Protein-export membrane protein SecG - P0AG99 (SECG_ECOLI)


Protein Feature View of PDB entries mapped to a UniProtKB sequence  

  • Number of PDB entries for P0AG99: 6
Subunit of the protein translocation channel SecYEG. 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. Treatment with antibiotics that block translation elongation such as chloramphenicol also leads to degradation of SecY and SecE but not SecG. UniProt
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Subunit Structure
Component of the Sec protein translocase complex. 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 SecDF-YidC-YajC translocase forms a supercomplex with SecYEG, called the holo-translocon (HTL) (PubMed:27435098). The stoichiometry of the super complex may be SecYEG:YidC:SecDF 4:3:1, YajC is in the reconstituted complex (with SecDF) but as no antibody is available it could not be quantified (PubMed:27435098). SecG probably contacts ribosomal protein L23 and/or L29 when the translocation complex is docked with the ribosome. UniProt
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  • Secstruc: Secondary structure projected from representative PDB entries onto the UniProt sequence.
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