RRC ID 35390
著者 Saito A, Hizukuri Y, Matsuo E, Chiba S, Mori H, Nishimura O, Ito K, Akiyama Y.
タイトル Post-liberation cleavage of signal peptides is catalyzed by the site-2 protease (S2P) in bacteria.
ジャーナル Proc Natl Acad Sci U S A
Abstract A signal peptide (SP) is cleaved off from presecretory proteins by signal peptidase during or immediately after insertion into the membrane. In metazoan cells, the cleaved SP then receives proteolysis by signal peptide peptidase, an intramembrane-cleaving protease (I-CLiP). However, bacteria lack any signal peptide peptidase member I-CLiP, and little is known about the metabolic fate of bacterial SPs. Here we show that Escherichia coli RseP, an site-2 protease (S2P) family I-CLiP, introduces a cleavage into SPs after their signal peptidase-mediated liberation from preproteins. A Bacillus subtilis S2P protease, RasP, is also shown to be involved in SP cleavage. These results uncover a physiological role of bacterial S2P proteases and update the basic knowledge about the fate of signal peptides in bacterial cells.
巻・号 108(33)
ページ 13740-5
公開日 2011-8-16
DOI 10.1073/pnas.1108376108
PII 1108376108
PMID 21810987
PMC PMC3158159
MeSH Bacillus subtilis / enzymology* Catalysis Endopeptidases / metabolism* Escherichia coli / enzymology* Escherichia coli Proteins / metabolism* Hydrolysis Membrane Proteins / metabolism* Protein Sorting Signals*
IF 9.412
引用数 37
WOS 分野 BIOCHEMISTRY & MOLECULAR BIOLOGY
リソース情報
原核生物(大腸菌) JW0940-KC JW2203-KC JW2556-KC