SsrA Tagging of Escherichia coli SecM at Its Translation Arrest Sequence

نویسندگان
چکیده

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Stop codons preceded by rare arginine codons are efficient determinants of SsrA tagging in Escherichia coli.

The SsrA or tmRNA quality control system intervenes when ribosomes stall on mRNAs and directs the addition of a C-terminal peptide tag that targets the modified polypeptide for degradation. Although hundreds of SsrA-tagged proteins can be detected in cells when degradation is prevented, most of these species have not been identified. Consequently, the mRNA sequence determinants that cause ribos...

متن کامل

Nascent SecM Chain Outside the Ribosome Reinforces Translation Arrest

SecM, a bacterial secretion monitor protein, contains a specific amino acid sequence at its C-terminus, called arrest sequence, which interacts with the ribosomal tunnel and arrests its own translation. The arrest sequence is sufficient and necessary for stable translation arrest. However, some previous studies have suggested that the nascent chain outside the ribosome affects the stability of ...

متن کامل

SsrA-mediated tagging in Bacillus subtilis.

A general mechanism in bacteria to rescue stalled ribosomes involves a stable RNA encoded by the ssrA gene. This RNA, termed tmRNA, encodes a proteolytic peptide tag which is cotranslationally added to truncated polypeptides, thereby targeting them for rapid proteolysis. To study this ssrA-mediated mechanism in Bacillus subtilis, a bipartite detection system was constructed that was composed of...

متن کامل

Identification of a SecM segment required for export-coupled release from elongation arrest.

SecM in Escherichia coli has two functionally crucial regions. The arrest motif near the C-terminus interacts with the ribosomal exit tunnel to arrest its own translational elongation. The signal sequence at the N-terminus directs the SecM nascent polypeptide to the Sec-mediated export pathway to release the arrested state of translation. Here, we addressed the importance of the central region ...

متن کامل

SecM facilitates translocase function of SecA by localizing its biosynthesis.

"Arrest sequence" of Escherichia coli SecM interacts with the ribosomal exit tunnel and arrests its own translation elongation, which is released by cotranslational export of the nascent SecM chain. This property of SecM is essential for the basal and regulated expression of SecA. Here we report that SecM has an additional role of facilitating SecA activities. Systematic determinations of the S...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Journal of Biological Chemistry

سال: 2004

ISSN: 0021-9258

DOI: 10.1074/jbc.m314012200