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. 1988 Nov;120(3):625–635. doi: 10.1093/genetics/120.3.625

Chromosomal Organization of Rrna Operons in Bacillus Subtilis

E D Jarvis 1, R L Widom 1, G LaFauci 1, Y Setoguchi 1, I R Richter 1, R Rudner 1
PMCID: PMC1203540  PMID: 2465199

Abstract

Integrative mapping with vectors containing ribosomal DNA sequences were used to complete the mapping of the 10 rRNA gene sets in the endospore forming bacterium Bacillus subtilis. Southern hybridizations allowed the assignment of nine operons to distinct BclI restriction fragments and their genetic locus identified by transductional crosses. Nine of the ten rRNA gene sets are located between 0 and 70° on the genomic map. In the region surrounding cysA14, two sets of closely spaced tandem clusters are present. The first (rrnJ and rrnW) is located between purA16 and cysA14 closely linked to the latter; the second (rrnI, rrnH and rrnG) previously mapped within this area is located between attSPO2 and glpT6. The operons at or near the origin of replication (rrnO,rrnA and rrnJ,rrnW) represent ``hot spots'' of plasmid insertion.

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Selected References

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