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Nitrate reductase of Dunaliella parva

Electron donor specificity and heat activation

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Abstract

Nitrate reductase of the salt tolerant alga Dunaliella parva, in contrast to that of most green algae, can use NADPH as well as NADH as electron donor. Extracts of cells contained various amounts of latent nitrate reductase. The latent enzyme could be activated at 45°C but only in the presence of flavine adenine dinucleotide. The heat activated enzyme did not require flavine adenine dinucleotide for activity and was fully active with NADH, NADPH or reduced flavine mononucleotide as electron donors.

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Abbreviations

FAD:

flavine adenine dinucleotide

FMNH:

reduced flavine mononucleotide

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Authors and Affiliations

  1. Nuclear Research Centre-Negev, Atomic Energy Commission, Beer-Sheva, Israel

    Yair M. Heimer

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  1. Yair M. Heimer
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Heimer, Y.M. Nitrate reductase of Dunaliella parva . Arch. Microbiol. 103, 181–183 (1975). https://doi.org/10.1007/BF00436347

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  • DOI: https://doi.org/10.1007/BF00436347

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