Sec-independent membrane protein translocase, essential for [[protein|5F24258282F3166B7696B9E9ABC1706E4D06C944]] activity at stage III, involved in the assembly of the [[protein|00BDD4E3370DB3A9F4D75FE265A2A8DF05185CCC]]-[[protein|3282D2C25468776881778006F182FCF322C4821D]] complex