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Nit-3, the structural gene of nitrate reductase in Neurospora crassa: nucleotide sequence and regulation of mRNA synthesis and turnover

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Summary

The nit-3 gene of the filamentous fungus Neurospora crassa encodes the enzyme nitrate reductase, which catalyzes the first reductive step in the highly regulated nitrate assimilatory pathway. The nucleotide sequence of nit-3 was determined and translates to a protein of 982 amino acid residues with a molecular weight of approximately 108 kDa. Comparison of the deduced nit-3 protein sequence with the nitrate reductase protein sequences of other fungi and higher plants revealed that a significant amount of homology exists, particularly within the three cofactor-binding domains for molybdenum, heme and FAD. The synthesis and turnover of the nit-3 mRNA were also examined and found to occur rapidly and efficiently under changing metabolic conditions.

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Communicated by C.A. van den Handel

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Okamoto, P.M., Fu, YH. & Marzluf, G.A. Nit-3, the structural gene of nitrate reductase in Neurospora crassa: nucleotide sequence and regulation of mRNA synthesis and turnover. Molec. Gen. Genet. 227, 213–223 (1991). https://doi.org/10.1007/BF00259673

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