| Function | Multifunctional regulatory protein whose primary function is to antagonize members of the transforming growth factor beta (TGF-beta) superfamily including activin, myostatin, GDF11 or bone morphogenetic proteins (BMPs). Mechanistically, binds to these ligands in the extracellular space, blocking their type II receptor-binding site to inhibit downstream signaling. Plays an essential role in muscle fiber formation and growth both by preventing the repressive effects of myostatin and through SMAD3/AKT/mTOR signaling independently of myostatin. Also promotes neural differentiation by antagonizing the action BMP4. Acts as a specific inhibitor of the biosynthesis and secretion of pituitary follicle stimulating hormone (FSH) by sequestering activin A/INHBA. On the other hand, translocates into the nucleus where it down-regulates rRNA synthesis and ribosome biogenesis to maintain cellular energy homeostasis by binding to rDNA. |
| Protein Name | FollistatinFsActivin-Binding Protein |
| Database Links | Reactome: R-HSA-2473224 |
| Cellular Localisation | SecretedNucleusNucleolus |
| Alternative Protein Names | Follistatin proteinFs proteinActivin-Binding Protein proteinFST protein |
Information sourced from Uniprot.org
