The essential nature of teichoic acids in Bacillus subtilis as revealed by insertional mutagenesis

Molecular & General Genetics : MGG
C MauëlD Karamata

Abstract

A 30 kb DNA segment from the region of the Bacillus subtilis strain 168 chromosome which contains most, if not all, loci specifically involved in teichoic acid biosynthesis, has been cloned. A restriction map was established to which genetic markers were assigned. Four loci, tagA, tagB, gtaA and gtaD, are located on a DNA segment of about 7 kb, whereas the gtaB locus lies some 10 kb distant. The tagA and tagB loci are apparently transcribed independently. Insertional mutagenesis, using integrational plasmids carrying relevant fragments from the tag region, provides strong evidence that biosynthesis of polyglycerol phosphate [poly(groP)], so far largely considered as a dispensable polymer, is in fact essential for growth.

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