Cloning of the gene for phosphoenolpyruvate carboxylase from Azotobacter chroococcum, an enzyme important in aerobic nitrogen fixation

1987 ◽  
Vol 208 (3) ◽  
pp. 481-484 ◽  
Author(s):  
Juan Romos ◽  
Robert L. Robson
Keyword(s):  
Nitrogen Fixation ◽  
Phosphoenolpyruvate Carboxylase ◽  
Azotobacter Chroococcum

Metabolism of glycolic acid by Azotobacter chroococcum PRL H62

1973 ◽  
Vol 19 (3) ◽  
pp. 321-324 ◽  
Author(s):  
W. G. W. Kurz ◽  
T. A. G. LaRue
Keyword(s):  
Nitrogen Fixation ◽  
Dicarboxylic Acid ◽  
Glycolic Acid ◽  
Tca Cycle ◽  
Azotobacter Chroococcum ◽  
Acid Cycle ◽  
Isocitric Dehydrogenase ◽  
Tca Cycle Enzymes ◽  
The Tca Cycle ◽  
Reduced Nitrogen

When Azotobacter chroococcum grows on glycolic acid as sole C source, it cannot utilize N2 and must be provided with reduced nitrogen. Glycolic acid is metabolized via Kornberg's dicarboxylic acid cycle. The TCA cycle enzymes are low in activity, and isocitric dehydrogenase is absent. It is likely that isocitric dehydrogenase is the source of reductant for nitrogen fixation by Azotobacter nitrogenase.

Note on the effect of temperature on a mixed culture of two organisms in symbiotic relation

1939 ◽  
Vol 29 (2) ◽  
pp. 302-305 ◽  
Author(s):  
E. H. Richards
Keyword(s):  
Nitrogen Fixation ◽  
Mixed Culture ◽  
Azotobacter Chroococcum ◽  
Mixed Cultures ◽  
Effect Of Temperature ◽  
Two Temperatures ◽  
Symbiotic Relation

1. A study was made of nitrogen-fixation byAzotobacter chroococcumalone in a medium containing dextrose (which it can utilize) and in mixture with a coliform organism on a medium containing no carbohydrate except starch, whichAzotobactercannot utilize unless it be hydrolysed by the coliform organism or some other agency.2. The amount of nitrogen fixed in the mixed cultures was found to be maximal at two temperatures, and a discussion is given of the causes thought to be operative in producing the double maximum.

Cloning and organisation of some genes for nitrogen fixation from Azotobacter chroococcum and their expression in Klebsiella pneumoniae

1984 ◽  
Vol 197 (2) ◽  
pp. 318-327 ◽  
Author(s):  
Robert Jones ◽  
Paul Woodley ◽  
Robert Robson
Keyword(s):  
Nitrogen Fixation ◽  
Klebsiella Pneumoniae ◽  
Azotobacter Chroococcum

scholarly journals Isolation and Properties of Mutants of Azotobacter chroococcum Defective in Aerobic Nitrogen Fixation

Microbiology ◽  
1985 ◽  
Vol 131 (6) ◽  
pp. 1449-1458 ◽  
Author(s):  
J. L. RAMOS ◽  
R. L. ROBSON
Keyword(s):  
Nitrogen Fixation ◽  
Azotobacter Chroococcum
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