Structural basis for Cas9 off-target activity.
Structural basis for Cas9 off-target activity.
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CAS9非目标活动的结构基础。
DOI:
10.1016/j.cell.2022.09.026
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发表时间:
2022-10-27
期刊:
影响因子:
64.5
通讯作者:
Jinek M
中科院分区:
文献类型:
--
作者:
Pacesa M;Lin CH;Cléry A;Saha A;Arantes PR;Bargsten K;Irby MJ;Allain FH;Palermo G;Cameron P;Donohoue PD;Jinek M
The target DNA specificity of the CRISPR-associated genome editor nuclease Cas9 is determined by complementarity to a 20-nucleotide segment in its guide RNA. However, Cas9 can bind and cleave partially complementary off-target sequences, which raises safety concerns for its use in clinical applications. Here we report crystallographic structures of Cas9 bound to bona fide off-target substrates, revealing that off-target binding is enabled by a range of non-canonical base pairing interactions within the guide–off-target heteroduplex. Off-target sites containing single-nucleotide deletions relative to the guide RNA are accommodated by base skipping or multiple non-canonical base pairs rather than RNA bulge formation. Additionally, PAM-distal mismatches result in duplex unpairing and induce a conformational change of the Cas9 REC lobe that perturbs its conformational activation. Together, these insights provide a structural rationale for the off-target activity of Cas9 and contribute to the improved rational design of guide RNAs and off-target prediction algorithms.
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影响因子:
16.6
作者:
Cromwell CR;Sung K;Park J;Krysler AR;Jovel J;Kim SK;Hubbard BP
通讯作者:
Hubbard BP
影响因子:
46.9
作者:
通讯作者:
--
影响因子:
46.9
作者:
Doench JG;Fusi N;Sullender M;Hegde M;Vaimberg EW;Donovan KF;Smith I;Tothova Z;Wilen C;Orchard R;Virgin HW;Listgarten J;Root DE
通讯作者:
Root DE
影响因子:
64.8
作者:
Anders, Carolin;Niewoehner, Ole;Duerst, Alessia;Jinek, Martin
通讯作者:
Jinek, Martin
影响因子:
46.9
作者:
Hendel A;Bak RO;Clark JT;Kennedy AB;Ryan DE;Roy S;Steinfeld I;Lunstad BD;Kaiser RJ;Wilkens AB;Bacchetta R;Tsalenko A;Dellinger D;Bruhn L;Porteus MH
通讯作者:
Porteus MH