secA, Protein translocase subunit SecA
Also Known as
SECA_BACSU, secA, div+
Part of the Sec protein translocase complex. Interacts with the SecYEG preprotein conducting channel. Has a central role in coupling the hydrolysis of ATP to the transfer of proteins into and across the cell membrane, serving as an ATP-driven molecular motor driving the stepwise translocation of polypeptide chains across the membrane. Part of the essential Sec protein translocation apparatus which comprises SecA, SecYEG and auxiliary proteins SecDF. Other proteins may be involved. Monomer and many different homodimers can be isolated (PubMed:16989859), some of which are not formed in the presence of a synthetic signal peptide. A single SecA monomer interacts with SecY in the channel.