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Journal Articles Molecular Biology and Evolution Year : 1992

Nucleotide sequence of nifD from Frankia alni strain ArI3: phylogenetic inferences

P. Normand
  • Function : Author
B. Cournoyer
P. Simonet
  • Function : Author

Abstract

The complete nucleotide sequence of the nifD gene encoding the alpha subunit of component I of nitrogenase from Frankia alni strain ArI3 was determined. The coding region is 1,458 bp in length and encodes a polypeptide of 486 residues with a predicted molecular weight of 53,500. Phylogenetic inferences with 12 complete published nifD sequences were drawn using a variety of approaches. Frankia nifD clusters with proteobacteria rather than with Clostridium pasteurianum, the other Gram-positive bacterium studied. Extant eubacterial nif genes seem to have at least three distinct evolutionary origins as a result of ancient gene duplications. Within the Gram-positive bacterial phylum, functional nif genes descend from different duplicates.

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hal-00698088 , version 1 (16-05-2012)

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P. Normand, Manolo Gouy, B. Cournoyer, P. Simonet. Nucleotide sequence of nifD from Frankia alni strain ArI3: phylogenetic inferences. Molecular Biology and Evolution, 1992, 9 (3), pp.495-506. ⟨10.1093/oxfordjournals.molbev.a040737⟩. ⟨hal-00698088⟩
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