Tungsten-induced inactivation of molybdoenzymes in Anabaena

Kumar, Ashok ; Kumar, H. D. (1980) Tungsten-induced inactivation of molybdoenzymes in Anabaena Biochimica et Biophysica Acta (BBA) - Enzymology, 613 (1). pp. 244-248. ISSN 0005-2744

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Official URL: http://www.sciencedirect.com/science/article/pii/0...

Related URL: http://dx.doi.org/10.1016/0005-2744(80)90211-9


The effect of tungsten on growth and activity of two molybdoenzymes has been studied in a nitrogen-fixing heterocystous cyanobacterium, Anabaena. Sodium tungstate inhibited growth and inactivated nitrogenase and nitrate reductase. The activity of both enzymes was restored by the addition of molybdenum. Tungstate treatment caused increase in heterocyst frequency both in NO3- medium and in medium free of combined nitrogen. These results suggest that tungstate treatment inactivates the molybdoenzymes in this cyanobacterium.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Molybdoenzyme; Nitrogenase; Nitrate Reductase; Heterocyst; (Anabaena)
ID Code:90549
Deposited On:10 May 2012 12:41
Last Modified:10 May 2012 12:41

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