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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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A DNA fragment containing the groE genes can suppress mutations in the Escherichia coli dnaA gene.

An 8.2 kb fragment of E. coli chromosomal DNA, when cloned in increased copy number, suppresses the dnaA46 mutation, and an abundant protein of about 68 kd (60 kd when measured by us), encoded by the fragment, is essential for the suppression (Takeda and Hirota 1982). Mapping experiments show that the fragment originates from the 94 min region of the chromosome. It encodes several proteins but only one abundant polypeptide of the correct size, the product of the groEL gene. Suppression by the fragment is allele specific; those mutations which map to the centre of the gene are suppressed. Other initiation mutants including dnaA203, dnaA204, dnaA508, dnaAam, dnaC, dnaP and dnaB252 are not suppressed. Most suppressed strains are cold-sensitive suggesting an interaction between the mutant proteins (or their genes) and the suppressing protein or proteins.[1]

References

  1. A DNA fragment containing the groE genes can suppress mutations in the Escherichia coli dnaA gene. Jenkins, A.J., March, J.B., Oliver, I.R., Masters, M. Mol. Gen. Genet. (1986) [Pubmed]
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