Chemoenzymatic Semi-synthesis Enables Efficient Production of Isotopically Labeled α-Synuclein with Site-Specific Tyrosine Phosphorylation.
Chemoenzymatic Semi-synthesis Enables Efficient Production of Isotopically Labeled α-Synuclein with Site-Specific Tyrosine Phosphorylation.
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DOI:
10.1002/cbic.202000742
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发表时间:
2021-04-16
期刊:
影响因子:
--
通讯作者:
Petersson EJ
中科院分区:
文献类型:
--
作者:
Pan B;Park JH;Ramlall T;Eliezer D;Rhoades E;Petersson EJ
Post-translational modifications (PTMs) can affect the normal function and pathology of α-synuclein (αS), an amyloid fibril forming protein linked to Parkinson’s disease. Phosphorylation of αS Tyr39 has recently been found to display a dose-dependent effect on fibril formation kinetics and to alter the morphology of the fibrils. Existing methods to access site-specifically phosphorylated αS for biochemical studies include total or semi-synthesis by native chemical ligation (NCL) as well as chemoenzymatic methods to phosphorylate peptides, followed by NCL. Here we investigated a streamlined method to produce large quantities of phosphorylated αS by co-expressing a kinase with a protein fragment in E. coli. We also introduced the use of methyl thioglycolate (MTG) to enable one pot NCL and desulfurization. We compare our optimized methods to previous reports and show that we can achieve the highest yields of site-specifically phosphorylated protein through chemoenzymatic methods using MTG, and that our strategy is uniquely well-suited to producing 15N labeled, phosphorylated protein for NMR studies. Several strategies for producing α-synuclein phosphorylated at Tyr39 (αS-pY39) are compared and the value of a chemoenzymatic strategy with one-pot ligation is demonstrated, in particular for producing 15N labeled protein for NMR studies.
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影响因子:
4
作者:
Pan B;Rhoades E;Petersson EJ
通讯作者:
Petersson EJ
影响因子:
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作者:
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Lashuel, Hilal A.
影响因子:
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