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Function
Activin A or inhibitin β chain A (ActA) is a member of the TGF-β superfamily that inhibits the proliferation of breast cancer cells. Activin interacts with activin receptors to induce phosphorylation of intracellular signalling molecules which regulate the transcription of many genes in a cell- and tissue-specific manner[1].
Relevance
There is a strong overexpression of activin A in inflammatory bowel disease[2]. Activin A plays an important role in chronic rhinosinusitis inflammation.
Structural highlights
Activin is synthesyzed as a large precursor and its pro domain is cleaved proteolitically releasing a mature domain[3].
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3D structures of activin A
Updated on 06-May-2020
5hlz, 5hly - hActA - human
2arv - hActA mature domain residues 311-426
1nys, 1nyu, 1s4y - hActA mature domain + Acvr2B LBD
2b0u, 2arp, 2p6a - hActA mature domain + follistatin
3b4v - hActA mature domain + follistatin-like 3
References
proteopedia link