Part of the accessory SecA2/SecY2 system specifically required to export SraP, a serine-rich repeat cell wall protein encoded upstream in the same operon. ATP + H2O + cellular proteinSide 1 = ADP + phosphate + cellular proteinSide 2. Monomer and homodimer (Potential). Part of the accessory SecA2/SecY2 protein translocation apparatus required to export cell wall protein SraP. Distribution is 50-50. No effect on cell growth, significantly reduces export of the cell wall protein SrpA. The small amount that is exported seems to be glycosylated normally. Belongs to the SecA family.