DksA2, a zinc-independent structural analog of the transcription factor DksA.

DksA2, a zinc-independent structural analog of the transcription factor DksA.
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DOI:
10.1016/j.febslet.2013.01.073
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发表时间:
2013-03-18
期刊:
影响因子:
3.5
通讯作者:
Artsimovitch I
Artsimovitch I
中科院分区:
生物学3区
文献类型:
--
作者:
Furman R;Biswas T;Danhart EM;Foster MP;Tsodikov OV;Artsimovitch I

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Transcription factor DksA contains a four-Cys Zn2 +-finger motif thought to be responsible for structural integrity and the relative disposition of its domains. Pseudomonas aeruginosa encodes an additional DksA paralog (DksA2) that is expressed selectively under Zn2+ limitation. Although DksA2 does not bind Zn2+, it complements the Escherichia coli dksA deletion and has similar effects on transcription in vitro. In this study, structural and biochemical analyses reveal that DksA2 has a similar fold, domain structure and RNA polymerase binding properties to those of the E. coli DksA despite the lack of the stabilizing metal ion.
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