[A new pleiotropic mutation affecting purine metabolism, sporulation and biosynthesis of exoenzymes in Bacillus subtilis].
A pleiotropic mutation (cpm) which is localised in the vicinity of the spoA gene of Bacillus subtilis chromosome has been described. The mutation inhibits spore formation, renders bacteria auxotrophic for adenine and tyrosine, increases sensitivity to antibiotics, decreases cell motility and the ability to grow on D-ribose and D-xylose, inhibits growth of bacteriophages PBS1 and AR9 as well as enhances activity of alkaline proteinase and alpha-amylase. At the same time, the cpm mutants acquire the ability to produce inosine. Inosine excretion is connected with more than 50- and 5-fold increase in activity of 5'-nucleotidase in respect to IMP and AMP, accordingly, and 10-fold decrease in activity of purine nucleoside phosphorylase. Biosynthesis of inosine and Ade- phenotype of the cpm mutant are not mediated by the change in activity of sAMP synthetase. The nature and mechanism of action of the cpm mutation are under discussion.
Maznitsa
I I
II
Nudler
A A
AA
Burd
G I
GI
D015720:5'-Nucleotidase / Q000378:metabolism; D000265:Adenylosuccinate Synthase / Q000378:metabolism; D001412:Bacillus subtilis / Q000502:physiology*; D007288:Inosine / Q000096:biosynthesis; D009154:Mutation / Q000235:genetics; D010641:Phenotype; D011683:Purine-Nucleoside Phosphorylase / Q000378:metabolism; D011687:Purines / Q000378:metabolism*; D012641:Selection, Genetic; D013170:Spores; D014161:Transduction, Genetic / Q000235:genetics
D011687:Purines; D007288:Inosine; D011683:Purine-Nucleoside Phosphorylase; D015720:5'-Nucleotidase; D000265:Adenylosuccinate Synthase
Novaia pleĭotropnaia mutatsiia, vliiaiushchaia na metabolizm purinov, sporoobrazovanie i biosintez ékzofermentov u Bacillus subtilis.