1978
DOI: 10.1016/0304-4211(78)90113-x
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Glutamate dehydrogenases of unicellular green algae: Effects on nitrate and ammonium in vivo

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Cited by 11 publications
(6 citation statements)
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“…As with several other species of Chlorella (20,22,23,27), GDH in C. autotrophica appears to be present in two forms, a constitutive GDH which has low nucleotide specificity (22,27), and an inducible form highly specific for NADPH. Cells grown on NO3-appear to contain only the constitutive form, whereas the inducible NADPH-GDH is present in NH4+-grown cells, and increasing levels ofthis form were observed with increasing NH4' concentration (Table II).…”
Section: Discussionmentioning
confidence: 99%
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“…As with several other species of Chlorella (20,22,23,27), GDH in C. autotrophica appears to be present in two forms, a constitutive GDH which has low nucleotide specificity (22,27), and an inducible form highly specific for NADPH. Cells grown on NO3-appear to contain only the constitutive form, whereas the inducible NADPH-GDH is present in NH4+-grown cells, and increasing levels ofthis form were observed with increasing NH4' concentration (Table II).…”
Section: Discussionmentioning
confidence: 99%
“…Also, for some microalgae such as Platymonas striata (7) and Chiamydomonas reinhardii (6), only the activities of GS and GOGAT were found to be sufficient to carry out the required rate of nitrogen assimilation. However, many microalgae contain high levels ofGDH activities (9,20,(22)(23)(24)27) provided by Everest and Syrett (9) for NO3-grown Stichococcus bacillaris which has an inducible NADPH-GDH with a low Km for NH4' (KmaPP, 1 mM). Several strains of Chlorella are also found to contain an inducible NADPH-GDH; however, in this case the enzyme is synthesized in NH4-grown cells (9,20,22,23,27).…”
Section: Introductionmentioning
confidence: 99%
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“…The magnitude of the change in activity of biosynthetic glutamine synthetase is much less than the change in asparaginase, however, Previous work (20) (14) and Talley (31) who found that high concentrations of ammonium induced an NADPH-dependent glutamate dehydrogenase electrophoretically distinct from an NADH-dependent enzyme in Chlorella pyrenoidosa. Shatilov et al (29) found a constitutive glutamate dehydrogenase active with both NADH and NADPH in a variety of unicellular green algae. Several of these organisms possessed an ammonium-inducible NADPH-specific glutamate dehydrogenase (29) while others did not.…”
Section: Discussionmentioning
confidence: 99%