Effects of Serine 129 Phosphorylation on α-Synuclein Aggregation, Membrane Association, and Internalization.
Identifieur interne : 000272 ( PubMed/Checkpoint ); précédent : 000271; suivant : 000273Effects of Serine 129 Phosphorylation on α-Synuclein Aggregation, Membrane Association, and Internalization.
Auteurs : Filsy Samuel [Canada] ; William P. Flavin ; Sobia Iqbal [Canada] ; Consiglia Pacelli ; Sri Dushyaanthan Sri Renganathan [Canada] ; Louis-Eric Trudeau ; Edward M. Campbell [États-Unis] ; Paul E. Fraser [Canada] ; Anurag Tandon [Canada]Source :
- The Journal of biological chemistry [ 1083-351X ] ; 2016.
English descriptors
- KwdEn :
- Amino Acid Substitution, Animals, Animals, Newborn, Cell Line, Cells, Cultured, Dopaminergic Neurons (cytology), Dopaminergic Neurons (metabolism), Dopaminergic Neurons (pathology), Endocytosis, Humans, Mesencephalon (cytology), Mesencephalon (metabolism), Mesencephalon (pathology), Mice, Mutation, Parkinson Disease (genetics), Parkinson Disease (metabolism), Parkinson Disease (pathology), Phosphorylation, Protein Aggregation, Pathological (genetics), Protein Aggregation, Pathological (metabolism), Protein Aggregation, Pathological (pathology), Protein Folding, Protein Processing, Post-Translational, Protein-Serine-Threonine Kinases (genetics), Protein-Serine-Threonine Kinases (metabolism), Recombinant Fusion Proteins (genetics), Recombinant Fusion Proteins (metabolism), Recombinant Proteins (chemistry), Recombinant Proteins (genetics), Recombinant Proteins (metabolism), Serine (metabolism), Synaptosomes (metabolism), Synaptosomes (pathology), alpha-Synuclein (chemistry), alpha-Synuclein (genetics), alpha-Synuclein (metabolism).
- MESH :
- chemical , chemistry : Recombinant Proteins, alpha-Synuclein.
- chemical , genetics : Protein-Serine-Threonine Kinases, Recombinant Fusion Proteins, Recombinant Proteins, alpha-Synuclein.
- cytology : Dopaminergic Neurons, Mesencephalon.
- genetics : Parkinson Disease, Protein Aggregation, Pathological.
- metabolism : Dopaminergic Neurons, Mesencephalon, Parkinson Disease, Protein Aggregation, Pathological, Protein-Serine-Threonine Kinases, Recombinant Fusion Proteins, Recombinant Proteins, Serine, Synaptosomes, alpha-Synuclein.
- pathology : Dopaminergic Neurons, Mesencephalon, Parkinson Disease, Protein Aggregation, Pathological, Synaptosomes.
- Amino Acid Substitution, Animals, Animals, Newborn, Cell Line, Cells, Cultured, Endocytosis, Humans, Mice, Mutation, Phosphorylation, Protein Folding, Protein Processing, Post-Translational.
Abstract
Although trace levels of phosphorylated α-synuclein (α-syn) are detectable in normal brains, nearly all α-syn accumulated within Lewy bodies in Parkinson disease brains is phosphorylated on serine 129 (Ser-129). The role of the phosphoserine residue and its effects on α-syn structure, function, and intracellular accumulation are poorly understood. Here, co-expression of α-syn and polo-like kinase 2 (PLK2), a kinase that targets Ser-129, was used to generate phosphorylated α-syn for biophysical and biological characterization. Misfolding and fibril formation of phosphorylated α-syn isoforms were detected earlier, although the fibrils remained phosphatase- and protease-sensitive. Membrane binding of α-syn monomers was differentially affected by phosphorylation depending on the Parkinson disease-linked mutation. WT α-syn binding to presynaptic membranes was not affected by phosphorylation, whereas A30P α-syn binding was greatly increased, and A53T α-syn was slightly lower, implicating distal effects of the carboxyl- on amino-terminal membrane binding. Endocytic vesicle-mediated internalization of pre-formed fibrils into non-neuronal cells and dopaminergic neurons matched the efficacy of α-syn membrane binding. Finally, the disruption of internalized vesicle membranes was enhanced by the phosphorylated α-syn isoforms, a potential means for misfolded extracellular or lumenal α-syn to access cytosolic α-syn. Our results suggest that the threshold for vesicle permeabilization is evident even at low levels of α-syn internalization and are relevant to therapeutic strategies to reduce intercellular propagation of α-syn misfolding.
DOI: 10.1074/jbc.M115.705095
PubMed: 26719332
Affiliations:
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pubmed:26719332Le document en format XML
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Amino Acid Substitution</term>
<term>Animals</term>
<term>Animals, Newborn</term>
<term>Cell Line</term>
<term>Cells, Cultured</term>
<term>Dopaminergic Neurons (cytology)</term>
<term>Dopaminergic Neurons (metabolism)</term>
<term>Dopaminergic Neurons (pathology)</term>
<term>Endocytosis</term>
<term>Humans</term>
<term>Mesencephalon (cytology)</term>
<term>Mesencephalon (metabolism)</term>
<term>Mesencephalon (pathology)</term>
<term>Mice</term>
<term>Mutation</term>
<term>Parkinson Disease (genetics)</term>
<term>Parkinson Disease (metabolism)</term>
<term>Parkinson Disease (pathology)</term>
<term>Phosphorylation</term>
<term>Protein Aggregation, Pathological (genetics)</term>
<term>Protein Aggregation, Pathological (metabolism)</term>
<term>Protein Aggregation, Pathological (pathology)</term>
<term>Protein Folding</term>
<term>Protein Processing, Post-Translational</term>
<term>Protein-Serine-Threonine Kinases (genetics)</term>
<term>Protein-Serine-Threonine Kinases (metabolism)</term>
<term>Recombinant Fusion Proteins (genetics)</term>
<term>Recombinant Fusion Proteins (metabolism)</term>
<term>Recombinant Proteins (chemistry)</term>
<term>Recombinant Proteins (genetics)</term>
<term>Recombinant Proteins (metabolism)</term>
<term>Serine (metabolism)</term>
<term>Synaptosomes (metabolism)</term>
<term>Synaptosomes (pathology)</term>
<term>alpha-Synuclein (chemistry)</term>
<term>alpha-Synuclein (genetics)</term>
<term>alpha-Synuclein (metabolism)</term>
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<term>alpha-Synuclein</term>
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<term>Recombinant Fusion Proteins</term>
<term>Recombinant Proteins</term>
<term>alpha-Synuclein</term>
</keywords>
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<term>Mesencephalon</term>
</keywords>
<keywords scheme="MESH" qualifier="genetics" xml:lang="en"><term>Parkinson Disease</term>
<term>Protein Aggregation, Pathological</term>
</keywords>
<keywords scheme="MESH" qualifier="metabolism" xml:lang="en"><term>Dopaminergic Neurons</term>
<term>Mesencephalon</term>
<term>Parkinson Disease</term>
<term>Protein Aggregation, Pathological</term>
<term>Protein-Serine-Threonine Kinases</term>
<term>Recombinant Fusion Proteins</term>
<term>Recombinant Proteins</term>
<term>Serine</term>
<term>Synaptosomes</term>
<term>alpha-Synuclein</term>
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<term>Mesencephalon</term>
<term>Parkinson Disease</term>
<term>Protein Aggregation, Pathological</term>
<term>Synaptosomes</term>
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<term>Animals, Newborn</term>
<term>Cell Line</term>
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<front><div type="abstract" xml:lang="en">Although trace levels of phosphorylated α-synuclein (α-syn) are detectable in normal brains, nearly all α-syn accumulated within Lewy bodies in Parkinson disease brains is phosphorylated on serine 129 (Ser-129). The role of the phosphoserine residue and its effects on α-syn structure, function, and intracellular accumulation are poorly understood. Here, co-expression of α-syn and polo-like kinase 2 (PLK2), a kinase that targets Ser-129, was used to generate phosphorylated α-syn for biophysical and biological characterization. Misfolding and fibril formation of phosphorylated α-syn isoforms were detected earlier, although the fibrils remained phosphatase- and protease-sensitive. Membrane binding of α-syn monomers was differentially affected by phosphorylation depending on the Parkinson disease-linked mutation. WT α-syn binding to presynaptic membranes was not affected by phosphorylation, whereas A30P α-syn binding was greatly increased, and A53T α-syn was slightly lower, implicating distal effects of the carboxyl- on amino-terminal membrane binding. Endocytic vesicle-mediated internalization of pre-formed fibrils into non-neuronal cells and dopaminergic neurons matched the efficacy of α-syn membrane binding. Finally, the disruption of internalized vesicle membranes was enhanced by the phosphorylated α-syn isoforms, a potential means for misfolded extracellular or lumenal α-syn to access cytosolic α-syn. Our results suggest that the threshold for vesicle permeabilization is evident even at low levels of α-syn internalization and are relevant to therapeutic strategies to reduce intercellular propagation of α-syn misfolding.</div>
</front>
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<pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">26719332</PMID>
<DateCreated><Year>2016</Year>
<Month>02</Month>
<Day>27</Day>
</DateCreated>
<DateCompleted><Year>2016</Year>
<Month>08</Month>
<Day>01</Day>
</DateCompleted>
<DateRevised><Year>2017</Year>
<Month>02</Month>
<Day>26</Day>
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<JournalIssue CitedMedium="Internet"><Volume>291</Volume>
<Issue>9</Issue>
<PubDate><Year>2016</Year>
<Month>Feb</Month>
<Day>26</Day>
</PubDate>
</JournalIssue>
<Title>The Journal of biological chemistry</Title>
<ISOAbbreviation>J. Biol. Chem.</ISOAbbreviation>
</Journal>
<ArticleTitle>Effects of Serine 129 Phosphorylation on α-Synuclein Aggregation, Membrane Association, and Internalization.</ArticleTitle>
<Pagination><MedlinePgn>4374-85</MedlinePgn>
</Pagination>
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<Abstract><AbstractText>Although trace levels of phosphorylated α-synuclein (α-syn) are detectable in normal brains, nearly all α-syn accumulated within Lewy bodies in Parkinson disease brains is phosphorylated on serine 129 (Ser-129). The role of the phosphoserine residue and its effects on α-syn structure, function, and intracellular accumulation are poorly understood. Here, co-expression of α-syn and polo-like kinase 2 (PLK2), a kinase that targets Ser-129, was used to generate phosphorylated α-syn for biophysical and biological characterization. Misfolding and fibril formation of phosphorylated α-syn isoforms were detected earlier, although the fibrils remained phosphatase- and protease-sensitive. Membrane binding of α-syn monomers was differentially affected by phosphorylation depending on the Parkinson disease-linked mutation. WT α-syn binding to presynaptic membranes was not affected by phosphorylation, whereas A30P α-syn binding was greatly increased, and A53T α-syn was slightly lower, implicating distal effects of the carboxyl- on amino-terminal membrane binding. Endocytic vesicle-mediated internalization of pre-formed fibrils into non-neuronal cells and dopaminergic neurons matched the efficacy of α-syn membrane binding. Finally, the disruption of internalized vesicle membranes was enhanced by the phosphorylated α-syn isoforms, a potential means for misfolded extracellular or lumenal α-syn to access cytosolic α-syn. Our results suggest that the threshold for vesicle permeabilization is evident even at low levels of α-syn internalization and are relevant to therapeutic strategies to reduce intercellular propagation of α-syn misfolding.</AbstractText>
<CopyrightInformation>© 2016 by The American Society for Biochemistry and Molecular Biology, Inc.</CopyrightInformation>
</Abstract>
<AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Samuel</LastName>
<ForeName>Filsy</ForeName>
<Initials>F</Initials>
<AffiliationInfo><Affiliation>From the Tanz Centre for Research in Neurodegenerative Diseases, University of Toronto, Toronto, Ontario M5T 2S8, Canada.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y"><LastName>Flavin</LastName>
<ForeName>William P</ForeName>
<Initials>WP</Initials>
<AffiliationInfo><Affiliation>the Integrative Cell Biology Program.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y"><LastName>Iqbal</LastName>
<ForeName>Sobia</ForeName>
<Initials>S</Initials>
<AffiliationInfo><Affiliation>From the Tanz Centre for Research in Neurodegenerative Diseases, University of Toronto, Toronto, Ontario M5T 2S8, Canada.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y"><LastName>Pacelli</LastName>
<ForeName>Consiglia</ForeName>
<Initials>C</Initials>
<AffiliationInfo><Affiliation>the Departments of Pharmacology and Neurosciences, Central Nervous System Research Group (GRSNC), Faculty of Medicine, Université de Montréal, Québec H4T 1J4, Canada, and.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y"><LastName>Sri Renganathan</LastName>
<ForeName>Sri Dushyaanthan</ForeName>
<Initials>SD</Initials>
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</AffiliationInfo>
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<Author ValidYN="Y"><LastName>Trudeau</LastName>
<ForeName>Louis-Eric</ForeName>
<Initials>LE</Initials>
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</AffiliationInfo>
</Author>
<Author ValidYN="Y"><LastName>Campbell</LastName>
<ForeName>Edward M</ForeName>
<Initials>EM</Initials>
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</AffiliationInfo>
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</country>
<country name="États-Unis"><region name="Illinois"><name sortKey="Campbell, Edward M" sort="Campbell, Edward M" uniqKey="Campbell E" first="Edward M" last="Campbell">Edward M. Campbell</name>
</region>
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</tree>
</affiliations>
</record>
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