ISSN:
1573-0972
Keywords:
Anabaena cycadeae
;
arginine
;
cyanobacterium
;
glutamine synthetase
;
nitrate reductase
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
Abstract Wild-type Anabaena cycadeae with normal glutamine synthetase (GS) activity utilized arginine as sole N source whereas a mutant strain lacking GS activity did not. Nitrate reductase (NR) activity, higher in the mutant strain than the wild-type strain, was inhibited by arginine though arginine-dependent NH 4 + generation was higher in the mutant strain than in the wild-type. This suggests that (1) NR activity is NO inf3 sup- -inducible and arginine-repressible; and (2) while GS activity is required for the assimilation of arginine as sole N-source, it is not required for arginine inhibition of NR activity.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00360885
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