Principal Names: ROPN1L; Ropporin-1 like; ASP; AKAP-associated sperm protein; Official Gene Symbol: ROPN1L Gene ID: 83853 (human) Gene Map Locus: 5p15.2 (human)
AKAPs act as scaffolding proteins co-ordinating phosphotase/kinase signaling at the cytoskeleton. They interact with PKAs and anchor them to specific sub-cellular compartments and participate in multiple cellular processes including growth, metabolism and differentiation. ASP, a 26KDa protein, is a novel AKAP-interacting protein. It interacts with the amphipathic helix of AKAP3 and facilitates AKAP3-PKA interactions. It consists of a conserved N-terminal AKAP-binding domain and a central cysteine-rich Fz domain. It is specifically expressed in the sperms and might play a significant role in sperm motily and also facilitate cytoskeletal reorganization during spermiogenesis.
1. Carr,D.W., Fujita,A., Stentz,C.L., Liberty,G.A., Olson,G.E. and Narumiya,S. Identification of sperm-specific proteins that interact with A-kinase anchoring proteins in a manner similar to the type II regulatory subunit of PKA. J. Biol. Chem. 276 (20), 17332-17338 (2001).
2. Anway,M.D., Ravindranath,N., Dym,M. and Griswold,M.D. Identification of a murine testis complementary DNA encoding a homolog to human A-kinase anchoring protein-associated sperm protein. Biol. Reprod. 66 (6), 1755-1761 (2002).