期刊
ACS CHEMICAL BIOLOGY
卷 12, 期 4, 页码 1020-1027出版社
AMER CHEMICAL SOC
DOI: 10.1021/acschembio.7b00113
关键词
-
资金
- National Institutes of Health [R01GM114537]
The aggregation of neurodegenerative-disease associated proteins can be affected by many factors, including a variety of post-translational modifications. One such modification, O-GlcNAcylation, has been found on some of these aggregation prone proteins, including alpha-synuclein, the major protein that plays a causative role in synucleinopathies like Parkinson's disease. We previously used synthetic protein chemistry to prepare alpha-synuclein beating a homogeneous O-GlcNAc modification at threonine 72 and showed that this modification inhibits protein aggregation. However, the effects of the other eight O-GlcNAcylation sites that have, been identified were unknown. Here, we use a similar synthetic strategy to investigate the consequences of this modification at one of these sites, serine 87. We show that O-GlcNAcylation at this Site also inhibits alpha-synuclein aggregation but to a lesser extent than that for the same modification at threonine 72. However, we also find that this modification does not affect the membrane-binding properties of alpha-synuclein, which differentiates it from phosphorylation at the same site. These results further support the development of therapies that can elevate O-GlcNAcylation of alpha-synuclein to slow the progression of Parkinson's disease.
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