RNA-activated protein cleavage with a CRISPR-associated endopeptidase.
RNA-activated protein cleavage with a CRISPR-associated endopeptidase.
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DOI:
10.1126/science.add7450
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发表时间:
2022-11-25
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CRISPR-Cas systems provide adaptive immune responses in prokaryotes against foreign genetic elements through RNA-guided nuclease activity. Recently, additional genes with non-nuclease functions have been found in genetic association with CRISPR systems, suggesting there may be other RNA-guided non-nucleolytic enzymes. One such gene encodes the TPR-CHAT protease Csx29, which is associated with the CRISPR effector Cas7–11. Here, we demonstrate that this CRISPR-associated protease (CASP) exhibits programmable RNA-activated endopeptidase activity against a sigma factor inhibitor to regulate a transcriptional response. Cryo–electron microscopy of an active and substrate-bound CASP complex reveals an allosteric activation mechanism that reorganizes Csx29 catalytic residues upon target RNA binding. This work reveals an RNA-guided function in nature which can be leveraged for RNA sensing applications in vitro and in human cells.
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影响因子:
16.8
作者:
Boland A;Martin TG;Zhang Z;Yang J;Bai XC;Chang L;Scheres SH;Barford D
通讯作者:
Barford D
影响因子:
14.9
作者:
Casas-Pastor D;Müller RR;Jaenicke S;Brinkrolf K;Becker A;Buttner MJ;Gross CA;Mascher T;Goesmann A;Fritz G
通讯作者:
Fritz G
DOI:
10.1042/bj20141324
发表时间:
2015-03-01
期刊:
The Biochemical journal
影响因子:
--
作者:
McLuskey K;Mottram JC
通讯作者:
Mottram JC
DOI:
10.1126/science.aba0372
发表时间:
2020-08-28
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Gao L;Altae-Tran H;Böhning F;Makarova KS;Segel M;Schmid-Burgk JL;Koob J;Wolf YI;Koonin EV;Zhang F
通讯作者:
Zhang F
影响因子:
9.8
作者:
Lane, William J;Darst, Seth A
通讯作者:
Darst, Seth A