Chemoenzymatic Semisynthesis of Phosphorylated α-Synuclein Enables Identification of a Bidirectional Effect on Fibril Formation.
Chemoenzymatic Semisynthesis of Phosphorylated α-Synuclein Enables Identification of a Bidirectional Effect on Fibril Formation.
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DOI:
10.1021/acschembio.9b01038
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发表时间:
2020-03-20
影响因子:
4
通讯作者:
Petersson EJ
中科院分区:
文献类型:
--
作者:
Pan B;Rhoades E;Petersson EJ
Post-translational modifications (PTMs) impact the pathological aggregation of α-synuclein (αS), a hallmark of Parkinson’s Disease (PD). Here, we synthesize αS phosphorylated at tyrosine 39 (pY39) through a novel route using in vitro enzymatic phosphorylation of a fragment followed by ligation to form the full-length protein. We can execute this synthesis in combination with unnatural amino acid mutagenesis to include two fluorescent labels for Förster resonance energy transfer (FRET) studies. We determine the effect of pY39 on the aggregation of αS, and compare our authentically phosphorylated material to the corresponding glutamate 39 “phosphomimetic.” Intriguingly, we find that αS-pY39 can either accelerate or decelerate aggregation, depending on the fraction of phosphorylated protein. The αS-E39 mutant can qualitatively reproduce some, but not all, of these effects. FRET measurements and analysis of existing structures of αS help to provide an explanation for this phenomenon. Our results have important implications for treatment of PD patients with tyrosine kinase inhibitors and highlight the importance of validating phosphomimetics through studies of authentic PTMs.
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影响因子:
15
作者:
Hejjaoui, Mirva;Butterfield, Sara;Fauvet, Bruno;Vercruysse, Filip;Cui, Jia;Dikiy, Igor;Prudent, Michel;Olschewski, Diana;Zhang, Yan;Eliezer, David;Lashuel, Hilal A.
通讯作者:
Lashuel, Hilal A.
影响因子:
56.9
作者:
DAWSON, PE;MUIR, TW;KENT, SBH
通讯作者:
KENT, SBH
影响因子:
16.6
作者:
Tanaka, Tomohiro;Wagner, Anne M.;Warner, John B.;Wang, Yanxin J.;Petersson, E. James
通讯作者:
Petersson, E. James
影响因子:
3.5
作者:
Mahul-Mellier, Anne-Laure;Fauvet, Bruno;Lashuel, Hilal A.
通讯作者:
Lashuel, Hilal A.
影响因子:
21.8
作者:
Marotta NP;Lin YH;Lewis YE;Ambroso MR;Zaro BW;Roth MT;Arnold DB;Langen R;Pratt MR
通讯作者:
Pratt MR