PMID:1304369
Mauzy, CA and Hermodson, MA (1992) Structural and functional analyses of the repressor, RbsR, of the ribose operon of Escherichia coli.Protein Sci. 1:831-42
| Abstract | The DNA sequence encoding the rbs repressor protein, RbsR, has been determined. Amino acid sequence analyses of the product of an rbsR-lacZ fusion and of affinity-purified RbsR demonstrate that translation begins at an unusual codon, TTG, and that the initial amino acid is removed during maturation of the protein. DNA-binding assays indicate that RbsR binds to a region of perfect dyad symmetry spanning the rbs operon transcriptional start site and that the affinity for the rbs operator is reduced by addition of ribose, consistent with ribose being the inducer of the operon. RbsR is a member of a family of homologous repressor proteins having very similar DNA-binding sites and binding to similar operator sequences. |
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