Repeated strand invasion and extensive branch migration are hallmarks of meiotic recombination.
Repeated strand invasion and extensive branch migration are hallmarks of meiotic recombination.
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反复的链入侵和广泛的分支迁移是减数分裂重组的标志。
DOI:
10.1016/j.molcel.2021.08.003
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发表时间:
2021-10-21
期刊:
影响因子:
16
通讯作者:
Lichten M
中科院分区:
文献类型:
--
作者:
Ahuja JS;Harvey CS;Wheeler DL;Lichten M
Currently favored models for meiotic recombination posit that both noncrossover and crossover recombination are initiated by DNA double strand breaks but form by different mechanisms: noncrossovers by synthesis dependent strand annealing; and crossovers by formation and resolution of double Holliday junctions centered around the break. This dual mechanism hypothesis predicts different hybrid DNA patterns in noncrossover and crossover recombinants. We show that these predictions are not upheld, by mapping with unprecedented resolution parental strand contributions to recombinants at a model locus. Instead, break repair in both noncrossovers and crossovers involves synthesis-dependent strand annealing, often with multiple rounds of strand invasion. Crossover-specific double Holliday junction formation occurs via processes involving branch migration as an integral feature, that can be separated from repair of the break itself. These findings reveal meiotic recombination to be a highly dynamic process and prompt a new view of the relationship between crossover and noncrossover recombination. Ahuja et al. analyze parental strand contributions to meiotic recombinants and conclude that the same break-repair mechanism is used during noncrossover and crossover formation. They also conclude that crossovers, but not noncrossovers, are produced by the resolution of double Holliday junctions whose formation involves branch migration as an integral feature.
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影响因子:
11.4
作者:
Coïc, E;Gluck, L;Fabre, F
通讯作者:
Fabre, F
影响因子:
64.8
作者:
通讯作者:
--
DOI:
10.1126/science.aaf4778
发表时间:
2017-01-27
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Ahuja JS;Sandhu R;Mainpal R;Lawson C;Henley H;Hunt PA;Yanowitz JL;Börner GV
通讯作者:
Börner GV
DOI:
10.1007/978-1-61779-129-1_7
发表时间:
2011-01-01
期刊:
DNA RECOMBINATION: METHODS AND PROTOCOLS
影响因子:
--
作者:
Ahuja, Jasvinder S.;Boerner, G. Valentin
通讯作者:
Boerner, G. Valentin
DOI:
10.1101/sqb.1983.047.01.095
发表时间:
1982-01-01
期刊:
COLD SPRING HARBOR SYMPOSIA ON QUANTITATIVE BIOLOGY
影响因子:
--
作者:
BELL, LR;BYERS, B
通讯作者:
BYERS, B