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Phosphor screen

Company: General Electric
Catalog#: 146931
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In vitro AMPylation/Adenylylation of Alpha-synuclein by HYPE/FICD
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2020-09-20
[Abstract]  One of the major histopathological hallmarks of Parkinson’s disease are Lewy bodies (LBs) –cytoplasmic inclusions, enriched with fibrillar forms of the presynaptic protein alpha-synuclein (α-syn). Progressive deposition of α-syn into LBs is enabled by its propensity to fibrillize into insoluble aggregates. We recently described a marked reduction in α-syn fibrillation in vitro upon posttranslational modification (PTM) by the Fic (Filamentation induced by cAMP) family adenylyltransferase HYPE/FICD (Huntingtin yeast-interacting protein E/FICD). Specifically, HYPE utilizes ATP to covalently decorate key threonine residues in α-syn’s N-terminal and NAC (non-amyloid-β component) regions with AMP (adenosine monophosphate), in a PTM termed AMPylation or adenylylation. Status quo in ... [摘要]  [摘要 ] 帕金森氏病的主要组织病理学标志之一是路易体(LB) –细胞质内含物,富含纤维状形式的突触前蛋白α-突触核蛋白(α-syn)。由于α-syn易于原纤维化成不溶性聚集体,因此可以逐步沉积到LBs中。我们最近描述了Fic(由cAMP诱导的细丝化)家族腺苷酸转移酶HYPE / FICD(与亨廷顿酵母相互作用的蛋白E / FICD)在翻译后修饰(PTM)后体外α-syn纤颤的明显减少。具体而言,HYPE利用ATP在称为AMPylation 或adenylylation 的PTM中,以AMP(单磷酸腺苷)共价修饰α-syn's N末端和NAC(非淀粉样β成分)区域中的关键苏氨酸残基。HYPE底物(例如α-syn)的体外AMPyl化反应现状使用多种ATP类似物,包括放射性标记的α - 32 P-ATP 或α - 33 P-ATP,荧光ATP类似物,生物素化ATP类似物(N6- [6-六甲基] -ATP-生物素),以及基于点击化学的烷基-ATP方法检测基于凝胶的AMPylation 。当前描述HYPE介导AMPylation 的分步方案的文献依赖于α - 33 P-ATP核苷酸,而不是更常见的α - 32 P-ATP。尽管有效,但前一种方法需要长时间且危险的DMSO-PPO(二甲基亚砜- 聚苯基恶唑)沉淀。因此,我们提供了基于α - 33 ...

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