Discovery of multiple anti-CRISPRs highlights anti-defense gene clustering in mobile genetic elements.
Discovery of multiple anti-CRISPRs highlights anti-defense gene clustering in mobile genetic elements.
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DOI:
10.1038/s41467-020-19415-3
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发表时间:
2020-11-06
影响因子:
16.6
通讯作者:
Bondy-Denomy J
中科院分区:
文献类型:
--
作者:
Pinilla-Redondo R;Shehreen S;Marino ND;Fagerlund RD;Brown CM;Sørensen SJ;Fineran PC;Bondy-Denomy J
Many prokaryotes employ CRISPR–Cas systems to combat invading mobile genetic elements (MGEs). In response, some MGEs have developed strategies to bypass immunity, including anti-CRISPR (Acr) proteins; yet the diversity, distribution and spectrum of activity of this immune evasion strategy remain largely unknown. Here, we report the discovery of new Acrs by assaying candidate genes adjacent to a conserved Acr-associated (Aca) gene, aca5, against a panel of six type I systems: I–F (Pseudomonas, Pectobacterium, and Serratia), I–E (Pseudomonas and Serratia), and I–C (Pseudomonas). We uncover 11 type I–F and/or I–E anti-CRISPR genes encoded on chromosomal and extrachromosomal MGEs within Enterobacteriaceae and Pseudomonas, and an additional Aca (aca9). The acr genes not only associate with other acr genes, but also with genes encoding inhibitors of distinct bacterial defense systems. Thus, our findings highlight the potential exploitation of acr loci neighborhoods for the identification of previously undescribed anti-defense systems. Mobile genetic elements have evolved anti-CRISPR (Acr) proteins to bypass the immunity provided by prokaryotic CRISPR–Cas systems. Here, the authors identify 11 type I Acrs encoded on mobile genetic elements, and show that acr loci neighborhoods can be used to discover inhibitors of other bacterial defense systems.
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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:
64.8
作者:
Bondy-Denomy J;Garcia B;Strum S;Du M;Rollins MF;Hidalgo-Reyes Y;Wiedenheft B;Maxwell KL;Davidson AR
通讯作者:
Davidson AR
影响因子:
14.9
作者:
Birkholz, Nils;Fagerlund, Robert D.;Fineran, Peter C.
通讯作者:
Fineran, Peter C.
影响因子:
64.5
作者:
Bhoobalan-Chitty, Yuvaraj;Johansen, Thomas Baek;Peng, Xu
通讯作者:
Peng, Xu
影响因子:
14.9
作者:
Drozdetskiy A;Cole C;Procter J;Barton GJ
通讯作者:
Barton GJ