Curation Information

Publication
HlyU acts as an H-NS antirepressor in the regulation of the RTX toxin gene essential for the virulence of the human pathogen Vibrio vulnificus CMCP6.;Liu M, Naka H, Crosa JH;Molecular microbiology 2009 Apr; 72(2):491-505 [19320834]
TF
H-NS [A0A087I6S4, view regulon]
Reported TF sp.
Vibrio vulnificus CMCP6
Reported site sp.
Vibrio vulnificus CMCP6
Created by
Dinara Sagitova
Curation notes
-

Experimental Process

Comparison of the rtxA1-lacZ expression levels in the hns+ and hns- strains revealed that H-NS negatively regulates rtxA1 expression. EMSA determined that up to 0.7 uM of H-NS had to be added before binding was observed. DNase I footprinting verified this result by showing that binding was not observed until 0.8 uM of H-NS was added.

Transcription Factor Binding Sites


TTCTTACTTTGTTTGCTTTTTGTATTTTTT
ATCTTTGTAATTATTAGTTTTTGTTAAATTA
ATTTTCTTTAAATTGTTCTCTATTACCG
ACTTAAATAAAAGTGAATACATATCA
AACCCTTCATTGTTGGACATAATTAAATTACTTA
TTCTTACTTTGTTTGCTTTTTGTATTTTTT
ATCTTTGTAATTATTAGTTTTTGTTAAATTA
ATTTTCTTTAAATTGTTCTCTATTACCG
ACTTAAATAAAAGTGAATACATATCA
AACCCTTCATTGTTGGACATAATTAAATTACTTA

Gene Regulation

Regulated genes for each binding site are displayed below. Gene regulation diagrams show binding sites, positively-regulated genes, negatively-regulated genes, both positively and negatively regulated genes, genes with unspecified type of regulation. For each indvidual site, experimental techniques used to determine the site are also given.

Site sequence Regulated genes Gene diagram Experimental techniques TF function TF type