Crystal structure of an RNA-cleaving DNAzyme.
Crystal structure of an RNA-cleaving DNAzyme.
复制标题
RNA 切割 DNAzyme 的晶体结构
DOI:
10.1038/s41467-017-02203-x
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发表时间:
2017-12-08
影响因子:
16.6
通讯作者:
Gan J
中科院分区:
文献类型:
--
作者:
Liu H;Yu X;Chen Y;Zhang J;Wu B;Zheng L;Haruehanroengra P;Wang R;Li S;Lin J;Li J;Sheng J;Huang Z;Ma J;Gan J
In addition to storage of genetic information, DNA can also catalyze various reactions. RNA-cleaving DNAzymes are the catalytic DNAs discovered the earliest, and they can cleave RNAs in a sequence-specific manner. Owing to their great potential in medical therapeutics, virus control, and gene silencing for disease treatments, RNA-cleaving DNAzymes have been extensively studied; however, the mechanistic understandings of their substrate recognition and catalysis remain elusive. Here, we report three catalytic form 8–17 DNAzyme crystal structures. 8–17 DNAzyme adopts a V-shape fold, and the Pb2+cofactor is bound at the pre-organized pocket. The structures with Pb2+and the modification at the cleavage site captured the pre-catalytic state of the RNA cleavage reaction, illustrating the unexpected Pb2+-accelerated catalysis, intrinsic tertiary interactions, and molecular kink at the active site. Our studies reveal that DNA is capable of forming a compacted structure and that the functionality-limited bio-polymer can have a novel solution for a functional need in catalysis.
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影响因子:
16
作者:
Luciano DJ;Vasilyev N;Richards J;Serganov A;Belasco JG
通讯作者:
Belasco JG
影响因子:
16.8
作者:
Coppins, RL;Silverman, SK
通讯作者:
Silverman, SK
DOI:
10.1107/s0907444904019158
发表时间:
2004-12-01
影响因子:
2.2
作者:
Emsley, P;Cowtan, K
通讯作者:
Cowtan, K
影响因子:
64.8
作者:
CUENOUD, B;SZOSTAK, JW
通讯作者:
SZOSTAK, JW
影响因子:
2.9
作者:
Brown, AK;Li, J;Lu, Y
通讯作者:
Lu, Y