Spermidine Biosynthesis During Germination and Subsequent Vegetative Growth of Bacillus megaterium Spores

AUTOR(ES)

Setlow, Peter

RESUMO

Spermidine biosynthesis was extremely low early in germination of Bacillus megaterium spores and the spermidine level remained constant. Rapid synthesis began after 130 min and thereafter accounted for the increase in spermidine level which began at this time. Biosynthesis was greatly (>84%) diminished by exogenous spermine or spermidine. Arginine and ornithine were both converted efficiently into spermidine, but arginine was the more immediate precursor as shown by isotope competition studies and by the absence of ornithine decarboxylase and the presence of arginine decarboxylase. Exogenous putrescine was not incorporated into spermidine, although it was taken up rapidly and degraded.

Documentos Relacionados

• Glucose catabolism during germination of Bacillus megaterium spores.
• Glucose-triggered germination of Bacillus megaterium spores.
• Germination and peptidoglycan solubilization in Bacillus megaterium spores.
• Levels of oxidized and reduced pyridine nucleotides in dormant spores and during growth, sporulation, and spore germination of Bacillus megaterium.
• Polyamine Levels During Growth, Sporulation, and Spore Germination of Bacillus megaterium