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Genome-wide identification and characterization of superoxide dismutases in four oyster species reveals functional differentiation in response to biotic and abiotic stress
Summary
Genome-wide analysis of superoxide dismutase (SOD) genes in four oyster species revealed that most extracellular Cu/Zn-SOD proteins appear to have lost enzymatic activity, with only one cytosolic form likely retaining function. Expression patterns differed in response to biotic and abiotic stressors, suggesting functional differentiation among SOD family members that may serve as biomarkers of environmental stress.
These findings revealed the most extracellular Cu/Zn-SOD proteins appeared to lose SOD enzyme activity in oysters. Further, our study revealed that only one cytosolic Cu/Zn-SOD (cg_XM_034479061.1) may conserve enzymatic activity of SOD. Moreover, the expression patterns of these genes varied in response to different stressors, which may be due to the cis-elements in the promoter. This study provides important insights into the mechanisms through which oysters adapt to harsh intertidal conditions, as well as potential biomarkers of stress response in related species.
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