Biochemical properties of CumA multicopper oxidase from plant pathogen, Pseudomonas syringae.
Biosci Biotechnol Biochem
; 85(9): 1995-2002, 2021 Aug 25.
Article
in En
| MEDLINE
| ID: mdl-34244699
Multicopper oxidases have a wide range of substrate specificity to be involved in various physiological reactions. Pseudomonas syringae, a plant pathogenic bacterium, has a multicopper oxidase, CumA. Multicopper oxidases have ability to degrade plant cell wall component, lignin. Once P. syringae enter apoplast and colonize, they start to disrupt plant immunity. Therefore, deeper understanding of multicopper oxidases from plant pathogens helps to invent measures to prevent invasion into plant cell, which brings agricultural benefits. Several biochemical studies have reported lower activity of CumA compared with other multicopper oxidase called CotA. However, the mechanisms underlying the difference in activity have not yet been revealed. In order to acquire insight into them, we conducted a biophysical characterization of PsCumA. Our results show that PsCumA has weak type I copper EPR signal, which is essential for oxidation activity. We propose that difference in the coordination of copper ions may decrease reaction frequency.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Oxidoreductases
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Plants
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Bacterial Proteins
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Copper
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Pseudomonas syringae
Language:
En
Journal:
Biosci Biotechnol Biochem
Year:
2021
Document type:
Article