Article
A constitutive O6-methylguanine-DNA methyltransferase of Rhizobium meliloti.
Mutation research - 1 May 1990
Kaufman A, Walker G C
Abstract excerpt
We have identified a DNA methyltransferase activity of the nitrogen-fixing bacterium, Rhizobium meliloti, that repairs O6-methylguanine lesions. Repair of the O6-methylguanine residue results in transfer of the methyl group to a cysteine residue of a 28,000-dalton protein. The O6-methyltransferase activity is expressed constitutively and R. meliloti does not exhibit an adaptive response to alkylating agents.
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