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KMID : 0364820110470010158
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Korean Journal of Microbiology
2011 Volume.47 No. 1 p.158 ~ p.162
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DNA Binding Specificity of Proteus mirabilis Transcription Regulator
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Gang Jong-Back
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Abstract
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Amino acid sequence alignment shows that Proteus mirabilis transcription regulator (PMTR) has cystein sequence homology at metal binding domain to CueR (copper resistance) protein, which conserves two cysteins (Cys 112 and Cys 120 in PMTR). Gel shift assay revealed that PMTR protein bound to promoter region of Escherichia coli copA (copper-translocating P-type ATPase) and Proteus mirabilis atpase (putative copper-translocating P-type ATPase) genes except that of E. coli zntA (zinc-translocating P-type ATPase) gene. DNase I protection experiment indicated that PMTR protein protected the region over -35 box and close to -10 box. DNase I hypersensitive bases were shown at C and A bases of labeled template strand and at G and C bases of labeled non-template strand of DNA. These hypersensitive bases were appeared in other metalloregulatory proteins of MerR family, which suggests protein-induced DNA bending.
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KEYWORD
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MerR family, metalloregulatory protein, protein-DNA interaction
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