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  • Title: In vitro DNA-binding properties of a manganese response regulator (ManR) from Anabaena sp.
    Author: Huang W, Wu Q.
    Journal: Biotechnol Lett; 2005 Feb; 27(4):233-7. PubMed ID: 15742142.
    Abstract:
    ManR of Anabaena sp. PCC 7120 is a manganese response regulator. Two ManR molecules bind to the specific DNA sequences at the same time, which was demonstrated by our previous results. From size exclusion chromatography, ManR exits as monomer in solution. Therefore, cooperative interactions of ManR-ManR play a role in DNA binding of the ManR, suggesting that ManR molecules bind co-operatively to DNA. When serial deletions of N-terminal of the ManR were also carried out the mutant proteins, ManRC111, ManRC130 and ManRC158, had completely lost the in DNA binding activity. Mutants ManRC 196, ManRC206, ManRC221 and ManRC230, however, could specifically bind to DNA, indicating that the amino acid residues between Val16 and Ile78 of the N-terminal of ManR are necessary for the DNA binding activity of C-terminal domain.
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