Annotations: 9L1P

Cryo-EM structure of the ICT01-BTN2A1/BTN3A1/BTN3A2 complex, local refinement

External Resource: Annotation

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

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A [auth B]	MeMO_Hyd_G	e9l1pB1	A: alpha arrays	X: Hypothetical protein YqbG-like	H: Hypothetical protein YqbG-like	T: alpha/beta-Hydrolases	F: MeMO_Hyd_G	ECOD (v295.2)
B [auth E]	MeMO_Hyd_G	e9l1pE1	A: alpha arrays	X: Hypothetical protein YqbG-like	H: Hypothetical protein YqbG-like	T: alpha/beta-Hydrolases	F: MeMO_Hyd_G	ECOD (v295.2)
C [auth H]	PCI	e9l1pH1	A: alpha arrays	X: Hypothetical protein YqbG-like	H: Hypothetical protein YqbG-like	T: alpha/beta-Hydrolases	F: PCI	ECOD (v295.2)
D [auth L]	SPRY	e9l1pL1	A: alpha arrays	X: Hypothetical protein YqbG-like	H: Hypothetical protein YqbG-like	T: alpha/beta-Hydrolases	F: SPRY	ECOD (v295.2)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
C [auth H]	Heavy Chain	IGHV1	-	butyrophilin subfamily 3 member a2 \| butyrophilin subfamily 2 member a1	SAbDab (2026-08-21)
D [auth L]	Light Chain	IGKV15	Kappa	butyrophilin subfamily 3 member a2 \| butyrophilin subfamily 2 member a1	SAbDab (2026-08-21)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A [auth B]	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 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

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth B]	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 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
C [auth H]	ICT01 heavy chain	-	-	-
D [auth L]	ICT01 light chain	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

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

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A [auth B]	: 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
B [auth E]	: 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