Pseudomonas aeruginosa MutL promotes large chromosomal deletions through non-homologous end joining to prevent bacteriophage predation.
Pseudomonas aeruginosa MutL promotes large chromosomal deletions through non-homologous end joining to prevent bacteriophage predation.
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铜绿假单胞菌 MutL 通过非同源末端连接促进大量染色体缺失,以防止噬菌体捕食。
DOI:
10.1093/nar/gky160
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发表时间:
2018-05-18
影响因子:
14.9
通讯作者:
Le S
中科院分区:
文献类型:
--
作者:
Shen M;Zhang H;Shen W;Zou Z;Lu S;Li G;He X;Agnello M;Shi W;Hu F;Le S
Abstract Pseudomonas aeruginosa is an opportunistic pathogen with a relatively large genome, and has been shown to routinely lose genomic fragments during environmental selection. However, the underlying molecular mechanisms that promote chromosomal deletion are still poorly understood. In a recent study, we showed that by deleting a large chromosomal fragment containing two closely situated genes, hmgA and galU, P. aeruginosa was able to form ‘brown mutants’, bacteriophage (phage) resistant mutants with a brown color phenotype. In this study, we show that the brown mutants occur at a frequency of 227 ± 87 × 10−8 and contain a deletion ranging from ∼200 to ∼620 kb. By screening P. aeruginosa transposon mutants, we identified mutL gene whose mutation constrained the emergence of phage-resistant brown mutants. Moreover, the P. aeruginosa MutL (PaMutL) nicking activity can result in DNA double strand break (DSB), which is then repaired by non-homologous end joining (NHEJ), leading to chromosomal deletions. Thus, we reported a noncanonical function of PaMutL that promotes chromosomal deletions through NHEJ to prevent phage predation.
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DOI:
10.1038/nrmicro.2015.13
发表时间:
2016-03
期刊:
Nature reviews. Microbiology
影响因子:
--
作者:
通讯作者:
--
影响因子:
4.5
作者:
Lee MC;Marx CJ
通讯作者:
Marx CJ
影响因子:
3.8
作者:
Correa, Elisa M. E.;Martina, Mariana A.;Barra, Jose L.
通讯作者:
Barra, Jose L.
影响因子:
4.9
作者:
Khaledi, Ariane;Schniederjans, Monika;Haeussler, Susanne
通讯作者:
Haeussler, Susanne
影响因子:
3.7
作者:
Le S;He X;Tan Y;Huang G;Zhang L;Lux R;Shi W;Hu F
通讯作者:
Hu F