Annotations: 1Z2K

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Immunoglobulin (Ig) domain-like	8101877	3000071	SCOP2B (2021-05-27)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	PF11465	e1z2kA1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: PF11465	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF11465	Natural killer cell receptor 2B4 (Receptor_2B4)	Natural killer cell receptor 2B4	2B4 is a transmembrane receptor which is expressed primarily on natural killer cells. It plays a role in activating NK-mediated cytotoxicity through its interaction with CD48 on target cells in a subset of CD8 T cells [1]. The structure of 2B4 consis ...	2B4 is a transmembrane receptor which is expressed primarily on natural killer cells. It plays a role in activating NK-mediated cytotoxicity through its interaction with CD48 on target cells in a subset of CD8 T cells [1]. The structure of 2B4 consists of an immunoglobulin variable domain fold and contains two beta-sheets. One of the beta-sheets, the six-stranded sheet, contains structural features that may have a role in ligand recognition and receptor function [1].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Natural killer cell receptor 2B4	protein binding binding MHC class I protein binding signaling receptor binding MHC protein binding	multicellular organismal process myeloid dendritic cell activation immune system process cell activation cellular process myeloid leukocyte activation leukocyte activation biological process involved in interspecies interaction between organisms response to stimulus immune response response to other organism defense response defense response to symbiont response to external stimulus multicellular organismal process myeloid dendritic cell activation immune system process cell activation cellular process myeloid leukocyte activation leukocyte activation biological process involved in interspecies interaction between organisms response to stimulus immune response response to other organism defense response defense response to symbiont response to external stimulus response to biotic stimulus defense response to other organism response to stress innate immune response response to external biotic stimulus regulation of cellular process positive regulation of cell population proliferation CD8-positive, alpha-beta T cell activation regulation of alpha-beta T cell activation regulation of leukocyte activation CD8-positive, alpha-beta T cell proliferation positive regulation of alpha-beta T cell proliferation regulation of cell activation positive regulation of CD8-positive, alpha-beta T cell activation positive regulation of cell activation T cell activation alpha-beta T cell proliferation lymphocyte proliferation positive regulation of leukocyte activation positive regulation of CD8-positive, alpha-beta T cell proliferation alpha-beta T cell activation regulation of immune system process positive regulation of immune system process regulation of leukocyte proliferation regulation of biological process positive regulation of T cell activation cell population proliferation regulation of CD8-positive, alpha-beta T cell proliferation positive regulation of lymphocyte proliferation positive regulation of T cell proliferation positive regulation of alpha-beta T cell activation mononuclear cell proliferation regulation of cell population proliferation regulation of leukocyte cell-cell adhesion positive regulation of leukocyte proliferation positive regulation of multicellular organismal process positive regulation of biological process positive regulation of leukocyte cell-cell adhesion lymphocyte activation leukocyte cell-cell adhesion leukocyte proliferation positive regulation of cell-cell adhesion positive regulation of lymphocyte activation regulation of alpha-beta T cell proliferation cell adhesion cell-cell adhesion positive regulation of mononuclear cell proliferation regulation of multicellular organismal process regulation of cell-cell adhesion positive regulation of cellular process T cell proliferation regulation of lymphocyte proliferation positive regulation of cell adhesion regulation of cell adhesion biological regulation regulation of T cell activation regulation of T cell proliferation regulation of mononuclear cell proliferation regulation of CD8-positive, alpha-beta T cell activation regulation of lymphocyte activation positive regulation of natural killer cell proliferation regulation of natural killer cell activation positive regulation of natural killer cell activation natural killer cell activation natural killer cell proliferation regulation of natural killer cell proliferation adaptive immune response cell activation involved in immune response immune effector process natural killer cell activation involved in immune response leukocyte activation involved in immune response lymphocyte activation involved in immune response	cell periphery cell surface membrane plasma membrane cellular anatomical entity external side of plasma membrane side of membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
A	IPR036179	Immunoglobulin-like domain superfamily	Homologous Superfamily
A	IPR024303	Natural killer cell receptor 2B4, immunoglobulin domain	Domain

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), 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.