Open AccessBacterial-type ferredoxin genes in the nitrogen fixation regions of the cyanobacterium Anabaena sp. strain PCC 7120 and Rhizobium meliloti
Author(s) -
Martin E. Mulligan,
William J. Buikema,
Robert Haselkorn
Publication year - 1988
Publication title -
journal of bacteriology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.652
H-Index - 246
eISSN - 1067-8832
pISSN - 0021-9193
DOI - 10.1128/jb.170.9.4406-4410.1988
Subject(s) - ferredoxin , biology , anabaena , nitrogen fixation , nitrogenase , rhizobium , cyanobacteria , diazotroph , gene , microbiology and biotechnology , strain (injury) , biochemistry , bacteria , genetics , enzyme , anatomy
The nucleotide sequence of a region located downstream of the nifB gene, both in the cyanobacterium Anabaena sp. strain PCC 7120 and in Rhizobium meliloti, has been determined. This region contains a gene (fdxN) whose predicted polypeptide product strongly resembles typical bacterial ferredoxins. Cyanobacteria have not previously been shown to contain bacterial-type ferredoxins. The presence of this gene suggests that nitrogen-fixing cyanobacteria have at least four distinct ferredoxins.