3V6O | pdb_00003v6o

Leptin Receptor-antibody complex

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)
E	d3v6oe2	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	C1 set domains (antibody constant domain-like)	automated matches	(Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
E	d3v6oe1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	automated matches	automated matches	(Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
F	d3v6of2	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	C1 set domains (antibody constant domain-like)	automated matches	(Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
F	d3v6of1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	automated matches	automated matches	(Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
C	d3v6oc_	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	automated matches	automated matches	(Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
D	d3v6od_	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	automated matches	automated matches	(Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
E	Defensin_2	e3v6oE1	A: alpha bundles	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: Defensin_2	ECOD (develop294)
F	Ig_2	e3v6oF3	A: alpha bundles	X: Subtilisin-like	H: Subtilisin-like	T: Subtilisin-like	F: Ig_2	ECOD (develop294)
C	Rrf2	e3v6oC1	A: alpha bundles	X: beta-Grasp	H: HTH	T: winged helix domain	F: Rrf2	ECOD (develop294)
D	Rrf2	e3v6oD1	A: alpha bundles	X: beta-Grasp	H: HTH	T: winged helix domain	F: Rrf2	ECOD (develop294)
A	VEGFR-1-like_Ig-like	e3v6oA3	A: alpha bundles	X: Fusion glycoprotein F2	H: MoeA-I/Ornithine decarboxylase-C/Reverse ferredoxin-like domain in RNA-polymerase	T: MoeA-I/Ornithine decarboxylase-C/Reverse ferredoxin-like domain in RNA-polymerase	F: VEGFR-1-like_Ig-like	ECOD (develop294)
B	Alpha-amylase	e3v6oB3	A: alpha bundles	X: Fusion glycoprotein F2	H: MoeA-I/Ornithine decarboxylase-C/Reverse ferredoxin-like domain in RNA-polymerase	T: MoeA-I/Ornithine decarboxylase-C/Reverse ferredoxin-like domain in RNA-polymerase	F: Alpha-amylase	ECOD (develop294)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
E	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
F	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
C	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
D	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
A	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
B	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
E, F	9F8 Fab	L-KAPPA	Mus musculus (house mouse)	IGKV6-1401, IGKJ401, IGKC01, IGKC02	V-DOMAIN V-KAPPA, C-DOMAIN C-KAPPA	IG	FAB-GAMMA-1_KAPPA	IMGT (202610-0)
C, D	9F8 Fab	VH-CH1	Mus musculus (house mouse)	IGHV2-6-501, IGHJ401, IGHG1*02	V-DOMAIN VH, C-DOMAIN CH1	IG	FAB-GAMMA-1_KAPPA	IMGT (202610-0)
A, B	LEPR (Leptin receptor)	2F-DOMAIN	Homo sapiens (human)	LEPR	F-LIKE-DOMAIN F-DOMAIN	RPI	2F-DOMAIN	IMGT (202610-0)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
E, F	Light Chain	IGKV6	Kappa	leptin receptor	SAbDab (2026-03-20)
C, D	Heavy Chain	IGHV2	-	leptin receptor	SAbDab (2026-03-20)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF18589	Obesity receptor immunoglobulin like domain (ObR_Ig)	Obesity receptor immunoglobulin like domain	This is the immunoglobulin-like domain (IGD) found in obesity receptors (ObR). ObR is a single membrane-spanning receptor belonging to the class I cytokine receptor family. All isoforms have an identical extracellular part consisting of six domains: ...	This is the immunoglobulin-like domain (IGD) found in obesity receptors (ObR). ObR is a single membrane-spanning receptor belonging to the class I cytokine receptor family. All isoforms have an identical extracellular part consisting of six domains: an N-terminal domain (NTD), two CRH domains (CRH1 and CRH2), an immunoglobulin-like domain (IGD), and two additional membrane-proximal fibronectin type III (FN III) domains. ObR activation depends on the CRH2, IGD, and FN III domains, however the CRH2 domain is the major leptin-binding determinant in the receptor. The IGD and membrane-proximal domains have no detectable affinity for the ligand, but are nonetheless indispensable for receptor activation. Deletion of the IGD results in a receptor with wild-type affinity for leptin, but completely devoid of biological activity [1-2].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
E, F	Monoclonal antibody 9F8 fab fragment Light chain	-	-	-
C, D	Monoclonal antibody 9F8 fab fragment Heavy chain	-	-	-
A, B	Leptin receptor	molecular transducer activity transmembrane signaling receptor activity signaling receptor activity cytokine receptor activity immune receptor activity protein binding binding cytokine binding leptin receptor activity peptide hormone binding hormone binding identical protein binding	cellular response to stimulus regulation of biological process regulation of cellular process cell surface receptor signaling pathway response to stimulus signaling biological regulation response to cytokine cytokine-mediated signaling pathway cell communication response to peptide response to chemical cellular process cellular response to cytokine stimulus cellular response to stimulus regulation of biological process regulation of cellular process cell surface receptor signaling pathway response to stimulus signaling biological regulation response to cytokine cytokine-mediated signaling pathway cell communication response to peptide response to chemical cellular process cellular response to cytokine stimulus signal transduction developmental process multicellular organism development multicellular organismal process anatomical structure development blood vessel morphogenesis tube development angiogenesis vasculature development circulatory system development anatomical structure morphogenesis tube morphogenesis anatomical structure formation involved in morphogenesis blood vessel development system development localization import into cell transport phagocytosis endocytosis establishment of localization vesicle-mediated transport cell surface receptor signaling pathway via STAT sexual reproduction reproductive process developmental growth growth animal organ development organ growth skeletal system development bone growth bone development multicellular organismal-level homeostasis homeostatic process energy homeostasis secondary alcohol metabolic process sterol metabolic process steroid metabolic process cholesterol metabolic process alcohol metabolic process small molecule metabolic process metabolic process primary metabolic process lipid metabolic process energy derivation by oxidation of organic compounds energy reserve metabolic process generation of precursor metabolites and energy cellular developmental process hemopoiesis cell activation cell development mononuclear cell differentiation lymphocyte activation lymphocyte differentiation leukocyte activation T cell activation immune system process cell differentiation T cell differentiation leukocyte differentiation cell population proliferation positive regulation of cell population proliferation regulation of cell population proliferation positive regulation of biological process positive regulation of cellular process adaptive thermogenesis regulation of cold-induced thermogenesis cold-induced thermogenesis temperature homeostasis positive regulation of cold-induced thermogenesis positive regulation of multicellular organismal process regulation of multicellular organismal process regulation of localization regulation of transport monosaccharide metabolic process carbohydrate metabolic process small molecule biosynthetic process carbohydrate biosynthetic process hexose metabolic process monosaccharide biosynthetic process gluconeogenesis hexose biosynthetic process biosynthetic process glucose metabolic process negative regulation of catabolic process catabolic process negative regulation of metabolic process autophagy negative regulation of biological process regulation of catabolic process regulation of autophagy negative regulation of autophagy negative regulation of cellular process process utilizing autophagic mechanism regulation of metabolic process negative regulation of small molecule metabolic process regulation of primary metabolic process negative regulation of gluconeogenesis regulation of small molecule metabolic process regulation of carbohydrate metabolic process regulation of glucose metabolic process negative regulation of carbohydrate metabolic process regulation of biosynthetic process negative regulation of biosynthetic process regulation of gluconeogenesis regulation of carbohydrate biosynthetic process cellular response to leptin stimulus cellular response to endogenous stimulus response to hormone response to leptin cellular response to hormone stimulus leptin-mediated signaling pathway response to endogenous stimulus cellular response to chemical stimulus system process circulatory system process vascular process in circulatory system vascular transport transport across blood-brain barrier regulation of behavior behavior feeding behavior regulation of feeding behavior tissue remodeling regulation of bone remodeling bone remodeling regulation of tissue remodeling chemical homeostasis glucose homeostasis carbohydrate homeostasis glycogen metabolic process glucan metabolic process polysaccharide metabolic process macromolecule metabolic process nervous system development neurogenesis gliogenesis glial cell proliferation	cell periphery cellular anatomical structure cell surface membrane plasma membrane external side of plasma membrane side of membrane basal part of cell basal plasma membrane plasma membrane region basolateral plasma membrane protein-containing complex receptor complex extracellular region

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR003531	Short hematopoietin receptor, family 1, conserved site	Conserved Site
A, B	IPR003529	Long hematopoietin receptor, Gp130 family 2, conserved site	Conserved Site
A, B	IPR010457	Immunoglobulin C2-set-like, ligand-binding	Domain
A, B	IPR041182	Leptin receptor, immunoglobulin-like domain	Domain
A, B	IPR003961	Fibronectin type III	Domain
A, B	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
A, B	IPR007110	Immunoglobulin-like domain	Domain
A, B	IPR036116	Fibronectin type III superfamily	Homologous Superfamily

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A, B	Pharos: P48357	obesity disorder obesity due to leptin receptor gene deficiency hyperglycemia type 2 diabetes mellitus breast carcinoma hyperinsulinism Diabetes Mellitus, Experimental hypogonadism primary immunodeficiency disease granulosa cell tumor diabetic autonomic neuropathy diabetic neuropathy inborn errors of metabolism kidney disease gestational diabetes obesity disorder obesity due to leptin receptor gene deficiency hyperglycemia type 2 diabetes mellitus breast carcinoma hyperinsulinism Diabetes Mellitus, Experimental hypogonadism primary immunodeficiency disease granulosa cell tumor diabetic autonomic neuropathy diabetic neuropathy inborn errors of metabolism kidney disease gestational diabetes glucose intolerance morbid obesity diabetes mellitus hypertensive disorder diabetic polyneuropathy female infertility breast cancer non-alcoholic fatty liver disease hyperlipidemia inborn carbohydrate metabolic disorder pancreatic ductal adenocarcinoma infertility disorder acquired generalized lipodystrophy pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia invasive ductal breast carcinoma acute myeloid leukemia pilocytic astrocytoma exocrine pancreatic carcinoma pituitary gland disease malignant colon neoplasm atopic eczema Gaucher disease congenital generalized lipodystrophy Sjogren syndrome monogenic obesity non-small cell lung carcinoma osteosarcoma pancreas disease pancreatic intraductal papillary-mucinous carcinoma ductal breast carcinoma in situ acquired metabolic disease peripheral nervous system disease Emery-Dreifuss muscular dystrophy pituitary cancer lung adenocarcinoma fatty liver disease malignant ependymoma atypical teratoid rhabdoid tumor primitive neuroectodermal tumor malignant pancreatic neoplasm maturity-onset diabetes of the young cutaneous lupus erythematosus tuberculosis ovarian cancer hypogonadotropic hypogonadism pancreatic intraductal papillary-mucinous neoplasm acquired partial lipodystrophy peripheral neuropathy large cell medulloblastoma familial hyperlipidemia lung cancer malignant glioma psoriasis gastric carcinoma glioblastoma respiratory tract infectious disease medulloblastoma cystic fibrosis

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.