Bacterial SEAL domains undergo autoproteolysis and function in regulated intramembrane proteolysis.
Bacterial SEAL domains undergo autoproteolysis and function in regulated intramembrane proteolysis.
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细菌 SEAL 结构域经历自身蛋白水解并在调节的膜内蛋白水解中发挥作用。
DOI:
10.1101/2023.06.27.546760
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发表时间:
2023
期刊:
影响因子:
--
通讯作者:
Rudner,DavidZ
中科院分区:
文献类型:
--
作者:
Brogan,AnnaP;Habib,Cameron;Hobbs,SamuelJ;Kranzusch,PhilipJ;Rudner,DavidZ
Gram-positive bacteria use SigI/RsgI-family sigma factor/anti-sigma factor pairs to sense and respond to cell wall defects and plant polysaccharides. InBacillus subtilis,this signal transduction pathway involves regulated intramembrane proteolysis (RIP) of the membrane-anchored anti-sigma factor RsgI. However, unlike most RIP signaling pathways, site-1 cleavage of RsgI on the extracytoplasmic side of the membrane is constitutive and the cleavage products remain stably associated, preventing intramembrane proteolysis. The regulated step in this pathway is their dissociation, which is hypothesized to involve mechanical force. Release of the ectodomain enables intramembrane cleavage by the RasP site-2 protease and activation of SigI. The constitutive site-1 protease has not been identified for any RsgI homolog. Here, we report that RsgI’s extracytoplasmic domain has structural and functional similarities to eukaryotic SEA domains that undergo autoproteolysis and have been implicated in mechanotransduction. We show that site-1 proteolysis inB. subtilisand Clostridial RsgI family members is mediated by enzyme-independent autoproteolysis of these SEA-like domains. Importantly, the site of proteolysis enables retention of the ectodomain through an undisrupted β-sheet that spans the two cleavage products. Autoproteolysis can be abrogated by relief of conformational strain in the scissile loop, in a mechanism analogous to eukaryotic SEA domains. Collectively, our data support the model that RsgI–SigI signaling is mediated by mechanotransduction in a manner that has striking parallels with eukaryotic mechanotransducive signaling pathways.
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影响因子:
158.5
作者:
L. Matter;J. Wilhelm;W. Angehrn;F. Skvaril;K. Schopfer
通讯作者:
K. Schopfer
DOI:
10.1172/jci108148
发表时间:
1975
期刊:
The Journal of clinical investigation
影响因子:
--
作者:
R. O'Reilly;P. Anderson;D. Ingram;G. Peter;D. Smith
通讯作者:
D. Smith
影响因子:
3.7
作者:
W. Riesen;F. Skvaril;D. Braun
通讯作者:
D. Braun
影响因子:
15.9
作者:
W. J. Yount;M. Seligmann;R. Hong;R. Good;H. Kunkel
通讯作者:
H. Kunkel
DOI:
--
发表时间:
1981
期刊:
Reviews of Infectious Diseases
影响因子:
--
作者:
R. Austrian
通讯作者:
R. Austrian