Specific binding of mu repressor to DNA

Kwoh, D., Zipser, D. (February 1979) Specific binding of mu repressor to DNA. Nature, 277 (5696). pp. 489-91. ISSN 0028-0836 (Print)0028-0836 (Linking)

URL: http://www.ncbi.nlm.nih.gov/pubmed/763334
DOI: 10.1038/277489a0


PHAGE MU is a temperate virus of Escherichia coli (for reviews see refs 1, 2). The immunity system of Mu has been shown by genetic and physical mapping to lie in the furthest left, 1,000-base-pair restriction fragment of the phage DNA3–6. This end of the phage genome is associated with a short (100-base pair) segment of bacterial DNA4. The HindIII-c restriction fragment of Mu (the furthest left 1,000 base pairs4) has been cloned into the amplifiable plasmid pMB9 (ref. 7). These recombinant plasmids confer high levels of Mu immunity on their hosts and, when recloned into minicell-producing strains, were shown to produce an additional protein of 25,000 subunit molecular weight in purified minicells6,7. This protein is assumed to be the Mu repressor because its production is correlated with immunity to Mu. We report here experiments which show that this protein binds specifically and with high affinity to Mu DNA, as would be expected of the Mu repressor. Furthermore, we demonstrate that the DNA sequence (operator) to which the Mu repressor binds is located on the same HindIII-c restriction fragment of Mu DNA as the repressor gene.

Item Type: Paper
Uncontrolled Keywords: Coliphages/*metabolism DNA, Viral/*metabolism Protein Binding Repressor Proteins/*metabolism Transcription Factors/*metabolism Viral Proteins/metabolism
Subjects: bioinformatics > genomics and proteomics > genetics & nucleic acid processing > DNA, RNA structure, function, modification
bioinformatics > genomics and proteomics > genetics & nucleic acid processing > protein structure, function, modification > protein types > transcription factor
CSHL Authors:
Communities: CSHL labs
Depositing User: Matt Covey
Date: 8 February 1979
Date Deposited: 13 May 2016 20:05
Last Modified: 13 May 2016 20:05
Related URLs:
URI: https://repository.cshl.edu/id/eprint/32702

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