Molecular cloning and nucleotide sequence of the mutT mutator of Escherichia coli that causes A:T to C:G transversion
- 1 January 1987
- journal article
- research article
- Published by Springer Nature in Molecular Genetics and Genomics
- Vol. 206 (1), 9-16
- https://doi.org/10.1007/bf00326530
Abstract
The Escherichia coli mutator gene mutT, which causes A:T→C:G transversion, was cloned in pBR 322. mutT+ plasmids carry a 0.9 kb PvuII DNA fragment derived from the E. coli chromosome. Specific labelling of plasmid-encoded proteins by the maxicell method revealed that mutT codes for a polypeptide of about 15,000 daltons. The protein was overproduced when the mutT gene was placed under the control of the lac regulatory region on a multicopy runaway plasmid. The nucleotide sequence of the mutT gene was determined by the dideoxy method.Keywords
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