Contiguous Organization of Nitrogenase Genes in a Heterocystous Cyanobacterium | Zendy

Barry Saville | Zendy; Neil A. Straus | Zendy; John R. Coleman | Zendy

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Contiguous Organization of Nitrogenase Genes in a Heterocystous Cyanobacterium

Author(s) -

Barry Saville,

Neil A. Straus,

John R. Coleman

Publication year - 1987

Publication title -

plant physiology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.554

H-Index - 312

eISSN - 1532-2548

pISSN - 0032-0889

DOI - 10.1104/pp.85.1.26

Subject(s) - nitrogenase , cyanobacteria , biology , nitrogen fixation , gene , gene cluster , homology (biology) , anabaena , heterocyst , genomic dna , genetics , biochemistry , bacteria

The organization of the three structural nitrogen fixation (nif) genes that encode nitrogenase (nif K and nif D) and nitrogenase reductase (nif H) have been examined in a number of cyanobacteria. Hybridization of Anabaena 7120 nif gene probes to restriction endonuclease-digested genomic DNA has shown (a) that cyanobacteria incapable of N(2) fixation have no regions of DNA with significant homology to the three nif probes, (b) that Pseudanabaena sp., a nonheterocystous cyanobacterium, has a contiguous nif KDH gene cluster, and (c) that in contrast with other heterocystous cyanobacteria, Fischerella sp. has a contiguous nif KDH gene cluster.

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