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-Structure paper
タイトル | Inhibition of SRP-dependent protein secretion by the bacterial alarmone (p)ppGpp. |
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ジャーナル・号・ページ | Nat Commun, Vol. 13, Issue 1, Page 1069, Year 2022 |
掲載日 | 2022年2月25日 |
著者 | Laura Czech / Christopher-Nils Mais / Hanna Kratzat / Pinku Sarmah / Pietro Giammarinaro / Sven-Andreas Freibert / Hanna Folke Esser / Joanna Musial / Otto Berninghausen / Wieland Steinchen / Roland Beckmann / Hans-Georg Koch / Gert Bange / |
PubMed 要旨 | The stringent response enables bacteria to respond to nutrient limitation and other stress conditions through production of the nucleotide-based second messengers ppGpp and pppGpp, collectively known ...The stringent response enables bacteria to respond to nutrient limitation and other stress conditions through production of the nucleotide-based second messengers ppGpp and pppGpp, collectively known as (p)ppGpp. Here, we report that (p)ppGpp inhibits the signal recognition particle (SRP)-dependent protein targeting pathway, which is essential for membrane protein biogenesis and protein secretion. More specifically, (p)ppGpp binds to the SRP GTPases Ffh and FtsY, and inhibits the formation of the SRP receptor-targeting complex, which is central for the coordinated binding of the translating ribosome to the SecYEG translocon. Cryo-EM analysis of SRP bound to translating ribosomes suggests that (p)ppGpp may induce a distinct conformational stabilization of the NG domain of Ffh and FtsY in Bacillus subtilis but not in E. coli. |
リンク | Nat Commun / PubMed:35217658 / PubMed Central |
手法 | EM (単粒子) / X線回折 |
解像度 | 2.4 - 3.33 Å |
構造データ | EMDB-12734, PDB-7o5b: EMDB-12735: EMDB-13839: EMDB-13840: PDB-7o9f: PDB-7o9g: PDB-7o9h: PDB-7o9i: |
化合物 | ChemComp-G4P: ChemComp-MG: ChemComp-HOH: ChemComp-0O2: |
由来 |
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キーワード | RIBOSOME / signal recognition particle co-translational targeting alarmones translation GTPases stress response / TRANSLATION / stringent response / targeting complex / signal recognition particle / alarmones / stress |