NDLI: Cloning of the sodA Gene from Corynebacterium melassecola and Role of Superoxide Dismutase in Cellular Viability

Content Provider	PubMed Central
Author	Muriel, Merkamm Guyonvarch, Armel
Copyright Year	2001
Abstract	The sodA gene encoding the Corynebacterium melassecola manganese-cofactored superoxide dismutase (SOD) has been cloned in Escherichia coli and sequenced. The gene is transcribed monocistronically; the predicted polypeptide is 200 amino acids long and associates in a homotetrameric, manganese-dependent form, able to complement an SOD-deficient E. coli mutant. A second open reading frame, coding for a putative 217-amino-acid protein with high homology to peptide methionine sulfoxide reductases from various origins, has been identified immediately upstream of sodA in the opposite transcription orientation. The sodA gene was inactivated by insertion of an integrative vector carrying a kanamycin resistance gene. The growth rate of the SOD-deficient integrant was only slightly affected in BHI rich medium as well as in BMCG chemically defined medium, but was strongly affected by the presence of the redox-cycling agent paraquat. The SOD deficiency had, on the other hand, a deleterious effect on viability as soon as the culture entered the stationary phase of growth in BHI medium. Surprisingly, SOD deficiency was able to rescue the dramatic loss of viability observed for the wild-type strain in BMCG synthetic medium when glucose was not the limiting growth factor.
Related Links	http://dx.doi.org/10.1128/jb.2001.183.4.1284-1295.2001
Ending Page	1295
Page Count	12
Starting Page	1284
File Format	PDF
ISSN	00219193
e-ISSN	10985530
Journal	Journal of Bacteriology
Issue Number	4
Volume Number	183
Language	English
Publisher	American Society for Microbiology
Publisher Date	2001-02-15
Access Restriction	Open
Rights Holder	American Society for Microbiology
Subject Keyword	Molecular Biology Microbiology Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Molecular Biology Microbiology

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