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- W2892064807 abstract "Abstract Despite a recent increase in interest towards phytoglobins and their importance in plants, much is still unknown regarding their biochemical/biophysical properties and physiological roles. The present study presents data on three recombinant Arabidopsis phytoglobins in terms of their UV-vis and Raman spectroscopic characteristics, redox state control, redox potentials and autoxidation rates. The latter are strongly influenced by pH for all three hemoglobins – (with a fundamental involvement of the distal histidine), as well as by added anion concentrations – suggesting either a process dominated by nucleophilic displacement of superoxide for AtHb2 or an inhibitory effect for AtHb1 and AtHb3. Reducing agents, such as ascorbate and glutathione, are found to either enhance– (presumably via direct electron transfer or via allosteric regulation) or prevent autoxidation. HbFe 3+ reduction was possible in the presence of high (presumably not physiologically relevant) concentrations of NADH, glutathione and ascorbate, with differing behaviors for the three globins. The iron coordination sphere is found to affect the autoxidation, redox state interconversion and redox potentials in these three phytoglobins." @default.
- W2892064807 created "2018-09-27" @default.
- W2892064807 creator A5007670343 @default.
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- W2892064807 date "2018-09-12" @default.
- W2892064807 modified "2023-10-18" @default.
- W2892064807 title "Redox control and autoxidation of class 1, 2 and 3 phytoglobins from Arabidopsis thaliana" @default.
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- W2892064807 doi "https://doi.org/10.1038/s41598-018-31922-4" @default.
- W2892064807 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6135765" @default.
- W2892064807 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30209406" @default.
- W2892064807 hasPublicationYear "2018" @default.
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