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Functional significance of the Cu,ZnSOD in Escherichia coli.

Abstract：

:Diethyl dithiocarbamate (DDC) was used to inhibit the copper- and zinc- containing superoxide dismutase (Cu,ZnSOD) of Escherichia coli in order to expose its physiological function. DDC inhibited the aerobic growth of a sodA sodB mutant much more than it did the growth of a SOD-replete parental strain and this inhibitory effect was oxygen-dependent. The SOD mimic MnTMPyP markedly diminished the growth inhibitory effect of DDC. Transfer of the sodA sodB strain from anaerobic to aerobic conditions induced fumarase C, which is a member of the soxRS regulon. DDC augmented this induction. These results indicate that the Cu,ZnSOD provides a defense against oxidative stress, which is more important to the sodA sodB mutant than to its SOD-replete parental strain.

journal_name

Arch Biochem Biophys

journal_title

Archives of biochemistry and biophysics

authors

Benov L,Fridovich I

doi

10.1006/abbi.1996.0117

subject

Has Abstract

pub_date

1996-03-15 00:00:00

pages

249-53

issue

2

eissn

0003-9861

issn

1096-0384

pii

S0003-9861(96)90117-4

journal_volume

327

pub_type

杂志文章

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