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Characterization of the specific interaction between archaeal FHA domain-containing protein and the promoter of a flagellar-like gene-cluster and its regulation by phosphorylation.

Abstract：

:The mechanism and target genes of regulation by Forkhead (FHA) domain-containing transcription factors have not yet been documented in Archaea. In this study, using a bacterial one-hybrid technique, we successfully screened and identified for the first time a target gene regulated by ST0829, an FHA domain-containing potential transcriptional factor in the hyperthermophilic archaeon Sulfolobus tokodaii. We show that ST0829 could specifically bind to the promoter region of ST2519p, the archaeal flagellar protein-encoding operon (including FlaG, FlaF, FlaH, FlaI, and FlaJ) by using both in vitro electrophoretic mobility shift assay and surface plasmon resonance experiments, and invivo chromatin immunoprecipitation assays. Furthermore, phosphorylation of the FHA domain-containing protein was found to negatively regulate its specific DNA-binding activity. The interaction between ST0829 and ST2519p could be inhibited by wild-type Ser/Thr protein kinase ST1565, but was not significantly affected by its mutant variant ST1565-K166A that lacks kinase activity. These findings not only increase our knowledge about the function of an archaeal FHA domain-containing regulator but also offer important insights for further understanding the signaling mechanism of environmental adaptation in archaea.

journal_name

Biochem Biophys Res Commun

journal_title

Biochemical and biophysical research communications

authors

Duan X,He ZG

doi

10.1016/j.bbrc.2011.03.011

subject

Has Abstract

pub_date

2011-04-01 00:00:00

pages

242-7

issue

1

eissn

0006-291X

issn

1090-2104

pii

S0006-291X(11)00383-4

journal_volume

407

pub_type

杂志文章

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