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winged helix-turn-helix transcriptional regulator
ROK family protein
This family, known as ROK (Repressor, ORF, Kinase) includes the xylose operon repressor, xylR, from Bacillus subtilis, Lactobacillus pentosus and Staphylococcus xylosus; N-acetylglucosamine repressor, nagC, from Escherichia coli; glucokinase from Streptomyces coelicolor; fructokinase from from Pediococcus pentosaceus, Streptococcus mutans and Zymomonas mobilis; allokinase and mlc from E. coli; and E. coli hypothetical proteins yajF and yhcI and the corresponding Haemophilus influenzae proteins. The repressor proteins (xylR and nagC) from this family possess an N-terminal region not present in the sugar kinases and which contains an helix-turn-helix DNA-binding motif. (from Pfam)
xylose repressor
xylose repressor acts as a transcriptional repressor of xylose-utilizing enzymes
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