Abstract:
:Diamino butanone (DAB), a competitive inhibitor of ornithine decarboxylase (ODC) a key enzyme in polyamine biosynthesis, inhibited the yeast to hyphae transition in Mucor rouxii, induced by transfer from anaerobiosis to aerobiosis, but not the opposite phenomenon. Addition of DAB to anaerobic yeast cells brought about a decrease in ODC and polyamine levels. In these conditions, the aerobic shift produced only a weak increase in ODC activity and no change in polyamine levels. DAB also blocked phorogenesis in M. rouxii and in Phycomyces blakesleeanus. At the effective concentrations DAB did not affect cell growth of either fungus. It is suggested that low, constant levels of ODC and polyamines are necessary for cell growth, and that high transient levels are required during the differentiative steps. DAB, at the concentrations used, affects this last process, but does not interfere with the maintenance level of polyamines.
journal_name
Arch Microbioljournal_title
Archives of microbiologyauthors
Martinez-Pacheco M,Rodriguez G,Reyna G,Calvo-Mendez C,Ruiz-Herrera Jdoi
10.1007/BF00444661subject
Has Abstractpub_date
1989-01-01 00:00:00pages
10-4issue
1eissn
0302-8933issn
1432-072Xjournal_volume
151pub_type
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