8SZY | pdb_00008szy

Crystal Structure of Heterotrimeric Anti-TIGIT Fabs in complex with human TIGIT

External Resource: Annotation

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

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
J [auth U]		e8szyU1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Helicase_C	F:	ECOD (20:10:01)
E [auth T]		e8szyT1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: MaoC_dehydratas	F:	ECOD (20:10:01)
I [auth M]		e8szyM1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Helicase_C	F:	ECOD (20:10:01)
D [auth L]		e8szyL1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: MaoC_dehydratas	F:	ECOD (20:10:01)
H [auth I]		e8szyI1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Helicase_C	F:	ECOD (20:10:01)
C [auth H]		e8szyH1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: MaoC_dehydratas	F:	ECOD (20:10:01)
G [auth D]		e8szyD1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Helicase_C	F:	ECOD (20:10:01)
B		e8szyB1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: MaoC_dehydratas	F:	ECOD (20:10:01)
F [auth C]		e8szyC1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Helicase_C	F:	ECOD (20:10:01)
A		e8szyA1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: MaoC_dehydratas	F:	ECOD (20:10:01)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
D [auth L], I [auth M]	Light Chain	IGKV3	Kappa	t-cell immunoreceptor with ig and itim domains	SAbDab (2026-03-13)
C [auth H], H [auth I]	Heavy Chain	IGHV4	-	t-cell immunoreceptor with ig and itim domains	SAbDab (2026-03-13)
B, G [auth D]	Light Chain	IGKV1	Kappa	t-cell immunoreceptor with ig and itim domains	SAbDab (2026-03-13)
A, F [auth C]	Heavy Chain	IGHV1	-	t-cell immunoreceptor with ig and itim domains	SAbDab (2026-03-13)

Thera-SAbDab Antibody Annotation Thera-SAbDab Database Homepage

Chain	Name	Target	Provenance Source
D [auth L], I [auth M]	Renvistobart	TIGIT/WUCAM/VSTM3	Therapeutic SAbDab (2026-03-13)
C [auth H], H [auth I]	Renvistobart	TIGIT/WUCAM/VSTM3	Therapeutic SAbDab (2026-03-13)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
E [auth T], J [auth U]	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
E [auth T], J [auth U]	T-cell immunoreceptor with Ig and ITIM domains	molecular transducer activity signaling receptor activity protein binding binding signaling receptor binding identical protein binding	multicellular organismal process regulation of cellular process positive regulation of biological process interleukin-10 production positive regulation of macromolecule biosynthetic process positive regulation of metabolic process positive regulation of biosynthetic process regulation of cytokine production cytokine production regulation of multicellular organismal process positive regulation of macromolecule metabolic process regulation of interleukin-10 production positive regulation of cellular process regulation of biosynthetic process multicellular organismal process regulation of cellular process positive regulation of biological process interleukin-10 production positive regulation of macromolecule biosynthetic process positive regulation of metabolic process positive regulation of biosynthetic process regulation of cytokine production cytokine production regulation of multicellular organismal process positive regulation of macromolecule metabolic process regulation of interleukin-10 production positive regulation of cellular process regulation of biosynthetic process regulation of biological process biological regulation regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process positive regulation of interleukin-10 production regulation of gene expression biosynthetic process positive regulation of gene expression positive regulation of multicellular organismal process regulation of macromolecule biosynthetic process metabolic process cellular process macromolecule metabolic process positive regulation of cytokine production regulation of metabolic process negative regulation of biological process regulation of interleukin-12 production negative regulation of interleukin-12 production negative regulation of cellular process interleukin-12 production negative regulation of macromolecule metabolic process negative regulation of metabolic process negative regulation of cytokine production negative regulation of gene expression negative regulation of biosynthetic process negative regulation of macromolecule biosynthetic process negative regulation of multicellular organismal process regulation of leukocyte activation regulation of cell activation lymphocyte activation negative regulation of lymphocyte activation leukocyte cell-cell adhesion negative regulation of cell adhesion leukocyte activation cell adhesion cell-cell adhesion T cell activation regulation of immune system process regulation of cell-cell adhesion regulation of cell adhesion cell activation regulation of T cell activation negative regulation of cell activation negative regulation of T cell activation negative regulation of immune system process negative regulation of leukocyte cell-cell adhesion immune system process negative regulation of cell-cell adhesion regulation of leukocyte cell-cell adhesion negative regulation of leukocyte activation regulation of lymphocyte activation regulation of immune effector process lymphocyte mediated immunity response to stimulus negative regulation of lymphocyte mediated immunity response to biotic stimulus negative regulation of natural killer cell mediated immunity leukocyte mediated immunity natural killer cell mediated immunity regulation of natural killer cell mediated immunity immune response response to other organism regulation of innate immune response negative regulation of immune response negative regulation of immune effector process response to external stimulus leukocyte mediated cytotoxicity immune effector process regulation of leukocyte mediated immunity regulation of response to stimulus defense response to other organism negative regulation of response to external stimulus negative regulation of defense response natural killer cell mediated cytotoxicity regulation of immune response regulation of cell killing negative regulation of natural killer cell mediated cytotoxicity regulation of defense response regulation of response to biotic stimulus regulation of natural killer cell mediated cytotoxicity biological process involved in interspecies interaction between organisms regulation of response to external stimulus negative regulation of response to biotic stimulus response to stress regulation of response to stress negative regulation of leukocyte mediated cytotoxicity innate immune response response to external biotic stimulus negative regulation of cell killing defense response negative regulation of response to stimulus regulation of leukocyte mediated cytotoxicity defense response to symbiont regulation of lymphocyte mediated immunity negative regulation of leukocyte mediated immunity cell killing negative regulation of innate immune response	cell surface cellular anatomical structure cell periphery plasma membrane membrane
D [auth L], I [auth M]	BMS-986207 light chain	-	-	-
C [auth H], H [auth I]	BMS-986207 Fab Heavy Chain	-	-	-
B, G [auth D]	CHA.9.543 light chain	-	-	-
A, F [auth C]	CHA.9.543 Fab heavy chain	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
E [auth T], J [auth U]	IPR036179	Immunoglobulin-like domain superfamily	Homologous Superfamily
E [auth T], J [auth U]	IPR042948	T-cell immunoglobulin and ITIM domain receptor	Family
E [auth T], J [auth U]	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
E [auth T], J [auth U]	IPR013106	Immunoglobulin V-set domain	Domain
E [auth T], J [auth U]	IPR003599	Immunoglobulin domain subtype	Domain
E [auth T], J [auth U]	IPR007110	Immunoglobulin-like domain	Domain

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
E [auth T], J [auth U]	Pharos: Q495A1	cancer osteosarcoma interstitial cystitis psoriasis invasive ductal breast carcinoma Sjogren syndrome

Protein Modification Annotation

Modified Residue(s)
Chain	Residue(s)	Description
C [auth H], H [auth I]	PCA	Parent Component: GLN RESID: AA0031 PSI-MOD : 2-pyrrolidone-5-carboxylic acid (Gln) MOD:00040 , 2-pyrrolidone-5-carboxylic acid (Glu) MOD:00420

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.