Annotations: 2HAC

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	UNK_F_TYPE	e2hacA1	A: alpha duplicates or obligate multimers	X: Transmembrane domain of CD3 zeta chain (From Topology)	H: Transmembrane domain of CD3 zeta chain (From Topology)	T: Transmembrane domain of CD3 zeta chain	F: UNK_F_TYPE	ECOD (1.6)
B	UNK_F_TYPE	e2hacB1	A: alpha duplicates or obligate multimers	X: Transmembrane domain of CD3 zeta chain (From Topology)	H: Transmembrane domain of CD3 zeta chain (From Topology)	T: Transmembrane domain of CD3 zeta chain	F: UNK_F_TYPE	ECOD (1.6)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	T-cell surface glycoprotein CD3 zeta chain	identical protein binding protein binding binding protein homodimerization activity protein dimerization activity protein heterodimerization activity protein tyrosine kinase binding kinase binding enzyme binding protein kinase binding molecular transducer activity transmembrane signaling receptor activity signaling receptor activity	cellular component organization cellular component biogenesis cellular component assembly protein-containing complex organization protein complex oligomerization protein-containing complex assembly cellular process cellular component organization or biogenesis cellular response to stimulus regulation of biological process regulation of cellular process cell surface receptor signaling pathway response to stimulus signaling cellular component organization cellular component biogenesis cellular component assembly protein-containing complex organization protein complex oligomerization protein-containing complex assembly cellular process cellular component organization or biogenesis cellular response to stimulus regulation of biological process regulation of cellular process cell surface receptor signaling pathway response to stimulus signaling biological regulation signal transduction cell communication immune response-regulating cell surface receptor signaling pathway positive regulation of biological process 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 positive regulation of immune system process immune response-activating cell surface receptor signaling pathway immune response T cell receptor signaling pathway regulation of response to stimulus immune system process regulation of immune response antigen receptor-mediated signaling pathway activation of immune response adaptive immune response Fc receptor signaling pathway Fc-gamma receptor signaling pathway protein localization regulation of localization cellular localization regulation of protein localization positive regulation of protein localization to cell surface localization protein localization to cell surface regulation of cellular localization cellular macromolecule localization macromolecule localization positive regulation of protein localization regulation of protein localization to cell surface positive regulation of cellular process multicellular organismal process gamma-delta T cell activation T cell activation cell activation lymphocyte activation leukocyte activation alpha-beta T cell activation	protein-containing complex plasma membrane protein complex membrane plasma membrane membrane protein complex gamma-delta T cell receptor complex cellular anatomical entity receptor complex cell periphery plasma membrane signaling receptor complex T cell receptor complex Fc-gamma receptor III complex Fc receptor complex membrane-bounded organelle protein-containing complex plasma membrane protein complex membrane plasma membrane membrane protein complex gamma-delta T cell receptor complex cellular anatomical entity receptor complex cell periphery plasma membrane signaling receptor complex T cell receptor complex Fc-gamma receptor III complex Fc receptor complex membrane-bounded organelle intracellular organelle intracellular anatomical structure Golgi apparatus organelle cytoplasm intracellular membrane-bounded organelle endomembrane system alpha-beta T cell receptor complex

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR024128	T-cell surface glycoprotein CD3 zeta subunit	Family
A, B	IPR003110	Phosphorylated immunoreceptor signalling ITAM	Repeat
A, B	IPR021663	T-cell surface glycoprotein CD3 zeta subunit/High affinity IgE receptor gamma subunit	Family

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A, B	Pharos: P20963	systemic sclerosis immunodeficiency 25 oligoarticular juvenile idiopathic arthritis allergic rhinitis cutaneous lupus erythematosus hematologic disease interstitial cystitis lung carcinoma osteosarcoma Systemic Scleroderma asthma diffuse scleroderma hypothyroidism juvenile idiopathic arthritis lymphatic system disease systemic sclerosis immunodeficiency 25 oligoarticular juvenile idiopathic arthritis allergic rhinitis cutaneous lupus erythematosus hematologic disease interstitial cystitis lung carcinoma osteosarcoma Systemic Scleroderma asthma diffuse scleroderma hypothyroidism juvenile idiopathic arthritis lymphatic system disease psoriasis cancer Hashimoto thyroiditis lung cancer rheumatoid factor-negative juvenile idiopathic arthritis

Membrane Protein Annotation: OPM OPM Database Homepage

Chains	External Link	Type	Class	Superfamily	Family
A, B	OPM	Transmembrane	Bitopic proteins	T-cell and B-cell receptor complexes	Pre-T-cell antigen receptor

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

Chains	External Link	Comment
A, B	PDBTM	Annotated as membrane protein by PDBTM

Membrane Protein Annotation: MemProtMD MemProtMD Database Homepage

Chains	External Link	Comment
A, B	MemProtMD	Annotated as membrane protein by MemProtMD

Membrane Protein Annotation: mpstruc mpstruc Database Homepage

Chains	Resource Link	Group	Subgroup	Protein
A, B	mpstruc	TRANSMEMBRANE PROTEINS: ALPHA-HELICAL	Immune Receptors	Transmembrane ζ-ζ dimer of the TCR-CD3 complex

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.