Phosphorylation at S87 is enhanced in synucleinopathies, inhibits α-synuclein oligomerization, and influences synuclein-membrane interactions

K Paleologou, A Oueslati, G Shakked, C Rospigliosi, H Kim, G Lamberto, C Fernandez, A Schmid, Fariba Chegini, Weiping Gai, D Chiappe, M Moniatte, B Schneider, P Aebischer, D Eliezer, M Zweckstetter, E Masliah, H Lashuel

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    Abstract

    Increasing evidence suggests that phosphorylation may play an important role in the oligomerization, fibrillogenesis, Lewy body (LB) formation, and neurotoxicity of α-synuclein (α-syn) in Parkinson disease. Herein we demonstrate that α-syn is phosphorylated at S87 in vivo and within LBs. The levels of S87-P are increased in brains of transgenic (TG) models of synucleinopathies and human brains from Alzheimer disease (AD), LB disease (LBD), and multiple system atrophy (MSA) patients. Using antibodies against phosphorylated α-syn (S129-P and S87-P), a significant amount of immunoreactivity was detected in the membrane in the LBD, MSA, and AD cases but not in normalcontrols. In brainhomogenatesfromdiseasedhumanbrainsandTGanimals, the majority ofS87-P α-synwasdetected in themembrane fractions.Abattery of biophysical methods were used to dissect the effect of S87 phosphorylation on the structure, aggregation, andmembranebinding properties of monomeric α-syn. These studies demonstrated that phosphorylation at S87 expands the structure of α-syn, increases its conformational flexibility, and blocks its fibrillization in vitro. Furthermore, phosphorylation at S87, but not S129, results in significant reduction of α-syn binding to membranes. Together, our findings provide novel mechanistic insight into the role of phosphorylation at S87 and S129 in the pathogenesis of synucleinopathies and potential roles of phosphorylation in α-syn normal biology.

    Original languageEnglish
    Pages (from-to)3184-3198
    Number of pages15
    JournalJournal of Neuroscience
    Volume30
    Issue number9
    DOIs
    Publication statusPublished - 3 Mar 2010

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  • Cite this

    Paleologou, K., Oueslati, A., Shakked, G., Rospigliosi, C., Kim, H., Lamberto, G., Fernandez, C., Schmid, A., Chegini, F., Gai, W., Chiappe, D., Moniatte, M., Schneider, B., Aebischer, P., Eliezer, D., Zweckstetter, M., Masliah, E., & Lashuel, H. (2010). Phosphorylation at S87 is enhanced in synucleinopathies, inhibits α-synuclein oligomerization, and influences synuclein-membrane interactions. Journal of Neuroscience, 30(9), 3184-3198. https://doi.org/10.1523/JNEUROSCI.5922-09.2010