Site-specific interaction between α-synuclein and membranes probed by NMR-observed methionine oxidation rates.
Site-specific interaction between α-synuclein and membranes probed by NMR-observed methionine oxidation rates.
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NMR观察到的蛋氨酸氧化速率探测的α-突触核蛋白和膜之间的位点特异性相互作用。
DOI:
10.1021/ja312415q
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发表时间:
2013-02-27
影响因子:
15
通讯作者:
Bax, Ad
中科院分区:
文献类型:
--
作者:
Maltsev, Alexander S.;Chen, Jue;Levine, Rodney L.;Bax, Ad
α-Synuclein (αS) is an intrinsically disordered protein that is water-soluble but also can bind negatively charged lipid membranes while adopting an α-helical conformation. Membrane affinity is increased by post-translational N-terminal acetylation, a common modification in all eukaryotic cells. In the presence of lipid vesicles containing a small fraction of peroxidized lipids, the N-terminal Met residues in αS (Met1 and Met5) rapidly oxidize while reducing the toxic lipid hydroperoxide to a nonreactive lipid hydroxide, whereas C-terminal Met residues remain unaffected. Met oxidation can be probed conveniently and quantitatively by NMR spectroscopy. The results show that oxidation of Met1 reduces the rate of oxidation of Met5 and vice versa as a result of decreased membrane affinity of the partially oxidized protein. The effect of Met oxidation on the αS–membrane affinity extends over large distances, as in the V49M mutant, oxidation of Met1 and Met5 strongly impacts the oxidation rate of Met49 and vice versa. When not bound to membrane, oxidized Met1 and Met5 of αS are excellent substrates for methionine sulfoxide reductase (Msr), thereby providing an efficient vehicle for water-soluble Msr enzymes to protect the membrane against oxidative damage.
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影响因子:
2.9
作者:
Maltsev AS;Ying J;Bax A
通讯作者:
Bax A
DOI:
10.1097/00005072-199608000-00004
发表时间:
1996-08-01
影响因子:
3.2
作者:
Irizarry, MC;Kim, TW;Hyman, BT
通讯作者:
Hyman, BT
影响因子:
2.9
作者:
Li, Chunyan;Takazaki, Shinya;Hamasaki, Naotaka
通讯作者:
Hamasaki, Naotaka
DOI:
10.1126/science.1227157
发表时间:
2012-11-16
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Luk KC;Kehm V;Carroll J;Zhang B;O'Brien P;Trojanowski JQ;Lee VM
通讯作者:
Lee VM
DOI:
10.1073/pnas.1005005107
发表时间:
2010-11-09
影响因子:
11.1
作者:
Greten-Harrison, Becket;Polydoro, Manuela;Chandra, Sreeganga S.
通讯作者:
Chandra, Sreeganga S.