Intramolecular diffusion controls aggregation of the PAPf39 peptide.

Intramolecular diffusion controls aggregation of the PAPf39 peptide.
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DOI:
10.1016/j.bpc.2016.06.004
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发表时间:
2016-09
影响因子:
3.8
通讯作者:
Lapidus LJ
Lapidus LJ
中科院分区:
生物学4区
文献类型:
--
作者:
Srivastava KR;French KC;Tzul FO;Makhatadze GI;Lapidus LJ

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人前列腺酸性磷酸酶(PAP)的39个残基片段在精液中含量较高,容易形成纤维。以前的工作表明,随着前8个氨基酸残基的删除(主要是带电残基),纤化作用被加速,并假设纤化作用取决于这些肽的动力学。为了验证这一假设,我们测量了全长和8-残基缺失多肽在两个不同的PHS处的分子内扩散,并发现与纤化滞后时间相关。这些结果可以用一个简单的早期聚集阶段的动力学模型来解释,在这个模型中,寡聚作用受多肽重构率的控制。
The 39-residue fragment of human prostatic acidic phosphatase (PAP) is found in high concentrations in semen and easily form fibrils. Previous work has shown that fibrillization is accelerated with a deletion of the first 8, mostly charged residues and it was hypothesized that fibrillization depended on the dynamics of these peptides. To test this hypothesis we have measured the intramolecular diffusion of the full length and 8-residue deletion peptides at two different pHs and found a correlation with fibrillization lag time. These results can be explained by a simple kinetic model of the early stages of aggregation in which oligomerization is controlled by the rate of peptide reconfiguration.
DOI: 10.1021/bi301406d
发表时间: 2012-12-21
期刊: Biochemistry
影响因子: 2.9
作者:
French KC;Makhatadze GI
通讯作者: Makhatadze GI
DOI: 10.1063/1.439715
发表时间: 1980-01-01
影响因子: 4.4
作者:
SZABO, A;SCHULTEN, K;SCHULTEN, Z
通讯作者: SCHULTEN, Z
DOI: 10.1073/pnas.1109526109
发表时间: 2012-02-14
影响因子: 11.1
作者:
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通讯作者: Lapidus, Lisa J.
DOI: 10.1016/j.pep.2013.01.003
发表时间: 2013-04-01
影响因子: 1.6
作者:
Shanmuganathan, Aranganathan;Bishop, Anthony C.;Makhatadze, George I.
通讯作者: Makhatadze, George I.
DOI: 10.1039/c2mb25334h
发表时间: 2013-01-27
影响因子: --
作者:
Lapidus LJ
通讯作者: Lapidus LJ