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Molecular mechanism on cadmium-induced activity changes of catalase and superoxide dismutase.

Abstract：

:Cadmium contributes to adverse effects of organisms probably because of its ability to induce oxidative stress via alterations in activities of antioxidant enzymes catalase (CAT) and superoxide dismutase (SOD), but their molecular mechanisms remain unclear. We investigated the molecular mechanism of CAT and SOD response under Cd-induced oxidative stress in the liver of zebrafish. The enzyme activity changes observed in vitro were consistent with those seen in vivo, indicating the direct interaction of CAT and SOD with Cd contributes to their activity change in vivo. Further experiments utilizing multiple spectroscopic methods, isothermal titration calorimetry and a molecular docking study were performed to explore the mechanism of molecular interaction of CAT and SOD with Cd. Different interaction patterns were found that resulted in misfolding and changed the enzyme activities. Taken together, we suggest the misfolding of CAT and SOD contributes to their activity change under Cd-induced oxidative stress in vivo.

journal_name

Int J Biol Macromol

journal_title

International journal of biological macromolecules

authors

Wang J,Zhang H,Zhang T,Zhang R,Liu R,Chen Y

doi

10.1016/j.ijbiomac.2015.02.037

subject

Has Abstract

pub_date

2015-01-01 00:00:00

pages

59-67

eissn

0141-8130

issn

1879-0003

pii

S0141-8130(15)00123-3

journal_volume

77

pub_type

杂志文章

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