulin C1-set domain (C1-set)	Immunoglobulin C1-set domain	-	Domain
C	PF00514	Armadillo/beta-catenin-like repeat (Arm)	Armadillo/beta-catenin-like repeat	-	Repeat
C	PF01749	Importin beta binding domain (IBB)	Importin beta binding domain	-	Family
C	PF16186	Atypical Arm repeat (Arm_3)	Atypical Arm repeat	-	Family
D, E	PF00047	Immunoglobulin domain (ig)	Immunoglobulin domain	Members of the immunoglobulin superfamily are found in hundreds of proteins of different functions. Examples include antibodies, the giant muscle kinase titin and receptor tyrosine kinases. Immunoglobulin-like domains may be involved in protein-prot ...	Members of the immunoglobulin superfamily are found in hundreds of proteins of different functions. Examples include antibodies, the giant muscle kinase titin and receptor tyrosine kinases. Immunoglobulin-like domains may be involved in protein-protein and protein-ligand interactions.	Domain

Gene Product Annotation Gene Product Annotation

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
B	BETA-2-MICROGLOBULIN	binding protein binding identical protein binding protein homodimerization activity protein dimerization activity	cellular process response to inorganic substance response to metal ion response to iron ion response to chemical response to stimulus cellular response to stimulus cellular response to chemical stimulus cellular response to inorganic substance cellular response to metal ion cellular response to iron ion response to iron(III) ion cellular response to iron(III) ion response to nicotine cellular response to nicotine homeostatic process chemical homeostasis ion homeostasis metal ion homeostasis iron ion homeostasis transition metal ion homeostasis cation homeostasis biological regulation regulation of biological quality inorganic ion homeostasis cell population proliferation negative regulation of cell population proliferation regulation of cell population proliferation negative regulation of biological process negative regulation of cellular process epithelial cell proliferation regulation of epithelial cell proliferation negative regulation of epithelial cell proliferation regulation of biological process regulation of cellular process negative regulation of protein binding regulation of protein binding negative regulation of molecular function regulation of binding negative regulation of binding regulation of molecular function regulation of receptor binding negative regulation of receptor binding positive regulation of molecular function positive regulation of binding regulation of ferrous iron binding positive regulation of ferrous iron binding positive regulation of protein binding positive regulation of receptor binding regulation of transferrin receptor binding positive regulation of transferrin receptor binding cellular component organization cellular component assembly protein-containing complex subunit organization cellular component biogenesis protein complex oligomerization protein homooligomerization protein tetramerization protein homotetramerization protein-containing complex assembly cellular component organization or biogenesis viral process biological process involved in symbiotic interaction biological process involved in interspecies interaction between organisms regulation of defense response to virus by virus response to cadmium ion response to drug	intracellular anatomical structure cytoplasm cytosol cellular anatomical entity endosome early endosome endomembrane system cytoplasmic vesicle endosome lumen early endosome lumen membrane-enclosed lumen vesicle organelle membrane-bounded organelle intracellular organelle organelle lumen intracellular organelle lumen intracellular vesicle endosome membrane membrane organelle membrane early endosome membrane bounding membrane of organelle endoplasmic reticulum endoplasmic reticulum lumen intracellular membrane-bounded organelle vesicle membrane ER to Golgi transport vesicle membrane transport vesicle COPII-coated ER to Golgi transport vesicle coated vesicle transport vesicle membrane cytoplasmic vesicle membrane coated vesicle membrane plasma membrane external side of plasma membrane cell surface cell periphery side of membrane extracellular region extracellular space extracellular organelle extracellular exosome extracellular vesicle focal adhesion cell junction cell-substrate junction anchoring junction Golgi apparatus protein-containing complex receptor complex membrane protein complex plasma membrane protein complex plasma membrane signaling receptor complex HFE-transferrin receptor complex endoplasmic reticulum membrane integral component of membrane integral component of endoplasmic reticulum membrane intrinsic component of membrane intrinsic component of endoplasmic reticulum membrane intrinsic component of organelle membrane integral component of organelle membrane organelle subcompartment nuclear outer membrane-endoplasmic reticulum membrane network MHC class I peptide loading complex endoplasmic reticulum subcompartment endoplasmic reticulum protein-containing complex MHC protein complex MHC class I protein complex endocytic vesicle endocytic vesicle membrane phagocytic vesicle membrane phagocytic vesicle recycling endosome recycling endosome membrane secretory granule vesicle lumen secretory granule lumen specific granule lumen specific granule cytoplasmic vesicle lumen secretory vesicle tertiary granule tertiary granule lumen
A	HLA-CW3 (HEAVY CHAIN)	antigen binding binding amide binding peptide binding peptide antigen binding protein binding TAP binding	viral process biological process involved in symbiotic interaction biological process involved in interspecies interaction between organisms	cell surface cellular anatomical entity intracellular anatomical structure cytoplasm endosome early endosome endosome membrane endomembrane system membrane organelle membrane cytoplasmic vesicle early endosome membrane vesicle organelle membrane-bounded organelle intracellular vesicle bounding membrane of organelle endoplasmic reticulum intracellular organelle intracellular membrane-bounded organelle vesicle membrane ER to Golgi transport vesicle membrane transport vesicle COPII-coated ER to Golgi transport vesicle coated vesicle transport vesicle membrane cytoplasmic vesicle membrane coated vesicle membrane extracellular region extracellular space extracellular organelle extracellular exosome extracellular vesicle Golgi apparatus endoplasmic reticulum membrane integral component of membrane integral component of endoplasmic reticulum membrane intrinsic component of membrane intrinsic component of endoplasmic reticulum membrane intrinsic component of organelle membrane integral component of organelle membrane organelle subcompartment nuclear outer membrane-endoplasmic reticulum membrane network integral component of lumenal side of endoplasmic reticulum membrane side of membrane lumenal side of endoplasmic reticulum membrane lumenal side of membrane endoplasmic reticulum subcompartment plasma membrane integral component of plasma membrane intrinsic component of plasma membrane cell periphery protein-containing complex MHC protein complex MHC class I protein complex membrane protein complex plasma membrane protein complex endocytic vesicle endocytic vesicle membrane phagocytic vesicle membrane phagocytic vesicle recycling endosome recycling endosome membrane secretory granule secretory granule membrane secretory vesicle
C	PEPTIDE FROM IMPORTIN ALPHA-2	binding protein binding enzyme binding histone deacetylase binding nuclear import signal receptor activity molecular carrier activity nucleocytoplasmic carrier activity signal sequence binding nuclear localization sequence binding amide binding peptide binding nucleic acid binding RNA binding organic cyclic compound binding heterocyclic compound binding	cellular process viral process modulation by virus of host process modulation by virus of host cellular process modulation of process of other organism modulation by symbiont of host process modulation by symbiont of host cellular process biological process involved in symbiotic interaction biological process involved in interspecies interaction between organisms biological process involved in interaction with host modulation of process of other organism involved in symbiotic interaction viral life cycle regulation of biological process involved in symbiotic interaction positive regulation of biological process positive regulation of viral process regulation of biological process regulation of viral process biological regulation regulation of viral life cycle positive regulation of viral life cycle	intracellular anatomical structure cytoplasm cellular anatomical entity cytosol endoplasmic reticulum endoplasmic reticulum membrane endomembrane system membrane organelle membrane organelle subcompartment nuclear outer membrane-endoplasmic reticulum membrane network organelle membrane-bounded organelle intracellular organelle intracellular membrane-bounded organelle endoplasmic reticulum subcompartment plasma membrane extrinsic component of plasma membrane extrinsic component of membrane cell junction synapse postsynaptic membrane cell periphery synaptic membrane plasma membrane region postsynapse extrinsic component of postsynaptic membrane extrinsic component of postsynaptic specialization membrane extrinsic component of synaptic membrane postsynaptic specialization postsynaptic specialization membrane host cellular component host cell nucleus nucleoplasm membrane-enclosed lumen nuclear lumen organelle lumen intracellular organelle lumen
D, E	NATURAL KILLER CELL RECEPTOR KIR2DL2			membrane integral component of membrane intrinsic component of membrane cellular anatomical entity plasma membrane cell periphery

RCSB PDB is 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.