The cell pole: the site of cross talk between the DNA uptake and genetic recombination machinery.
The cell pole: the site of cross talk between the DNA uptake and genetic recombination machinery.
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DOI:
10.3109/10409238.2012.729562
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发表时间:
2012-11
影响因子:
6.5
通讯作者:
Alonso JC
中科院分区:
文献类型:
--
作者:
Kidane D;Ayora S;Sweasy JB;Graumann PL;Alonso JC
Natural transformation is a programmed mechanism characterized by binding of free double-stranded (ds) DNA from the environment to the cell pole in rod-shaped bacteria. In Bacillus subtilis some competence proteins, which process the dsDNA and translocate single-stranded (ss) DNA into the cytosol, recruit a set of recombination proteins mainly to one of the cell poles. A subset of single-stranded binding proteins, working as “guardians”, protect ssDNA from degradation and limit the RecA recombinase loading. Then, the “mediators” overcome the inhibitory role of guardians, and recruit RecA onto ssDNA. A RecA·ssDNA filament searches for homology on the chromosome and, in a process that is controlled by “modulators”, catalyzes strand invasion with the generation of a displacement loop (D-loop). A D-loop resolvase or “resolver” cleaves this intermediate, limited DNA replication restores missing information and a DNA ligase seals the DNA ends. However, if any step fails, the “rescuers” will repair the broken end to rescue chromosomal transformation. If the ssDNA does not share homology with resident DNA, but it contains information for autonomous replication, guardian and mediator proteins catalyze plasmid establishment after inhibition of RecA. DNA replication and ligation reconstitute the molecule (plasmid transformation). In this review, the interacting network that leads to a cross talk between proteins of the uptake and genetic recombination machinery will be placed into prospective.
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影响因子:
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作者:
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作者:
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Dubnau, David
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作者:
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DOI:
10.1084/jem.79.2.137
发表时间:
1944-02-01
期刊:
The Journal of experimental medicine
影响因子:
--
作者:
Avery OT;Macleod CM;McCarty M
通讯作者:
McCarty M