Structure-based insights into self-cleavage by a four-way junctional twister-sister ribozyme.
Structure-based insights into self-cleavage by a four-way junctional twister-sister ribozyme.
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基于结构的四路连接扭转姐妹核酶自裂解的见解
DOI:
10.1038/s41467-017-01276-y
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发表时间:
2017-10-30
影响因子:
16.6
通讯作者:
Ren A
中科院分区:
文献类型:
--
作者:
Zheng L;Mairhofer E;Teplova M;Zhang Y;Ma J;Patel DJ;Micura R;Ren A
Here we report on the crystal structure and cleavage assays of a four-way junctional twister-sister self-cleaving ribozyme. Notably, 11 conserved spatially separated loop nucleotides are brought into close proximity at the ribozyme core through long-range interactions mediated by hydrated Mg2+cations. The C62–A63 step at the cleavage site adopts a splayed-apart orientation, with flexible C62 directed outwards, whereas A63 is directed inwards and anchored by stacking and hydrogen-bonding interactions. Structure-guided studies of key base, sugar, and phosphate mutations in the twister-sister ribozyme, suggest contributions to the cleavage chemistry from interactions between a guanine at the active site and the non-bridging oxygen of the scissile phosphate, a feature found previously also for the related twister ribozyme. Our four-way junctional pre-catalytic structure differs significantly in the alignment at the cleavage step (splayed-apart vs. base-stacked) and surrounding residues and hydrated Mg2+ions relative to a reported three-way junctional pre-catalytic structure of the twister-sister ribozyme.
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DOI:
10.1261/rna.059824.116
发表时间:
2017-03
期刊:
RNA (New York, N.Y.)
影响因子:
--
作者:
Lau MW;Trachman RJ 3rd;Ferré-D'Amaré AR
通讯作者:
Ferré-D'Amaré AR
DOI:
10.1016/j.ymeth.2016.04.027
发表时间:
2016-08-15
期刊:
Methods (San Diego, Calif.)
影响因子:
--
作者:
Lau MW;Ferré-D'Amaré AR
通讯作者:
Ferré-D'Amaré AR
影响因子:
14.8
作者:
Bingaman JL;Zhang S;Stevens DR;Yennawar NH;Hammes-Schiffer S;Bevilacqua PC
通讯作者:
Bevilacqua PC
DOI:
10.3390/molecules22010078
发表时间:
2017-01-04
期刊:
Molecules (Basel, Switzerland)
影响因子:
--
作者:
de la Peña M;García-Robles I;Cervera A
通讯作者:
Cervera A
DOI:
10.1073/pnas.1414571111
发表时间:
2014-09-09
影响因子:
11.1
作者:
Eiler, Daniel;Wang, Jimin;Steitz, Thomas A.
通讯作者:
Steitz, Thomas A.