8EW6 | pdb_00008ew6

Anti-human CD8 VHH complex with CD8 alpha

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
SAbDab Antibody Annotation
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Pharos: Disease Associations

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A [auth W]	SCOP2B Superfamily	Immunoglobulin (Ig) domain-like	8054487	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)
B [auth V]	GTP_EFTU_D2	e8ew6V1	A: a/b three-layered sandwiches	X: RNase A-like	H: Cytochrome P450	T: Cytochrome P450	F: GTP_EFTU_D2	ECOD (v294.1)
A [auth W]	GTP_EFTU_D2	e8ew6W1	A: a/b three-layered sandwiches	X: RNase A-like	H: Cytochrome P450	T: Cytochrome P450	F: GTP_EFTU_D2	ECOD (v294.1)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B [auth V]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
B [auth V]	Heavy Chain	IGHV1	-	t-cell surface glycoprotein cd8 alpha chain	SAbDab (2026-04-10)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A [auth W]	PF07686	Immunoglobulin V-set domain (V-set)	Immunoglobulin V-set domain	This domain is found in antibodies as well as neural protein P0 and CTL4 amongst others.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
B [auth V]	Anti-CD8 alpha VHH	-	-	-
A [auth W]	T-cell surface glycoprotein CD8 alpha chain	molecular transducer activity coreceptor activity signaling receptor activity protein-containing complex binding binding MHC protein complex binding MHC class I protein complex binding protein binding MHC class I protein binding signaling receptor binding MHC protein binding	multicellular organismal process T cell activation immune system process cell activation cellular process lymphocyte activation leukocyte activation adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains lymphocyte mediated immunity T cell mediated immunity response to stimulus immune response leukocyte mediated immunity adaptive immune response multicellular organismal process T cell activation immune system process cell activation cellular process lymphocyte activation leukocyte activation adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains lymphocyte mediated immunity T cell mediated immunity response to stimulus immune response leukocyte mediated immunity adaptive immune response immune effector process cellular response to stimulus regulation of biological process regulation of cellular process cell surface receptor signaling pathway 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 T cell receptor signaling pathway regulation of response to stimulus regulation of immune response antigen receptor-mediated signaling pathway activation of immune response cell surface receptor protein tyrosine kinase signaling pathway enzyme-linked receptor protein signaling pathway developmental process cytotoxic T cell differentiation cellular developmental process hemopoiesis cell development mononuclear cell differentiation lymphocyte differentiation cell differentiation anatomical structure development T cell differentiation leukocyte differentiation antigen processing and presentation	protein-containing complex signaling receptor complex cell periphery cellular anatomical structure cell surface membrane plasma membrane external side of plasma membrane side of membrane plasma membrane protein complex plasma membrane signaling receptor complex membrane protein complex T cell receptor complex extracellular region protein-containing complex signaling receptor complex cell periphery cellular anatomical structure cell surface membrane plasma membrane external side of plasma membrane side of membrane plasma membrane protein complex plasma membrane signaling receptor complex membrane protein complex T cell receptor complex extracellular region membrane microdomain membrane raft plasma membrane raft plasma membrane region

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A [auth W]	IPR036179	Immunoglobulin-like domain superfamily	Homologous Superfamily
A [auth W]	IPR015468	CD8 alpha subunit	Family
A [auth W]	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
A [auth W]	IPR013106	Immunoglobulin V-set domain	Domain
A [auth W]	IPR003599	Immunoglobulin domain subtype	Domain
A [auth W]	IPR007110	Immunoglobulin-like domain	Domain

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A [auth W]	Pharos: P01732	susceptibility to respiratory infections associated with CD8alpha chain mutation thrombocytopenia DOID:0081062 urinary bladder disease hepatitis B virus infection vasculitis inflammatory bowel disease kidney disease lung cancer agammaglobulinemia lymphopenia arthritic joint disease mouth disease bone marrow disease ovarian disease susceptibility to respiratory infections associated with CD8alpha chain mutation thrombocytopenia DOID:0081062 urinary bladder disease hepatitis B virus infection vasculitis inflammatory bowel disease kidney disease lung cancer agammaglobulinemia lymphopenia arthritic joint disease mouth disease bone marrow disease ovarian disease psoriasis colonic disease spondyloarthropathy diabetes mellitus transitional cell carcinoma encephalitis uterine disease HIV infectious disease vertebral column disease influenza leishmaniasis lung carcinoma allergic disease lymphoproliferative syndrome asthma neutropenia breast disease pneumonia Sjogren syndrome COVID-19 tetanus diarrheal disease tuberculosis eye disease vaccinia inborn carbohydrate metabolic disorder interstitial lung disease liver disease adult acute respiratory distress syndrome lymphatic system disease anemia malaria autoimmune disease osteosarcoma cancer prostate disease chronic obstructive pulmonary disease skin disease stomach disease cutaneous lupus erythematosus

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 R01GM157729. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.