9DPE | pdb_00009dpe

CryoEM Structure of Human BTN2A1 ectodomain in complex with TCR-blocking 2A1.12 Fab

External Resource: Annotation

SAbDab Antibody Annotation
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Pharos: Disease Associations

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
B [auth H]	Heavy Chain	IGHV3	-	butyrophilin subfamily 2 member a1	SAbDab (2025-09-26)
C [auth L]	Light Chain	IGKV1	Kappa	butyrophilin subfamily 2 member a1	SAbDab (2025-09-26)
D [auth N]	Heavy Chain	IGHV1	-	-	SAbDab (2025-09-26)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	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
A	PF22705	Butyrophilin subfamily 3 member A2-like, Ig-C domain (C2-set_3)	Butyrophilin subfamily 3 member A2-like, Ig-C domain	This domain is found in human Butyrophilin subfamily 3 member A2 (BTN3A2), a protein that plays a role in T-cell responses in the adaptive immune response. BTN3A2 shows two extracellular domains: an N-terminal Ig-V like domain (Pfam:PF07686) and a C- ...	This domain is found in human Butyrophilin subfamily 3 member A2 (BTN3A2), a protein that plays a role in T-cell responses in the adaptive immune response. BTN3A2 shows two extracellular domains: an N-terminal Ig-V like domain (Pfam:PF07686) and a C-terminal Ig-C type domain that is located in the centre of the protein sequence [6].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Butyrophilin subfamily 2 member A1	protein binding binding signaling receptor binding	cellular response to stimulus immune response-regulating cell surface receptor signaling pathway regulation of cellular process response to stimulus signaling positive regulation of biological process 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 cellular response to stimulus immune response-regulating cell surface receptor signaling pathway regulation of cellular process response to stimulus signaling positive regulation of biological process 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 regulation of biological process cell surface receptor signaling pathway immune response-activating cell surface receptor signaling pathway immune response biological regulation T cell receptor signaling pathway regulation of response to stimulus immune system process regulation of immune response cellular process antigen receptor-mediated signaling pathway activation of immune response primary metabolic process metabolic process lipid metabolic process regulation of biosynthetic process multicellular organismal process regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process regulation of gene expression biosynthetic process regulation of cytokine production cytokine production regulation of macromolecule biosynthetic process regulation of multicellular organismal process macromolecule metabolic process regulation of metabolic process	cell periphery cellular anatomical structure cell surface membrane plasma membrane external side of plasma membrane side of membrane
B [auth H]	Human IgG1 Fragment Antibody Heavy Chain	-	-	-
C [auth L]	Human IgG1 Fragment Antibody Light Chain	-	-	-
D [auth N]	Human variable heavy-chain domain Nanobody	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR036179	Immunoglobulin-like domain superfamily	Homologous Superfamily
A	IPR001870	B30.2/SPRY domain	Domain
A	IPR006574	SPRY-associated	Domain
A	IPR037958	Butyrophilin subfamily 1/2, SPRY/PRY domain	Domain
A	IPR003879	Butyrophylin-like, SPRY domain	Domain
A	IPR013320	Concanavalin A-like lectin/glucanase domain superfamily	Homologous Superfamily
A	IPR053896	Butyrophilin subfamily 3 member A2-like, Ig-C domain	Domain
A	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
A	IPR013106	Immunoglobulin V-set domain	Domain
A	IPR050504	Immunoglobulin superfamily BTN/MOG domain-containing protein	Family
A	IPR003599	Immunoglobulin domain subtype	Domain
A	IPR043136	B30.2/SPRY domain superfamily	Homologous Superfamily
A	IPR007110	Immunoglobulin-like domain	Domain
A	IPR003877	SPRY domain	Domain

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A	Pharos: Q7KYR7	autism spectrum disorder endogenous depression juvenile dermatomyositis Sjogren syndrome chronic obstructive pulmonary disease gastroesophageal reflux disease lung carcinoma squamous cell lung carcinoma dermatomyositis glioblastoma ovarian cancer

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.