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


ABSTRACT: Transcription factor DksA contains a four-Cys Zn(2 +)-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 Zn(2+) limitation. Although DksA2 does not bind Zn(2+), 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.

SUBMITTER: Furman R 

PROVIDER: S-EPMC5525025 | biostudies-literature | 2013 Mar

REPOSITORIES: biostudies-literature

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

Furman Ran R   Biswas Tapan T   Danhart Eric M EM   Foster Mark P MP   Tsodikov Oleg V OV   Artsimovitch Irina I  

FEBS letters 20130214 6


Transcription factor DksA contains a four-Cys Zn(2 +)-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 Zn(2+) limitation. Although DksA2 does not bind Zn(2+), 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 sim  ...[more]

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