Open AccessSuperoxide dismutases of Azotobacter vinelandii and other aerobic, free‐living nitrogen‐fixing bacteria
Author(s) -
Moore Edward R.B.,
Norrod E.Pinina,
Jurtshuk Peter
Publication year - 1984
Publication title -
fems microbiology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.899
H-Index - 151
eISSN - 1574-6968
pISSN - 0378-1097
DOI - 10.1111/j.1574-6968.1984.tb01316.x
Subject(s) - azotobacter vinelandii , azotobacter chroococcum , superoxide dismutase , azospirillum brasilense , diazotroph , bacteria , strain (injury) , microbiology and biotechnology , chemistry , catalase , biology , biochemistry , nitrogen fixation , enzyme , nitrogenase , genetics , anatomy
Cell‐free extracts obtained from nitrogen‐fixing cells of organisms of the family Azotobacteriaceae were analyzed for superoxide dismutases (SOD). For all the representative organisms examined, unusually high specific activities for SOD were recorded. Single Fe‐containing SOD were found in Azotobacter vinelandii (5 strains), A. chroococcum (2 strains), A. beijerinckii (1 strain), Azomonas macrocytogenes (2 strains), and Derxia gummosa (2 strains). Highly active, single Mn‐containing SOD were found in all of 6 Beijerinckia strains examined ( B. indica, B. lacticogenes, B. mobilis, B. fluminensis, B. derxii and B. venezuelae ). Multiple SOD were found for Azomonas agilis (Mn‐SOD and 2 Fe‐SOD), A. insignis (Mn‐SOD, Fe‐SOD) and Azospirillum lipoferum (2 Fe‐SOD) and Azospirillum brasilense (Mn‐SOD and 2 Fe‐SOD).