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Protein Page:
FGF8 (human)

FGF8 Plays an important role in the regulation of embryonic development, cell proliferation, cell differentiation and cell migration. Required for normal brain, eye, ear and limb development during embryogenesis. Required for normal development of the gonadotropin-releasing hormone (GnRH) neuronal system. Defects in FGF8 are the cause of Kallmann syndrome type 6 (KAL6). Kallmann syndrome is a disorder that associates hypogonadotropic hypogonadism and anosmia. Anosmia or hyposmia is related to the absence or hypoplasia of the olfactory bulbs and tracts. Hypogonadism is due to deficiency in gonadotropin-releasing hormone and probably results from a failure of embryonic migration of gonadotropin-releasing hormone- synthesizing neurons. In some patients other developmental anomalies can be present, which include renal agenesis, cleft lip and/or palate, selective tooth agenesis, and bimanual synkinesis. In some cases anosmia may be absent or inconspicuous. Defects in FGF8 are a cause of idiopathic hypogonadotropic hypogonadism (IHH). IHH is defined as a deficiency of the pituitary secretion of follicle-stimulating hormone and luteinizing hormone, which results in the impairment of pubertal maturation and of reproductive function. Belongs to the heparin-binding growth factors family. 4 isoforms of the human protein are produced by alternative splicing. Note: This description may include information from UniProtKB.
Protein type: Secreted, signal peptide; Secreted; Cytokine
Chromosomal Location of Human Ortholog: 10q24
Cellular Component: extracellular space; extracellular region; external side of plasma membrane
Molecular Function: growth factor activity; type 2 fibroblast growth factor receptor binding; chemoattractant activity; fibroblast growth factor receptor binding; type 1 fibroblast growth factor receptor binding
Biological Process: gonad development; nerve growth factor receptor signaling pathway; apoptosis; cell proliferation in forebrain; adrenocorticotropin hormone secreting cell differentiation; motor axon guidance; forebrain dorsal/ventral pattern formation; thyroid stimulating hormone secreting cell differentiation; gastrulation; Wnt receptor signaling pathway through beta-catenin; mesodermal cell migration; embryonic hindlimb morphogenesis; response to organic cyclic substance; odontogenesis; BMP signaling pathway; positive chemotaxis; induction of an organ; positive regulation of cell proliferation; male genitalia development; thyroid gland development; mesonephros development; pallium development; negative regulation of neuron apoptosis; heart looping; otic vesicle formation; regulation of odontogenesis of dentine-containing teeth; negative regulation of cardiac muscle development; response to drug; epidermal growth factor receptor signaling pathway; anatomical structure morphogenesis; phosphoinositide-mediated signaling; fibroblast growth factor receptor signaling pathway; pharyngeal system development; positive regulation of mitosis; neural plate morphogenesis; MAPKKK cascade; subpallium development; forebrain morphogenesis; dorsal/ventral axon guidance; positive regulation of organ growth; patterning of blood vessels; forebrain neuron development; ureteric bud branching; midbrain-hindbrain boundary development; insulin receptor signaling pathway; innate immune response; blood vessel remodeling; response to oxidative stress; metanephros development
Disease: Hypogonadotropic Hypogonadism 6 With Or Without Anosmia
Reference #:  P55075 (UniProtKB)
Alt. Names/Synonyms: AIGF; Androgen-induced growth factor; FGF-8; FGF8; Fibroblast growth factor 8; fibroblast growth factor 8 (androgen-induced); HBGF-8; Heparin-binding growth factor 8; KAL6; MGC149376
Gene Symbols: FGF8
Molecular weight: 26,525 Da
Basal Isoelectric point: 10.44  Predict pI for various phosphorylation states
Select Structure to View Below


Protein Structure Not Found.

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Modification Sites and Domains  

Modification Sites in Parent Protein, Orthologs, and Isoforms  

Show Multiple Sequence Alignment


SS: The number of records in which this modification site was determined using site-specific methods. SS methods include amino acid sequencing, site-directed mutagenesis, modification site-specific antibodies, specific MS strategies, etc.


MS: The number of records in which this modification site was assigned using ONLY proteomic discovery-mode mass spectrometry.


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  FGF8 iso3  
  FGF8 iso4  

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