Annotations: 9YXD

Crystal structure of recombinant human follicle stimulating hormone in complex with an anti-FSH alpha Fab

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
SAbDab Antibody 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)
B	SCOP2B Superfamily	Cystine-knot cytokines	8032460	3000846	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Cystine-knot cytokines	8038799	3000846	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	Sel1	e9yxdB1	A: alpha arrays	X: Hypothetical protein YqbG-like	H: Hypothetical protein YqbG-like	T: alpha/beta-Hydrolases	F: Sel1	ECOD (v295.2)
E [auth K]	RVP	e9yxdK1	A: alpha arrays	X: Hypothetical protein YqbG-like	H: Hypothetical protein YqbG-like	T: alpha/beta-Hydrolases	F: RVP	ECOD (v295.2)
A	Sel1	e9yxdA1	A: alpha arrays	X: Hypothetical protein YqbG-like	H: Hypothetical protein YqbG-like	T: alpha/beta-Hydrolases	F: Sel1	ECOD (v295.2)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
E [auth K]	Heavy Chain	IGHV1	-	-	SAbDab (2026-08-21)
D	Heavy Chain	IGHV1	-	glycoprotein hormones alpha chain \| follitropin subunit beta	SAbDab (2026-08-21)
C	Light Chain	IGKV3	Kappa	glycoprotein hormones alpha chain \| follitropin subunit beta	SAbDab (2026-08-21)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
B	Follitropin subunit beta	hormone activity molecular function activator activity molecular function regulator activity signaling receptor regulator activity follicle-stimulating hormone 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 sexual reproduction reproductive process multicellular organismal reproductive process female gamete generation gamete generation 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 sexual reproduction reproductive process multicellular organismal reproductive process female gamete generation gamete generation developmental process multicellular organismal process gonad development reproductive system development female gonad development sex differentiation animal organ development female sex differentiation development of primary female sexual characteristics developmental process involved in reproduction multicellular organism development development of primary sexual characteristics anatomical structure development reproductive structure development ovarian follicle development animal gross anatomical part developmental process system development multi-multicellular organism process female pregnancy multi-organism reproductive process positive regulation of locomotion regulation of cell motility positive regulation of cell migration regulation of locomotion positive regulation of cell motility regulation of cell migration cell migration cell motility locomotion regulation of steroid biosynthetic process steroid metabolic process regulation of lipid metabolic process lipid biosynthetic process regulation of primary metabolic process positive regulation of metabolic process positive regulation of biosynthetic process positive regulation of lipid metabolic process steroid biosynthetic process regulation of biosynthetic process regulation of steroid metabolic process primary metabolic process positive regulation of steroid biosynthetic process biosynthetic process positive regulation of lipid biosynthetic process positive regulation of steroid metabolic process metabolic process regulation of lipid biosynthetic process regulation of metabolic process lipid metabolic process cellular response to stimulus response to stimulus signaling G protein-coupled receptor signaling pathway signal transduction cell communication ovulation cycle process ovulation cycle rhythmic process follicle-stimulating hormone signaling pathway positive regulation of DNA-templated transcription RNA metabolic process positive regulation of macromolecule biosynthetic process nucleobase-containing compound metabolic process RNA biosynthetic process nucleic acid biosynthetic process DNA-templated transcription regulation of RNA metabolic process transcription by RNA polymerase II positive regulation of macromolecule metabolic process regulation of nucleobase-containing compound metabolic process regulation of RNA biosynthetic process regulation of transcription by RNA polymerase II regulation of macromolecule metabolic process positive regulation of transcription by RNA polymerase II nucleobase-containing compound biosynthetic process gene expression macromolecule biosynthetic process nucleic acid metabolic process positive regulation of RNA metabolic process regulation of gene expression positive regulation of RNA biosynthetic process regulation of macromolecule biosynthetic process macromolecule metabolic process regulation of DNA-templated transcription cellular response to growth factor stimulus cell surface receptor protein serine/threonine kinase signaling pathway cell surface receptor signaling pathway cellular response to transforming growth factor beta stimulus response to endogenous stimulus cellular response to endogenous stimulus response to transforming growth factor beta transforming growth factor beta receptor signaling pathway response to growth factor transforming growth factor beta receptor superfamily signaling pathway enzyme-linked receptor protein signaling pathway ketone metabolic process C21-steroid hormone metabolic process progesterone metabolic process small molecule metabolic process regulation of biological quality hormone biosynthetic process steroid hormone biosynthetic process olefinic compound biosynthetic process small molecule biosynthetic process progesterone biosynthetic process regulation of hormone levels C21-steroid hormone biosynthetic process hormone metabolic process olefinic compound metabolic process ketone biosynthetic process	cellular anatomical structure extracellular region intracellular anatomical structure cytoplasm protein-containing complex follicle-stimulating hormone complex extracellular protein-containing complex pituitary gonadotropin complex
E [auth K]	Ig-like domain-containing protein	-	-	-
D	Fab heavy chain	-	-	-
C	Fab light chain	-	-	-
A	Glycoprotein hormones alpha chain	hormone activity molecular function activator activity molecular function regulator activity signaling receptor regulator activity follicle-stimulating hormone 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 positive regulation of locomotion regulation of cell motility positive regulation of cell migration regulation of locomotion positive regulation of cell motility 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 positive regulation of locomotion regulation of cell motility positive regulation of cell migration regulation of locomotion positive regulation of cell motility regulation of cell migration cell migration cell motility locomotion cellular response to stimulus response to stimulus signaling response to endogenous stimulus hormone-mediated signaling pathway cell communication cellular response to endogenous stimulus cellular response to chemical stimulus response to hormone response to chemical signal transduction cellular response to hormone stimulus regulation of signaling regulation of signaling receptor activity regulation of signal transduction regulation of molecular function regulation of response to stimulus regulation of cell communication regulation of steroid biosynthetic process steroid metabolic process regulation of lipid metabolic process lipid biosynthetic process regulation of primary metabolic process positive regulation of metabolic process positive regulation of biosynthetic process positive regulation of lipid metabolic process steroid biosynthetic process regulation of biosynthetic process regulation of steroid metabolic process primary metabolic process positive regulation of steroid biosynthetic process biosynthetic process positive regulation of lipid biosynthetic process positive regulation of steroid metabolic process metabolic process regulation of lipid biosynthetic process regulation of metabolic process lipid metabolic process G protein-coupled receptor signaling pathway ovulation cycle process multicellular organismal process reproductive process sex differentiation development of primary female sexual characteristics developmental process involved in reproduction ovulation cycle multicellular organism development development of primary sexual characteristics anatomical structure development reproductive structure development ovarian follicle development system development rhythmic process developmental process gonad development reproductive system development female gonad development multicellular organismal reproductive process animal organ development female sex differentiation follicle-stimulating hormone signaling pathway animal gross anatomical part developmental process positive regulation of DNA-templated transcription RNA metabolic process positive regulation of macromolecule biosynthetic process nucleobase-containing compound metabolic process RNA biosynthetic process nucleic acid biosynthetic process DNA-templated transcription regulation of RNA metabolic process transcription by RNA polymerase II positive regulation of macromolecule metabolic process regulation of nucleobase-containing compound metabolic process regulation of RNA biosynthetic process regulation of transcription by RNA polymerase II regulation of macromolecule metabolic process positive regulation of transcription by RNA polymerase II nucleobase-containing compound biosynthetic process gene expression macromolecule biosynthetic process nucleic acid metabolic process positive regulation of RNA metabolic process regulation of gene expression positive regulation of RNA biosynthetic process regulation of macromolecule biosynthetic process macromolecule metabolic process regulation of DNA-templated transcription	membrane-bounded organelle intracellular anatomical structure Golgi apparatus membrane-enclosed lumen intracellular membrane-bounded organelle endomembrane system intracellular organelle lumen Golgi lumen intracellular organelle cellular anatomical structure organelle lumen organelle cytoplasm extracellular region membrane-bounded organelle intracellular anatomical structure Golgi apparatus membrane-enclosed lumen intracellular membrane-bounded organelle endomembrane system intracellular organelle lumen Golgi lumen intracellular organelle cellular anatomical structure organelle lumen organelle cytoplasm extracellular region protein-containing complex follicle-stimulating hormone complex extracellular protein-containing complex pituitary gonadotropin complex

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
B	IPR001545	Gonadotropin, beta subunit	Family
B	IPR006208	Glycoprotein hormone subunit beta	Domain
B	IPR018245	Gonadotropin, beta subunit, conserved site	Conserved Site
B	IPR029034	Cystine-knot cytokine	Homologous Superfamily
A	IPR000476	Glycoprotein hormone alpha chain	Family
A	IPR029034	Cystine-knot cytokine	Homologous Superfamily

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
B	: P01225	hypogonadotropic hypogonadism 24 without anosmia lateral medullary syndrome oligospermia alcohol abuse amenorrhea hypogonadism Fever male infertility polycystic ovary syndrome female infertility Klinefelter syndrome endometriosis hypogonadotropic hypogonadism
A	: P01215	oligospermia ovarian disease uterine disease hemiplegia atrial fibrillation ovarian cancer psoriasis thyroid cancer, nonmedullary, 2 adrenal gland disease Disease Exacerbation lung cancer spina bifida lung carcinoma osteosarcoma pituitary cancer oligospermia ovarian disease uterine disease hemiplegia atrial fibrillation ovarian cancer psoriasis thyroid cancer, nonmedullary, 2 adrenal gland disease Disease Exacerbation lung cancer spina bifida lung carcinoma osteosarcoma pituitary cancer interstitial lung disease

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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.