SecA protein binds to the plasma membrane where it interacts with proOmpA to support translocation of proOmpA through the membrane. SecA protein achieves this translocation, in association with SecY protein, in an ATP dependent manner [1,2]. This domain represents the N-terminal ATP-dependent helicase domain, which is related to the Pfam:PF00270 [3].

1: Amino-terminal region of SecA is involved in the function of SecG for protein translocation into Escherichia coli membrane vesicles.\t Mori H, Sugiyama H, Yamanaka M, Sato K, Tagaya M, Mizushima S; J Biochem (Tokyo) 1998;124:122-129. PMID:9644254

2: SecA protein hydrolyzes ATP and is an essential component of the protein translocation ATPase of Escherichia coli. Lill R, Cunningham K, Brundage LA, Ito K, Oliver D, Wickner W; EMBO J 1989;8:961-966. PMID:2542029

3: Nucleotide control of interdomain interactions in the conformational reaction cycle of SecA. Hunt JF, Weinkauf S, Henry L, Fak JJ, McNicholas P, Oliver DB, Deisenhofer J; Science 2002;297:2018-2026. PMID:12242434