SecY
Complex
Protein-Conducting
Channel
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Transmembrane protein responsible for transporting
polypeptides across cell membranes in prokaryotes.
For more information see
Biochemistry Online: Chapter 2D - PROTEIN FOLDING/STABILITY IN VIVO AND IN VITRO
Wireframe
α subunit - red
- Forms the pore through which proteins pass
β subunit - blue
γ subunit - yellow
- Holds α
subunit in proper conformation
Select all subunits
Cartoon and Pore Ring (White)
- Narrowest point of channel. Isoleucine,
valine, and leucine residues. (After rotation, rotate to view down y axis for a better view)
Pore Ring and Plug(Green)
- Closes the channel to polypeptides and small molecules. Upon binding of the signal
sequence of a polypeptide, the pore plug moves and provides access through the pore ring.
Dot surface and Wireframe