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Organization of potential alternative nitrogenase genes from Clostridium pasteurianum. 1993

F Zinoni, and R M Robson, and R L Robson
Department of Biochemistry, University of Georgia, Athens 30602.

A 3.3 kb HindIII genomic DNA fragment from Clostridium pasteurianum ATCC 6013 which hybridized to the anfDGK genes for the Fe-only 'alternative' nitrogenase from Azotobacter vinelandii was cloned. Open reading frames (ORFs D, G, and K) with high sequence identity to anfD, anfG, and part of anfK were located in the nucleotide sequence obtained for 2494 bp of this fragment. In C. pasteurianum, ORFD maps approximately 1.8 kb downstream of nifH3 and is transcribed in the same direction. There was no evidence for additional copies of ORFDGK-like sequences in the genome of C. pasteurianum, other than those encoding the Mo-nitrogenase. Physiological and biochemical studies suggest that a nitrogenase not requiring molybdenum may occur in C. pasteurianum. This enzyme is probably encoded by nifH3 and ORFs D, G, and K identified here.

UI MeSH Term Description Entries
D008969 Molecular Sequence Data Descriptions of specific amino acid, carbohydrate, or nucleotide sequences which have appeared in the published literature and/or are deposited in and maintained by databanks such as GENBANK, European Molecular Biology Laboratory (EMBL), National Biomedical Research Foundation (NBRF), or other sequence repositories. Sequence Data, Molecular,Molecular Sequencing Data,Data, Molecular Sequence,Data, Molecular Sequencing,Sequencing Data, Molecular
D009591 Nitrogenase An enzyme system that catalyzes the fixing of nitrogen in soil bacteria and blue-green algae (CYANOBACTERIA). EC 1.18.6.1. Dinitrogenase,Vanadium Nitrogenase,Nitrogenase, Vanadium
D003013 Clostridium A genus of motile or nonmotile gram-positive bacteria of the family Clostridiaceae. Many species have been identified with some being pathogenic. They occur in water, soil, and in the intestinal tract of humans and lower animals.
D000595 Amino Acid Sequence The order of amino acids as they occur in a polypeptide chain. This is referred to as the primary structure of proteins. It is of fundamental importance in determining PROTEIN CONFORMATION. Protein Structure, Primary,Amino Acid Sequences,Sequence, Amino Acid,Sequences, Amino Acid,Primary Protein Structure,Primary Protein Structures,Protein Structures, Primary,Structure, Primary Protein,Structures, Primary Protein
D001483 Base Sequence The sequence of PURINES and PYRIMIDINES in nucleic acids and polynucleotides. It is also called nucleotide sequence. DNA Sequence,Nucleotide Sequence,RNA Sequence,DNA Sequences,Base Sequences,Nucleotide Sequences,RNA Sequences,Sequence, Base,Sequence, DNA,Sequence, Nucleotide,Sequence, RNA,Sequences, Base,Sequences, DNA,Sequences, Nucleotide,Sequences, RNA
D016366 Open Reading Frames A sequence of successive nucleotide triplets that are read as CODONS specifying AMINO ACIDS and begin with an INITIATOR CODON and end with a stop codon (CODON, TERMINATOR). ORFs,Protein Coding Region,Small Open Reading Frame,Small Open Reading Frames,sORF,Unassigned Reading Frame,Unassigned Reading Frames,Unidentified Reading Frame,Coding Region, Protein,Frame, Unidentified Reading,ORF,Open Reading Frame,Protein Coding Regions,Reading Frame, Open,Reading Frame, Unassigned,Reading Frame, Unidentified,Region, Protein Coding,Unidentified Reading Frames

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