Sequence-specific interactions of the tight-binding I12-X86 lac repressor with non-operator DNA

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Sequence-specific interactions of the tight-binding I12-X86 lac repressor with non-operator DNA.

The tight-binding I12-X86 lac repressor binds to non-operator DNA in a sequence-specific fashion. Using the DNA of the E. coli I gene we have investigated these sequence-specific interactions and compared them to the operator binding of wild-type repressor. The specific, non-operator DNA interactions are sensitive to the inducer IPTG. One strong binding site in the I gene DNA was found to be on...

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The dissociation of the repressor-operator complex from a series of negatively supercoiled plasmid DNAs was examined as a function of the sequence context, orientation, and spacing. The plasmids were grouped into four classes, each with common sequence context. The highest dissociation rate constants were observed for the plasmids containing only a single operator (or pseudooperator) sequence, ...

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Radiosensitivity of DNA in a specific protein-DNA complex: the lac repressor-lac operator complex.

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The 50th anniversary of Biopolymers coincides closely with the like celebration of the discovery of the Escherichia coli (lac) lactose operon, a classic genetic system long used to illustrate the influence of biomolecular structure on function. The looping of DNA induced by the binding of the Lac repressor protein to sequentially distant operator sites on DNA continues to serve as a paradigm fo...

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ژورنال

عنوان ژورنال: Nucleic Acids Research

سال: 1980

ISSN: 0305-1048,1362-4962

DOI: 10.1093/nar/8.3.487