5WI9 | pdb_00005wi9

Crystal structure of KL with an agonist Fab

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 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)
F	d5wi9f_	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	automated matches	(Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
D [auth H]	d5wi9h_	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	automated matches	(Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
E	d5wi9e1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	automated matches	(Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
E	d5wi9e2	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	C1 set domains (antibody constant domain-like)	automated matches	(Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
C [auth L]	d5wi9l1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	automated matches	(Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
C [auth L]	d5wi9l2	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	C1 set domains (antibody constant domain-like)	automated matches	(Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
B	SCOP2B Superfamily	(Trans)glycosidases	8065802	3000313	SCOP2B (2022-06-29)
A	SCOP2 Family	Family 1 of glycosyl hydrolase	8065801	4003184	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	(Trans)glycosidases	8065802	3000313	SCOP2 (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
F		e5wi9F1	A: L-aspartase middle domain-like	X: gp11/gp12 receptor-binding domain	H: gp11/gp12 receptor-binding domain	T: Chlorophyllase2	F:	ECOD (20:10:01)
D [auth H]		e5wi9H1	A: L-aspartase middle domain-like	X: gp11/gp12 receptor-binding domain	H: gp11/gp12 receptor-binding domain	T: Abhydrolase_6	F:	ECOD (20:10:01)
E		e5wi9E1	A: L-aspartase middle domain-like	X: gp11/gp12 receptor-binding domain	H: gp11/gp12 receptor-binding domain	T: Abhydrolase_6	F:	ECOD (20:10:01)
C [auth L]		e5wi9L1	A: L-aspartase middle domain-like	X: gp11/gp12 receptor-binding domain	H: gp11/gp12 receptor-binding domain	T: Chlorophyllase2	F:	ECOD (20:10:01)
B		e5wi9B1	A: L-aspartase middle domain-like	X: gp11/gp12 receptor-binding domain	H: gp11/gp12 receptor-binding domain	T: Chlorophyllase2	F:	ECOD (20:10:01)
A		e5wi9A1	A: L-aspartase middle domain-like	X: gp11/gp12 receptor-binding domain	H: gp11/gp12 receptor-binding domain	T: Abhydrolase_6	F:	ECOD (20:10:01)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
F	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)
D [auth H]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)
E	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
C [auth L]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
B	3.20.20.80	Alpha Beta	Alpha-Beta Barrel	TIM Barrel	Glycosidases	CATH (utative)
A	3.20.20.80	Alpha Beta	Alpha-Beta Barrel	TIM Barrel	Glycosidases	CATH (utative)

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
D [auth H], F	Fab 39F7	VH-CH1	Homo sapiens (human)	IGHV3-3301, IGHV3-3304, IGHJ601, IGHG101, IGHG102, IGHG104, IGHG1*05	V-DOMAIN VH, C-DOMAIN CH1	IG	FAB-GAMMA-1_KAPPA	IMGT (202609-0)
C [auth L], E	Fab 39F7	L-KAPPA	Homo sapiens (human)	IGKV3-2001, IGKJ401, IGKJ402, IGKC01	V-DOMAIN V-KAPPA, C-DOMAIN C-KAPPA	IG	FAB-GAMMA-1_KAPPA	IMGT (202609-0)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
D [auth H], F	Heavy Chain	IGHV3	-	beta-klotho	SAbDab (2026-03-13)
C [auth L], E	Light Chain	IGKV3	Kappa	beta-klotho	SAbDab (2026-03-13)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	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
D [auth H], F	39F7 Fab heavy chain	-	-	-
C [auth L], E	39F7 Fab light chain	-	-	-
A, B	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
A, B	IPR001360	Glycoside hydrolase family 1	Family
A, B	IPR017853	Glycoside hydrolase superfamily	Homologous Superfamily

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A, B	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.