Following replicative DNA synthesis by time-resolved X-ray crystallography.
Following replicative DNA synthesis by time-resolved X-ray crystallography.
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DOI:
10.1038/s41467-021-22937-z
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发表时间:
2021-05-11
影响因子:
16.6
通讯作者:
Chaput JC
中科院分区:
文献类型:
--
作者:
Chim N;Meza RA;Trinh AM;Yang K;Chaput JC
The mechanism of DNA synthesis has been inferred from static structures, but the absence of temporal information raises longstanding questions about the order of events in one of life’s most central processes. Here we follow the reaction pathway of a replicative DNA polymerase using time-resolved X-ray crystallography to elucidate the order and transition between intermediates. In contrast to the canonical model, the structural changes observed in the time-lapsed images reveal a catalytic cycle in which translocation precedes catalysis. The translocation step appears to follow a push-pull mechanism where the O-O1 loop of the finger subdomain acts as a pawl to facilitate unidirectional movement along the template with conserved tyrosine residues 714 and 719 functioning as tandem gatekeepers of DNA synthesis. The structures capture the precise order of critical events that may be a general feature of enzymatic catalysis among replicative DNA polymerases. DNA polymerases are the key enzymes responsible for DNA replication and repair. Here the authors reveal through time-lapsed images of X-ray crystal structures that translocation precedes phosphodiester bond formation in the mechanism of DNA synthesis.
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影响因子:
7.7
作者:
Chim, Nicholas;Jackson, Lynnette N.;Chaput, John C.
通讯作者:
Chaput, John C.
DOI:
10.1073/pnas.97.10.5095
发表时间:
2000-05-09
影响因子:
11.1
作者:
Patel, PH;Loeb, LA
通讯作者:
Loeb, LA
影响因子:
15
作者:
Berezhna, Svitlana Y.;Gill, Joshua P.;Lamichhane, Rajan;Millar, David P.
通讯作者:
Millar, David P.
DOI:
10.1107/s0907444909042073
发表时间:
2010-01
期刊:
Acta crystallographica. Section D, Biological crystallography
影响因子:
--
作者:
Chen VB;Arendall WB 3rd;Headd JJ;Keedy DA;Immormino RM;Kapral GJ;Murray LW;Richardson JS;Richardson DC
通讯作者:
Richardson DC
影响因子:
2.9
作者:
Brown JA;Suo Z
通讯作者:
Suo Z