Regulation of the oxidative stress protective enzymes, catalase and superoxide dismutase in Xanthomonas — a review

Xanthomonas showed atypical regulation of catalase (Kat) and superoxide dismutase with respect to growth phase and response to various inducers. The highest levels of both enzymes were detected during early log phase of growth and declined as growth continued. This was in contrast to resistance leve...

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Bibliographic Details
Published in:Gene 1996-11, Vol.179 (1), p.33-37
Main Authors: Loprasert, Suvit, Vattanaviboon, Paiboon, Praituan, Wipa, Chamnongpol, Sangpen, Mongkolsuk, Skorn
Format: Article
Language:English
Subjects:
CATALASA
CATALASE
Catalase - biosynthesis
CRECIMIENTO
CROISSANCE
ESTRES
GENE
Gene Expression Regulation, Bacterial
GENES
GROWTH
Oxidative Stress - genetics
OXIGENO
OXYGEN
OXYGENE
Peroxides
Phytopathogen
PLANT RESPONSE
Reactive oxygen species
REPONSE DE LA PLANTE
RESPUESTA DE LA PLANTA
Species Specificity
STRESS
SUPEROXIDE DISMUTASE
Superoxide Dismutase - biosynthesis
SUPEROXIDO DISMUTASA
SUPEROXYDE DISMUTASE
Xanthomonas
Xanthomonas - enzymology
Xanthomonas - genetics
Xanthomonas - growth & development
XANTHOMONAS CAMPESTRIS
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Summary:Xanthomonas showed atypical regulation of catalase (Kat) and superoxide dismutase with respect to growth phase and response to various inducers. The highest levels of both enzymes were detected during early log phase of growth and declined as growth continued. This was in contrast to resistance levels to superoxides, H 2O 2 and organic peroxides, which reached maximum levels during stationary phase. Xanthomonas catalase was induced over six fold by superoxide generators and methyl methane sulfonate but weakly by H 2O 2. The regulation pattern of these enzymes could be important during plant/microbe interactions. To facilitate elucidation of Xanthomonas kat gene regulation, highly conserved regions of monofuctional Kat amino acid sequences were used to synthesize oligodeoxyribonucleotide primers for use in PCR reactions with Xanthomonas genomic DNA as templates. The Xanthomonas-specific PCR kat probe was used to isolate a functional kat from Xanthomonas campestris pv. phaseoli.
ISSN:0378-1119
1879-0038
DOI:10.1016/S0378-1119(96)00427-1