5VAQ | pdb_00005vaq

Crystal Structure of Beta-Klotho in Complex with FGF21CT

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
SAbDab Antibody Annotation
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Pharos: Disease Associations

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	(Trans)glycosidases	8065802	3000313	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B	Pkinase	e5vaqB1	A: alpha bundles	X: Protein kinase/SAICAR synthase/ATP-grasp	H: Protein kinase/SAICAR synthase/ATP-grasp	T: Protein kinase	F: Pkinase	ECOD (develop294)
A	SBP_bac_1	e5vaqA1	A: alpha bundles	X: Periplasmic binding protein-like II	H: Rubredoxin-related	T: Tetrapyrrole methylase C-terminal domain	F: SBP_bac_1	ECOD (develop294)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.20.20.80	Alpha Beta	Alpha-Beta Barrel	TIM Barrel	Glycosidases	CATH (utative)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
B	Heavy Chain	IGHV1	-	beta-klotho	SAbDab (2026-03-20)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF00232	Glycosyl hydrolase family 1 (Glyco_hydro_1)	Glycosyl hydrolase family 1		Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
C	Fibroblast growth factor 21	protein binding binding signaling receptor binding fibroblast growth factor receptor binding growth factor receptor binding molecular function activator activity molecular function regulator activity signaling receptor regulator activity growth factor activity receptor ligand activity signaling receptor activator activity	regulation of biological process cell population proliferation regulation of cellular process positive regulation of cell population proliferation regulation of cell population proliferation biological regulation positive regulation of biological process cellular process positive regulation of cellular process response to fibroblast growth factor cellular response to stimulus positive regulation of cell communication cellular response to growth factor stimulus positive regulation of signal transduction regulation of biological process cell population proliferation regulation of cellular process positive regulation of cell population proliferation regulation of cell population proliferation biological regulation positive regulation of biological process cellular process positive regulation of cellular process response to fibroblast growth factor cellular response to stimulus positive regulation of cell communication cellular response to growth factor stimulus positive regulation of signal transduction response to stimulus signaling regulation of signal transduction cell surface receptor protein tyrosine kinase signaling pathway intracellular signal transduction cell communication positive regulation of response to stimulus cellular response to endogenous stimulus regulation of intracellular signal transduction intracellular signaling cassette signal transduction enzyme-linked receptor protein signaling pathway regulation of signaling positive regulation of MAPKKK cascade by fibroblast growth factor receptor signaling pathway cell surface receptor signaling pathway response to endogenous stimulus positive regulation of MAPK cascade positive regulation of intracellular signal transduction regulation of MAPK cascade regulation of response to stimulus fibroblast growth factor receptor signaling pathway MAPK cascade regulation of cell communication response to growth factor cellular response to fibroblast growth factor stimulus positive regulation of signaling multicellular organismal process homeostatic process adaptive thermogenesis multicellular organismal-level homeostasis 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 developmental process neurogenesis multicellular organism development cellular developmental process cell differentiation anatomical structure development nervous system development system development positive regulation of ERK1 and ERK2 cascade ERK1 and ERK2 cascade regulation of ERK1 and ERK2 cascade regulation of low-density lipoprotein particle clearance plasma lipoprotein particle clearance regulation of lipoprotein particle clearance low-density lipoprotein particle clearance regulation of plasma lipoprotein particle levels cell-cell signaling regulation of localization import into cell hexose transmembrane transport regulation of D-glucose import across plasma membrane transport carbohydrate import across plasma membrane carbohydrate transport positive regulation of D-glucose transmembrane transport hexose import across plasma membrane localization positive regulation of transmembrane transport positive regulation of D-glucose import across plasma membrane regulation of transport import across plasma membrane establishment of localization transmembrane transport regulation of transmembrane transport D-glucose import across plasma membrane positive regulation of transport D-glucose transmembrane transport regulation of D-glucose transmembrane transport monosaccharide transmembrane transport carbohydrate transmembrane transport regulation of cell motility regulation of locomotion regulation of cell migration cell migration cell motility locomotion	cellular anatomical structure extracellular region intracellular anatomical structure cytoplasm extracellular space
B	Nb914	-	-	-
A	Beta-klotho	fibroblast growth factor binding protein binding binding growth factor binding signaling receptor binding fibroblast growth factor receptor binding growth factor receptor binding hydrolase activity, acting on glycosyl bonds hydrolase activity, hydrolyzing O-glycosyl compounds hydrolase activity catalytic activity	regulation of biological process cell population proliferation regulation of cellular process positive regulation of cell population proliferation regulation of cell population proliferation biological regulation positive regulation of biological process cellular process positive regulation of cellular process response to fibroblast growth factor cellular response to stimulus positive regulation of cell communication cellular response to growth factor stimulus positive regulation of signal transduction regulation of biological process cell population proliferation regulation of cellular process positive regulation of cell population proliferation regulation of cell population proliferation biological regulation positive regulation of biological process cellular process positive regulation of cellular process response to fibroblast growth factor cellular response to stimulus positive regulation of cell communication cellular response to growth factor stimulus positive regulation of signal transduction response to stimulus signaling regulation of signal transduction cell surface receptor protein tyrosine kinase signaling pathway intracellular signal transduction cell communication positive regulation of response to stimulus cellular response to endogenous stimulus regulation of intracellular signal transduction intracellular signaling cassette signal transduction enzyme-linked receptor protein signaling pathway regulation of signaling positive regulation of MAPKKK cascade by fibroblast growth factor receptor signaling pathway cell surface receptor signaling pathway response to endogenous stimulus positive regulation of MAPK cascade positive regulation of intracellular signal transduction regulation of MAPK cascade regulation of response to stimulus fibroblast growth factor receptor signaling pathway MAPK cascade regulation of cell communication response to growth factor cellular response to fibroblast growth factor stimulus positive regulation of signaling carbohydrate metabolic process primary metabolic process metabolic process	cell periphery cellular anatomical structure plasma membrane membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
C	IPR035444	Fibroblast growth factor 15/19/21	Family
C	IPR002209	Fibroblast growth factor family	Family
C	IPR008996	Cytokine IL1/FGF	Homologous Superfamily
A	IPR001360	Glycoside hydrolase family 1	Family
A	IPR017853	Glycoside hydrolase superfamily	Homologous Superfamily

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
C	Pharos: Q9NSA1	non-alcoholic fatty liver disease obesity disorder type 2 diabetes mellitus middle cerebral artery infarction Diabetes Mellitus, Experimental psoriasis Crohn disease inborn carbohydrate metabolic disorder attention deficit hyperactivity disorder, inattentive type cholelithiasis dental caries fatty liver disease inflammatory bowel disease type 1 diabetes mellitus Behcet disease non-alcoholic fatty liver disease obesity disorder type 2 diabetes mellitus middle cerebral artery infarction Diabetes Mellitus, Experimental psoriasis Crohn disease inborn carbohydrate metabolic disorder attention deficit hyperactivity disorder, inattentive type cholelithiasis dental caries fatty liver disease inflammatory bowel disease type 1 diabetes mellitus Behcet disease colorectal cancer gallbladder disease
A	Pharos: Q86Z14	atopic eczema ductal breast carcinoma in situ invasive ductal breast carcinoma pancreatic ductal adenocarcinoma pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia breast carcinoma Emery-Dreifuss muscular dystrophy malignant pancreatic neoplasm pancreatic intraductal papillary-mucinous carcinoma peripheral arterial disease breast fibroadenoma herpes zoster non-small cell lung carcinoma pancreatic intraductal papillary-mucinous neoplasm ulcerative colitis

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.