maintenance of CRISPR repeat elements / endonuclease activity / defense response to virus / 加水分解酵素; エステル加水分解酵素 / RNA binding 類似検索 - 分子機能
CRISPR-associated protein Csy1 / CRISPR-associated protein (Cas_Csy1) / CRISPR-associated endoribonuclease Cas6/Csy4, subtype I-F/YPEST / CRISPR-associated endoribonuclease Cas6/Csy4, subtype I-F/YPEST superfamily / CRISPR-associated protein (Cas_Csy4) / CRISPR-associated protein Csy2 / CRISPR-associated protein (Cas_Csy2) / CRISPR-associated protein Csy3 / CRISPR-associated protein (Cas_Csy3) 類似検索 - ドメイン・相同性
CRISPR type I-F/YPEST-associated protein Csy3 / Uncharacterized protein / SH3b domain-containing protein / CRISPR-associated protein Csy1 / CRISPR-associated protein Csy2 / CRISPR-associated protein Csy3 / CRISPR-associated endonuclease Cas6/Csy4 類似検索 - 構成要素
National Institutes of Health/Office of the Director
DP2EB020402
米国
National Institutes of Health/Office of the Director
S10OD021634
米国
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
R35GM134867
米国
引用
ジャーナル: Nat Commun / 年: 2020 タイトル: AcrIF9 tethers non-sequence specific dsDNA to the CRISPR RNA-guided surveillance complex. 著者: Marscha Hirschi / Wang-Ting Lu / Andrew Santiago-Frangos / Royce Wilkinson / Sarah M Golden / Alan R Davidson / Gabriel C Lander / Blake Wiedenheft / 要旨: Bacteria have evolved sophisticated adaptive immune systems, called CRISPR-Cas, that provide sequence-specific protection against phage infection. In turn, phages have evolved a broad spectrum of ...Bacteria have evolved sophisticated adaptive immune systems, called CRISPR-Cas, that provide sequence-specific protection against phage infection. In turn, phages have evolved a broad spectrum of anti-CRISPRs that suppress these immune systems. Here we report structures of anti-CRISPR protein IF9 (AcrIF9) in complex with the type I-F CRISPR RNA-guided surveillance complex (Csy). In addition to sterically blocking the hybridization of complementary dsDNA to the CRISPR RNA, our results show that AcrIF9 binding also promotes non-sequence-specific engagement with dsDNA, potentially sequestering the complex from target DNA. These findings highlight the versatility of anti-CRISPR mechanisms utilized by phages to suppress CRISPR-mediated immune systems.