Structure of a trapped radical transfer pathway within a ribonucleotide reductase holocomplex.
Structure of a trapped radical transfer pathway within a ribonucleotide reductase holocomplex.
复制标题
DOI:
10.1126/science.aba6794
复制
发表时间:
2020-04-24
期刊:
影响因子:
--
通讯作者:
Drennan CL
中科院分区:
文献类型:
--
作者:
Kang G;Taguchi AT;Stubbe J;Drennan CL
Ribonucleotide reductases (RNRs) are a diverse family of enzymes that are alone capable of generating 2′-deoxynucleotides de novo and are thus critical in DNA biosynthesis and repair. The nucleotide reduction reaction in all RNRs requires the generation of a transient active site thiyl radical, and in class I RNRs this process involves a long-range radical transfer between two subunits, α and β. Due to the transient subunit association, an atomic resolution structure of an active α2β2 RNR complex has been elusive. Here we use a doubly-substituted β2, E52Q/-trifluorotyrosine122-β2 to trap wildtype-α2 in long-lived α2β2 complex. We report the structure of this complex by cryo-electron microscopy to 3.6-Å resolution, allowing for structural visualization of a 32-Å-long radical transfer pathway that affords RNR activity. A structure of the long-range radical transfer pathway within a ribonucleotide reductase.
登录
查看更多内容
影响因子:
48
作者:
Kucukelbir, Alp;Sigworth, Fred J.;Tagare, Hemant D.
通讯作者:
Tagare, Hemant D.
影响因子:
2.9
作者:
Artin, Erin;Wang, Jun;Lohman, Gregory J. S.;Yokoyama, Kenichi;Yu, Guixue;Griffin, Robert G.;Bar, Galit;Stubbe, JoAnne
通讯作者:
Stubbe, JoAnne
影响因子:
48
作者:
Barad BA;Echols N;Wang RY;Cheng Y;DiMaio F;Adams PD;Fraser JS
通讯作者:
Fraser JS
影响因子:
4.8
作者:
Lin, Qinghui;Parker, Mackenzie J.;Stubbe, JoAnne
通讯作者:
Stubbe, JoAnne
影响因子:
5.6
作者:
BROWN, NC;REICHARD, P
通讯作者:
REICHARD, P