ArticlePlant physiology2016
A Salt-Inducible Mn-Catalase (KatB) Protects Cyanobacterium from Oxidative Stress.
Article in Plant physiology, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
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10 citing papers in PubMed, 40 citations in OpenAlex.
- Microorganisms' perception, scavenging, and adaptation to reactive oxygen species signals in microbe-plant interactions.World journal of microbiology & biotechnology · 2025Review
- miRNAs and Their Target Genes Play a Critical Role in Response to Heat Stress in Cynodon dactylon (L.) Pers.Molecular biotechnology · 2023Article
- Differential catalase activity and tolerance to hydrogen peroxide in the filamentous cyanobacteria Nostoc punctiforme ATCC 29133 and Anabaena sp. PCC 7120.Archives of microbiology · 2022Article
- Article
- Nitrogen Sources and Iron Availability Affect Pigment Biosynthesis and Nutrient Consumption inMicroorganisms · 2021Article
- Cohnella abietis sp. nov., isolated from Korean fir (Abies koreana) rhizospheric soil of Halla mountain.Journal of microbiology (Seoul, Korea) · 2019Article
- Metalloproteins in the Biology of Heterocysts.Life (Basel, Switzerland) · 2019Review
- Functional Identification of Salt-Stress-Related Genes Using the FOX Hunting System fromInternational journal of molecular sciences · 2018Article
- Development of an Expression Vector to Overexpress or Downregulate Genes inJournal of fungi (Basel, Switzerland) · 2018Article
- Cyanobacterial Mn-catalase 'KatB': Molecular link between salinity and oxidative stress resistance.Communicative & integrative biology · 2016Article
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Authors and funding
4 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Catalases, enzymes that detoxify H2O2, are widely distributed in all phyla, including cyanobacteria. Unlike the heme-containing catalases, the physiological roles of Mn-catalases remain inadequately characterized. In the cyanobacterium Anabaena, pretreatment of cells with NaCl resulted in unusually enhanced tolerance to oxidative stress. On exposure to H2O2, the NaCl-treated Anabaena showed reduced formation of reactive oxygen species, peroxides, and oxidized proteins than the control cells (i.e. not treated with NaCl) exposed to H2O2. This protective effect correlated well with the substantial increase in production of KatB, a Mn-catalase. Addition of NaCl did not safeguard the katB mutant from H2O2, suggesting that KatB was indeed responsible for detoxifying the externally added H2O2. Moreover, Anabaena deficient in KatB was susceptible to oxidative effects of salinity stress. The katB gene was strongly induced in response to osmotic stress or desiccation. Promoter-gfp analysis showed katB to be expressed only in the vegetative cells but not in heterocysts. Biochemically, KatB was an efficient, robust catalase that remained active in the presence of high concentrations of NaCl. Our findings unravel the role of Mn-catalase in acclimatization to salt/oxidative stress and demonstrate that the oxidative stress resistance of an organism can be enhanced by a simple compound such as NaCl.
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