RNA-activated protein cleavage with a CRISPR-associated endopeptidase

In prokaryotes, CRISPR-Cas systems provide adaptive immune responses 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 that there may be other RNA-guided non-nucleolytic enzymes. One such gene from Desulfonema ishimotonii 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 that can be leveraged for RNA-sensing applications in vitro and in human cells.

Errataetall:

CommentIn: Nat Rev Genet. 2023 Feb;24(2):71. - PMID 36543986

Medienart:

E-Artikel

Erscheinungsjahr:

2022

Erschienen:

2022

Enthalten in:

Zur Gesamtaufnahme - volume:378

Enthalten in:

Science (New York, N.Y.) - 378(2022), 6622 vom: 25. Nov., Seite 874-881

Sprache:

Englisch

Beteiligte Personen:

Strecker, Jonathan [VerfasserIn]
Demircioglu, F Esra [VerfasserIn]
Li, David [VerfasserIn]
Faure, Guilhem [VerfasserIn]
Wilkinson, Max E [VerfasserIn]
Gootenberg, Jonathan S [VerfasserIn]
Abudayyeh, Omar O [VerfasserIn]
Nishimasu, Hiroshi [VerfasserIn]
Macrae, Rhiannon K [VerfasserIn]
Zhang, Feng [VerfasserIn]

Links:

Volltext

Themen:

Bacterial Proteins
CRISPR-Associated Proteins
EC 3.4.-
Endopeptidases
Journal Article
RNA, Bacterial
RNA, Guide, CRISPR-Cas Systems
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't
Sigma Factor

Anmerkungen:

Date Completed 30.11.2022

Date Revised 04.01.2024

published: Print-Electronic

CommentIn: Nat Rev Genet. 2023 Feb;24(2):71. - PMID 36543986

Citation Status MEDLINE

doi:

10.1126/science.add7450

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM349363471