Identification of the minimal copper(II)-binding alpha-synuclein sequence.

Identification of the minimal copper(II)-binding alpha-synuclein sequence.
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DOI:
10.1021/ic901157w
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发表时间:
2009-10-05
影响因子:
4.6
通讯作者:
Lee, Jennifer C.
Lee, Jennifer C.
中科院分区:
化学2区
文献类型:
--
作者:
Jackson, Mark S.;Lee, Jennifer C.

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长期以来,帕金森病一直与环境因素有关,如过渡金属,最近与α-突触核蛋白(一种突触前蛋白)有关。使用含Dahan的肽,我们确定了最小的Cu(II)结合序列位于前四个残基MDV(F/W)内,由α-氨基末端锚定。此外,突变肽1-10(Lys→Arg)证实了Lys 6或Lys 10对于Cu(II)结合都不是必需的。有趣的是,Trp 4激发态衰减动力学测量的肽和蛋白质揭示了两种淬灭模式,可能产生两个不同的Cu(II)-多肽结构。
Parkinson’s disease has been long linked to environmental factors, such as transition metals and recently to α-synuclein, a presynaptic protein. Using tryptophan-containing peptides, we identified the minimal Cu(II)-binding sequence to be within the first four residues, MDV(F/W), anchored by the α-amino terminus. In addition, mutant peptide 1–10 (Lys→Arg) verified that neither Lys6 or Lys10 are necessary for Cu(II) binding. Interestingly, Trp4 excited-state decay kinetics measured for peptides and proteins reveal two quenching modes, possibly arising from two distinct Cu(II)-polypeptide structures.
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