Structural consequences of cysteinylation of Cu/Zn-superoxide dismutase.
Structural consequences of cysteinylation of Cu/Zn-superoxide dismutase.
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DOI:
10.1021/bi400613h
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发表时间:
2013-09-10
期刊:
影响因子:
2.9
通讯作者:
Agar, Jeffrey N.
中科院分区:
文献类型:
--
作者:
Auclair, Jared R.;Brodkin, Heather R.;D'Aquino, J. Alejandro;Petsko, Gregory A.;Ringe, Dagmar;Agar, Jeffrey N.
The metalloenzyme Cu/Zn-superoxide dismutase (SOD1) catalyzes the reduction of superoxide anions into molecular oxygen and hydrogen peroxide. Hydrogen peroxide can oxidize SOD1, resulting in aberrant protein conformational changes, disruption of SOD1 function, and DNA damage. Cells may have evolved mechanisms of regulation that prevent such oxidation. We observed that cysteinylation of Cysteine 111 (Cys111) of SOD1 prevents oxidation by peroxide . In this article, we characterize cysteinylated SOD1 using differential scanning fluorimetry and X-ray crystallography. The stoichiometry of binding was one cysteine per SOD1 dimer, and there does not appear to be free volume for a second cysteine without disrupting the dimer interface. Much of the three dimensional structure of SOD1 is unaffected by cysteinylation. However, local conformational changes are observed in the cysteinylated monomer that include changes in conformation of the electrostatic loop (loop VII; residues 133-144) and the dimer interface (loop VI; residues 102-115). In addition, our data shows how cysteinylation precludes oxidation of Cysteine 111 and suggests possible cross-talk between the dimer interface and the electrostatic loop.
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DOI:
10.1107/s0907444904019158
发表时间:
2004-12-01
影响因子:
2.2
作者:
Emsley, P;Cowtan, K
通讯作者:
Cowtan, K
影响因子:
4.8
作者:
Molnar, Kathleen S.;Karabacak, N. Murat;Agar, Jeffrey N.
通讯作者:
Agar, Jeffrey N.
影响因子:
5.6
作者:
Hornberg, Andreas;Logan, Derek T.;Oliveberg, Mikael
通讯作者:
Oliveberg, Mikael
影响因子:
2
作者:
Kleinova, M;Belgacem, O;Allmaier, G
通讯作者:
Allmaier, G
DOI:
10.1107/s0907444903007947
发表时间:
2003-07-01
期刊:
ACTA CRYSTALLOGRAPHICA SECTION D-BIOLOGICAL CRYSTALLOGRAPHY
影响因子:
--
作者:
Padilla, JE;Yeates, TO
通讯作者:
Yeates, TO