The SecA protein is a cell membrane associated subunit of the eubacterial Sec or Type II secretory pathway, a system which is responsible for the secretion of proteins through the cell membrane. Within this system SecA has the functional properties of an ATPase and is required to empower the movement of the protein substrate across the translocon channel.
The translocase system encompasses an array of proteins which are functionally centred on the translocon channel which mediates the export of proteins across the bacterial cytoplasmic membrane and the insertion of membrane proteins into it. Regardless of the chosen targeting route, preprotein eventually reach the cytoplasmic membrane and make contact with the translocase. This translocase consists out of the peripheral membrane ATPase SecA and the translocon membrane channel composed out of the proteins SecY, SecE, and SecG. Conformational changes within the SecA structure are the effect of its ATP-hydrolyzing behaviour and possibly lead to the stepwise export of the preprotein substrate through the SecYEG channel.
Usage examples of "seca".
I see monstrosities, dear Seca, Seca, and it is not easy for me to keep myself close to my great work.
A sad marriage has taken place in our Rome, Seca, between superb taste and grossest vulgarity.
Do you remember, Seca, that in one letter I said they are going to drive us to what we shrink from even imagining?
The good side of me, which you, dear Seca, have tried to nourish, came forward.
He gave names to the Punta Seca, the Ysla Ysabeta, the Ysla Tramontana, the Punta Llana, Punta Sara, assuming them to be known, although he has said nothing of them or of any of them.
Laguna Seca track, skiing down the most treacherous slopes you can find anywhere, pushing a goddamned ten-pound Ultra-lite plane as high and as fast as it will go on a teacup of gas.
With luck I ended up fifth and the next race at Laguna Seca a good third.
Sabana Seca listening post in Puerto Rico and picked the first of four highly experienced chiefs for the job.
His little single-width mobile home was located on the east edge of Laguna Seca Mesa, and Desboti was standing in its door.
His little  single-width mobile home was located on the east edge of Laguna Seca Mesa, and Desboti was standing in its door.
At one point he threatened to show photographs of Mini-Coopers beating factory Corvettes at Laguna Seca.
Arnold flew down to the Navy's Sabana Seca listening post in Puerto Rico and picked the first of four highly experienced chiefs for the job.