Annotations: 9KWE

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
B [auth F]	SCOP2B Superfamily	Immunoglobulin (Ig) domain-like	8081005	3000071	SCOP2B (2022-06-29)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
D [auth L]	Light Chain	IGKV15	Kappa	butyrophilin subfamily 3 member a2	SAbDab (2026-01-23)
C [auth H]	Heavy Chain	IGHV1	-	butyrophilin subfamily 3 member a2	SAbDab (2026-01-23)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
B [auth F]	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
B [auth F]	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
A [auth E]	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 [auth E]	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
D [auth L]	ICT01 light chain	-	-	-
C [auth H]	ICT01 heavy chain	-	-	-
B [auth F]	Butyrophilin subfamily 3 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 adaptive immune response multicellular organismal process positive regulation of macromolecule biosynthetic process positive regulation of metabolic process positive regulation of biosynthetic process cytokine production regulation of cytokine production positive regulation of macromolecule metabolic process regulation of multicellular organismal process positive regulation of cellular process regulation of biosynthetic process regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process regulation of gene expression biosynthetic process positive regulation of gene expression positive regulation of multicellular organismal process regulation of macromolecule biosynthetic process metabolic process macromolecule metabolic process positive regulation of cytokine production regulation of metabolic process cell population proliferation cell activation lymphocyte activation leukocyte proliferation activated T cell proliferation leukocyte activation mononuclear cell proliferation T cell activation lymphocyte proliferation T cell proliferation regulation of type II interferon production type II interferon production positive regulation of type II interferon production	cell periphery cellular anatomical structure cell surface membrane plasma membrane external side of plasma membrane side of membrane
A [auth E]	Butyrophilin subfamily 3 member A2	protein binding binding signaling receptor binding	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 immune system process leukocyte mediated immunity adaptive immune response immune effector process cellular response to stimulus immune response-regulating cell surface receptor signaling pathway regulation of cellular process signaling positive regulation of biological process 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 immune system process leukocyte mediated immunity adaptive immune response immune effector process cellular response to stimulus immune response-regulating cell surface receptor signaling pathway regulation of cellular process 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 biological regulation T cell receptor signaling pathway regulation of response to stimulus regulation of immune response cellular process antigen receptor-mediated signaling pathway activation of immune response multicellular organismal process regulation of type II interferon production type II interferon production positive regulation of macromolecule biosynthetic process positive regulation of metabolic process positive regulation of biosynthetic process cytokine production regulation of cytokine production regulation of multicellular organismal process positive regulation of macromolecule metabolic process positive regulation of cellular process regulation of biosynthetic process regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process positive regulation of type II interferon production regulation of gene expression biosynthetic process positive regulation of gene expression positive regulation of multicellular organismal process metabolic process regulation of macromolecule biosynthetic process macromolecule metabolic process positive regulation of cytokine production regulation of metabolic process	cell periphery cellular anatomical structure cell surface membrane plasma membrane external side of plasma membrane side of membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
B [auth F]	IPR036179	Immunoglobulin-like domain superfamily	Homologous Superfamily
B [auth F]	IPR001870	B30.2/SPRY domain	Domain
B [auth F]	IPR006574	SPRY-associated	Domain
B [auth F]	IPR003879	Butyrophylin-like, SPRY domain	Domain
B [auth F]	IPR013320	Concanavalin A-like lectin/glucanase domain superfamily	Homologous Superfamily
B [auth F]	IPR053896	Butyrophilin subfamily 3 member A2-like, Ig-C domain	Domain
B [auth F]	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
B [auth F]	IPR013106	Immunoglobulin V-set domain	Domain
B [auth F]	IPR050504	Immunoglobulin superfamily BTN/MOG domain-containing protein	Family
B [auth F]	IPR003599	Immunoglobulin domain subtype	Domain
B [auth F]	IPR043136	B30.2/SPRY domain superfamily	Homologous Superfamily
B [auth F]	IPR007110	Immunoglobulin-like domain	Domain
B [auth F]	IPR037954	Butyrophilin subfamily 3, PRY/SPRY domain	Domain
B [auth F]	IPR003877	SPRY domain	Domain
A [auth E]	IPR036179	Immunoglobulin-like domain superfamily	Homologous Superfamily
A [auth E]	IPR053896	Butyrophilin subfamily 3 member A2-like, Ig-C domain	Domain
A [auth E]	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
A [auth E]	IPR013106	Immunoglobulin V-set domain	Domain
A [auth E]	IPR050504	Immunoglobulin superfamily BTN/MOG domain-containing protein	Family
A [auth E]	IPR003599	Immunoglobulin domain subtype	Domain
A [auth E]	IPR007110	Immunoglobulin-like domain	Domain

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
B [auth F]	Pharos: O00481	lung carcinoma postmenopausal osteoporosis squamous cell lung carcinoma attention deficit hyperactivity disorder, inattentive type bone Paget disease cutaneous lupus erythematosus gastroesophageal reflux disease Hypogonadal Osteoporosis in Males ovarian cancer ulcerative colitis autism spectrum disorder chronic obstructive pulmonary disease dental caries lung cancer osteoporosis lung carcinoma postmenopausal osteoporosis squamous cell lung carcinoma attention deficit hyperactivity disorder, inattentive type bone Paget disease cutaneous lupus erythematosus gastroesophageal reflux disease Hypogonadal Osteoporosis in Males ovarian cancer ulcerative colitis autism spectrum disorder chronic obstructive pulmonary disease dental caries lung cancer osteoporosis pilocytic astrocytoma Sjogren syndrome Crohn disease endogenous depression osteosarcoma
A [auth E]	Pharos: P78410	lung carcinoma oligodendroglioma pilocytic astrocytoma subependymal giant cell astrocytoma astrocytic tumor breast cancer Crohn disease endogenous depression glioblastoma lung cancer malignant glioma ovarian cancer Sjogren syndrome tuberculosis attention deficit hyperactivity disorder, inattentive type lung carcinoma oligodendroglioma pilocytic astrocytoma subependymal giant cell astrocytoma astrocytic tumor breast cancer Crohn disease endogenous depression glioblastoma lung cancer malignant glioma ovarian cancer Sjogren syndrome tuberculosis attention deficit hyperactivity disorder, inattentive type breast carcinoma cutaneous lupus erythematosus esophageal adenocarcinoma juvenile dermatomyositis nephrosclerosis pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia squamous cell lung carcinoma ulcerative colitis autism spectrum disorder chronic obstructive pulmonary disease dental caries gastroesophageal reflux disease limb-girdle muscular dystrophy malignant ependymoma