2HFG | pdb_00002hfg

Crystal structure of hBR3 bound to CB3s-Fab

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
IMGT Antibody Annotation
SAbDab Antibody Annotation
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Pharos: Disease Associations

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A [auth L]	d2hfgl2	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	C1 set domains (antibody constant domain-like)	automated matches	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
A [auth L]	d2hfgl1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	automated matches	automated matches	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
C [auth R]	d2hfgr_	Small proteins	TNF receptor-like	TNF receptor-like	BAFF receptor-like	automated matches	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
B [auth H]	d2hfgh1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	Immunoglobulin heavy chain variable domain, VH	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
B [auth H]	d2hfgh2	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	C1 set domains (antibody constant domain-like)	Immunoglobulin heavy chain gamma constant domain 1, CH1-gamma	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A [auth L]	MarR	e2hfgL2	A: alpha bundles	X: HTH	H: Nudix	T: winged helix domain	F: MarR	ECOD (develop294)
C [auth R]	RGS	e2hfgR1	A: alpha bundles	X: Globin-like	H: Globin-like	T: Globin-like	F: RGS	ECOD (develop294)
B [auth H]	Copper-bind	e2hfgH1	A: alpha bundles	X: Cloacin translocation domain	H: beta-Prism I	T: beta-Prism I	F: Copper-bind	ECOD (develop294)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A [auth L]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
B [auth H]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)

IMGT Antibody Annotation IMGT Database Homepage

Chain	Protein Name	Description	Organism Name	Gene Allele Name(s)	Domain Name(s)	Receptor Type	Receptor Description	Provenance Source
A [auth L]	CB3S	L-KAPPA	Homo sapiens (human)	IGKV1-501, IGKV1-503, IGKJ101, IGKC01	V-DOMAIN V-KAPPA, C-DOMAIN C-KAPPA	IG	FAB-GAMMA-1_KAPPA	IMGT (202610-0)
C [auth R]	TNFRSF13C (Tumor necrosis factor receptor superfamily member 13C)	TNFRSF13C (Pr1-71 20V>N, 27L>P)	Homo sapiens (human)	TNFRSF13C*01	R-LIKE-DOMAIN TNFR-CYS	RPI	TNFRSF13C (Pr1-71 20V>N, 27L>P)	IMGT (202610-0)
B [auth H]	CB3S	VH-CH1	Homo sapiens (human)	IGHV3-6601, IGHV3-6602, IGHV3-6604, IGHJ401, IGHJ402, IGHJ403, IGHG101, IGHG102, IGHG104, IGHG105	V-DOMAIN VH, C-DOMAIN CH1	IG	FAB-GAMMA-1_KAPPA	IMGT (202610-0)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
A [auth L]	Light Chain	IGKV1	Kappa	tumor necrosis factor receptor superfamily member 13c	SAbDab (2026-03-20)
B [auth H]	Heavy Chain	IGHV3	-	tumor necrosis factor receptor superfamily member 13c	SAbDab (2026-03-20)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
C [auth R]	PF09256	BAFF-R, TALL-1 binding (BaffR-Tall_bind)	BAFF-R, TALL-1 binding	Members of this family, which are predominantly found in the tumour necrosis factor receptor superfamily member 13c, BAFF-R, are required for binding to tumour necrosis factor ligand TALL-1 [1].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth L]	CB3s Fab light chain (kappa)	-	-	-
C [auth R]	Tumor necrosis factor receptor superfamily member 13C	molecular transducer activity signaling receptor activity	multicellular organismal process regulation of cellular process regulation of leukocyte activation positive regulation of biological process regulation of cell activation positive regulation of leukocyte cell-cell adhesion lymphocyte activation leukocyte cell-cell adhesion leukocyte activation positive regulation of cell-cell adhesion positive regulation of lymphocyte activation positive regulation of cell activation cell adhesion cell-cell adhesion T cell activation multicellular organismal process regulation of cellular process regulation of leukocyte activation positive regulation of biological process regulation of cell activation positive regulation of leukocyte cell-cell adhesion lymphocyte activation leukocyte cell-cell adhesion leukocyte activation positive regulation of cell-cell adhesion positive regulation of lymphocyte activation positive regulation of cell activation cell adhesion cell-cell adhesion T cell activation positive regulation of leukocyte activation regulation of multicellular organismal process regulation of immune system process regulation of cell-cell adhesion positive regulation of immune system process positive regulation of cellular process regulation of biological process positive regulation of T cell activation positive regulation of cell adhesion regulation of cell adhesion cell activation biological regulation regulation of T cell activation immune system process lymphocyte costimulation regulation of leukocyte cell-cell adhesion positive regulation of multicellular organismal process cellular process T cell costimulation regulation of lymphocyte activation regulation of B cell activation B cell costimulation B cell activation positive regulation of B cell activation positive regulation of cell population proliferation positive regulation of B cell proliferation leukocyte proliferation regulation of B cell proliferation lymphocyte proliferation positive regulation of mononuclear cell proliferation regulation of lymphocyte proliferation regulation of leukocyte proliferation cell population proliferation positive regulation of lymphocyte proliferation B cell proliferation regulation of cell population proliferation mononuclear cell proliferation positive regulation of leukocyte proliferation regulation of mononuclear cell proliferation response to stimulus immune response adaptive immune response positive regulation of T cell proliferation T cell proliferation regulation of T cell proliferation cellular response to stimulus cell surface receptor signaling pathway signaling response to cytokine cytokine-mediated signaling pathway cell communication response to peptide cellular response to tumor necrosis factor response to chemical tumor necrosis factor-mediated signaling pathway cellular response to cytokine stimulus signal transduction response to tumor necrosis factor	cell periphery cellular anatomical structure plasma membrane membrane cell surface external side of plasma membrane side of membrane
B [auth H]	CB3s Fab heavy chain	-	response to stimulus immune response immune system process adaptive immune response	cell periphery cellular anatomical structure plasma membrane membrane protein-containing complex immunoglobulin complex extracellular region

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
C [auth R]	IPR015336	Tumour necrosis factor receptor 13C, TALL-1 binding domain	Domain
C [auth R]	IPR022338	Tumour necrosis factor receptor 13C	Family
C [auth R]	IPR043521	Tumor necrosis factor receptor 13C/17	Family
B [auth H]	IPR003597	Immunoglobulin C1-set	Domain
B [auth H]	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
B [auth H]	IPR036179	Immunoglobulin-like domain superfamily	Homologous Superfamily
B [auth H]	IPR013106	Immunoglobulin V-set domain	Domain
B [auth H]	IPR003599	Immunoglobulin domain subtype	Domain
B [auth H]	IPR007110	Immunoglobulin-like domain	Domain
B [auth H]	IPR050380	Immune Recognition and Response Modulators	Family
B [auth H]	IPR003006	Immunoglobulin/major histocompatibility complex, conserved site	Conserved Site

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
C [auth R]	Pharos: Q96RJ3	common variable immunodeficiency agammaglobulinemia Acquired Hypogammaglobulinemia immunodeficiency, common variable, 4 interstitial cystitis osteosarcoma tuberculosis medulloblastoma primitive neuroectodermal tumor ulcerative colitis B cell deficiency brain injury ductal breast carcinoma in situ nasopharyngeal carcinoma Sjogren syndrome

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.