UniProt functional annotation for P0AG96

UniProt code: P0AG96.

Organism: Escherichia coli (strain K12).
Taxonomy: Bacteria; Proteobacteria; Gammaproteobacteria; Enterobacteriales; Enterobacteriaceae; Escherichia.
Function: Essential subunit of the protein translocation channel SecYEG. Clamps together the 2 halves of SecY. May contact the channel plug during translocation. Overexpression of some hybrid proteins has been thought to jam the protein secretion apparatus resulting in cell death; while this may be true it also results in FtsH-mediated degradation of SecY.
Subunit: Part of the essential Sec protein translocation complex which comprises SecA, SecYEG and auxiliary proteins SecDF-YajC and YidC/OxaA. Heterotrimer consisting of SecY, SecE and SecG subunits. The heterotrimers can form oligomers, although 1 heterotrimer is thought to be able to translocate proteins. The channel interacts with SecA via subunit SecY. SecE might contact ribosomal protein L23 and/or L29 when the translocation complex is docked with the ribosome.
Subcellular location: Cell inner membrane; Multi-pass membrane protein.
Ptm: Degraded by FtsH when the SecYEG complex is jammed or upon treatment with antibiotics that block translation elongation such as chloramphenicol.
Disruption phenotype: Essential; deletion experiments lead to loss of the SecYEG tranlocation channel. Leads to loss of translocation of lipoproteins Lpp and BRP (PubMed:15140892) and accumulation of signal peptidase I (lepB) in a soluble fraction (PubMed:21778229).
Similarity: Belongs to the SecE/SEC61-gamma family.

Annotations taken from UniProtKB at the EBI.