Abstract:
:The mechanism of the massive extracellular production of citric and isocitric acids by Saccharomycopsis lipolytica grown on n-paraffins has been studied. When growth stops, because of nitrogen limitation, the intracellular concentration of ATP sharply rises whereas that of AMP and ADP decreases to a low level. At the same time production of acids begins. The activity of the NAD-dependent isocitrate dehydrogenase which requires AMP for activity becomes very low and prevents the oxidative function of the citric acid cycle whereas isocitrate lyase is not inhibited. As citrate synthase inhibition by ATP appears to be insufficient to stop n-paraffin degradation, citric and isocitric acids accumulation can take place. Massive excretion of these acids, however, probably still involves other physiological changes brought about by nitrogen limitation, possibly some permeabilization of the cell to these acids.
journal_name
Arch Microbioljournal_title
Archives of microbiologyauthors
Marchal R,Vandecasteele JP,Metche Mdoi
10.1007/BF00428588subject
Has Abstractpub_date
1977-05-13 00:00:00pages
99-104issue
1-2eissn
0302-8933issn
1432-072Xjournal_volume
113pub_type
杂志文章abstract::The gliding bacterium Herpetosiphon giganteus Hp a2 was shown to contain gamma-carotene, one monoglucosyloxy and two new diglucosyloxy carotenoids with a x-O-acyldiglucosyloxy carotenoid as main component. Flexirubin-like pigments could not be detected in this organism. As in the Myxobacterales and Cytophagales (Klein...
journal_title:Archives of microbiology
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journal_title:Archives of microbiology
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journal_title:Archives of microbiology
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journal_title:Archives of microbiology
pub_type: 杂志文章
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pub_type: 杂志文章
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更新日期:1978-05-30 00:00:00
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journal_title:Archives of microbiology
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journal_title:Archives of microbiology
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journal_title:Archives of microbiology
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journal_title:Archives of microbiology
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