Mapping of genes determining nonpermissiveness and host-specific restriction to bacteriophages in Bacillus subtilis Marburg
- 1 January 1979
- journal article
- research article
- Published by Springer Nature in Molecular Genetics and Genomics
- Vol. 170 (2) , 117-122
- https://doi.org/10.1007/bf00337785
Abstract
Bacillus subtilis Marburg is nonpermissive for the multiplication of bacteriophages SP10 and ϕNR2. A permissive mutant was derived from the Marburg strain, and the genetic determinants of nonpermissiveness were analyzed by PBS1 transduction. The simultaneous presence of two genes as mutant alleles, nonA and nonB, was necessary for permissiveness. The gene nonA is linked very closely to rfm (cotransfer: 95%); nonB is located between dal and purB (cotransfer of nonB and purB6: 48%). The genetic determinant of host-specific restriction intrinsic to the Marburg strain (hsrM) was found to be identical or very closely linked to nonB. The segregation of nonB and hsrM has never been observed in the course of transduction analysis. The mutation, hsrM1, diminishes the restriction activity, but not the host-controlled modification.Keywords
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