SEC62

The Sec61 complex is the central component of the protein translocation apparatus of the endoplasmic reticulum (ER) membrane. The protein encoded by this gene and SEC63 protein are found to be associated with ribosome-free SEC61 complex. It is speculated that Sec61-Sec62-Sec63 may perform post-translational protein translocation into the ER. The Sec61-Sec62-Sec63 complex might also perform the backward transport of ER proteins that are subject to the ubiquitin-proteasome-dependent degradation pathway. The encoded protein is an integral membrane protein located in the rough ER.

Full Name

SEC62 Homolog, Preprotein Translocation Factor

Function

Mediates post-translational transport of precursor polypeptides across endoplasmic reticulum (ER). Proposed to act as a targeting receptor for small presecretory proteins containing short and apolar signal peptides. Targets and properly positions newly synthesized presecretory proteins into the SEC61 channel-forming translocon complex, triggering channel opening for polypeptide translocation to the ER lumen.

Biological Process

Biological Process cotranslational protein targeting to membraneManual Assertion Based On ExperimentTAS:ProtInc
Biological Process post-translational protein targeting to endoplasmic reticulum membraneManual Assertion Based On ExperimentIMP:MGI
Biological Process post-translational protein targeting to membrane, translocationManual Assertion Based On ExperimentIMP:UniProtKB

Cellular Location

Endoplasmic reticulum membrane

Topology

Cytoplasmic: 1-196
Helical: 197-217
Lumenal: 218-234
Helical: 235-255
Cytoplasmic: 256-399