Abstract
Anacystis nidulans, a non-nitrogen-fixing cyanobacterium, can fulfill its nitrogen requirement by the assimilation of nitrate. The first step in the pathway, the reduction of nitrate to nitrite, is catalyzed by the molybdo-protein nitrate reductase. In this study, newly developed techniques for gene cloning in A. nidulans R2 were used for the isolation of two genes involved in nitrate reduction. One gene was cloned by complementation of the corresponding mutant; the other gene was picked up from a cosmid gene library by using a restriction fragment containing the transposon-inactivated gene as a probe. Both genes were unlinked single-copy chromosomal genes. Transformation studies provided evidence for the existence of a third locus involved in nitrate reduction.
MeSH Terms
Cloning, Molecular
Cyanobacteria/enzymology,genetics
DNA Restriction Enzymes
DNA Transposable Elements
Genes
Methylnitronitrosoguanidine/toxicity
Mutation
Nitrate Reductase (NADPH)
Nitrate Reductases/genetics
Nucleic Acid Hybridization
Plasmids
Chemicals
DNA Transposable Elements
Methylnitronitrosoguanidine
Nitrate Reductases
Nitrate Reductase (NADPH)
DNA Restriction Enzymes
Authors & Affiliations
6 authors, click to expand affiliations / ORCID
Kuhlemeier C J
Logtenberg T
Stoorvogel W
van Heugten H A
Borrias W E
van Arkel G A
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