Sec translocase

Another successful example of this dissection strategy is SecA, a 204 kDa ATPase from the Sec translocase. Unlike the proteasome, which is formed from relatively simple monomers, SecA is a dimer of very long chains (901 residues). 

The secretion machinery of Pseudomonas alcaligenes, the producer of Lipomax , an alkaline lipase for detergent compositions. The XcpQ protein forms a multimeric ring in the outer membrane. The Xcp T, U, V, and W proteins are thought to be involved in the gating of the pore, and proteins P, X, Y, and Z form a connection between the outer membrane pore and the inner membrane. XcpA, S, and P play a role in the processing of other Xcp proteins. Sec is inner membrane translocase. Ch is the periplasmic chaperone... 

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