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J. Bacteriol., Sep 1995, 5232-5237, Vol 177, No. 18
Copyright © 1995, American Society for Microbiology

Genetic characterization of forty ionizing radiation-sensitive strains of Deinococcus radiodurans: linkage information from transformation

V Mattimore, KS Udupa, GA Berne and JR Battista
Department of Microbiology, Louisiana State University, Baton Rouge 70803, USA.

Natural transformation was used to help define a collection of ionizing radiation-sensitive strains of Deinococcus radiodurans. Three putative rec mutations were identified, as were three pol alleles. Forty of the ionizing radiation-sensitive strains were placed into 16 linkage groups, and evidence obtained indicates that each linkage group consists of a cluster of mutations not more than 1,000 bp apart. In addition, a new class of D. radiodurans mutant was described that, although radioresistant, appears to recover from ionizing radiation- induced DNA damage slowly relative to other strains of D. radiodurans.

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