The effects of oxidative stress on parkin and other E3 ligases
Identifieur interne : 002635 ( Main/Exploration ); précédent : 002634; suivant : 002636The effects of oxidative stress on parkin and other E3 ligases
Auteurs : Matthew J. Lavoie [États-Unis] ; Giuseppe P. Cortese [États-Unis] ; Beth L. Ostaszewski [États-Unis] ; Michael G. Schlossmacher [Canada]Source :
- Journal of neurochemistry [ 0022-3042 ] ; 2007.
Descripteurs français
- Pascal (Inist)
English descriptors
- KwdEn :
Abstract
Autosomal recessive mutations within the Parkin gene are associated with degeneration of the substantia nigra and locus coeruleus and an inherited form of Parkinson's disease (PD). As loss-of-function mutations in parkin are responsible for a familial variant of PD, conditions that affect wild-type parkin are likely to be associated with increased risk of idiopathic disease. Previous studies uncovered a unique vulnerability of the parkin protein to dopamine (DA)-induced aggregation and inactivation. In this study, we compared several proteins that share structural elements or ubiquitinating activity with parkin. We report that oxidative stress in several cell lines and primary neurons induces the aggregation of parkin into high molecular weight species, at least a portion of which are self-associated homo-multimers. While parkin was preferentially affected by excess DA, each of the E3 proteins tested were made more insoluble by oxidative stress, and they varied in degree of susceptibility (e.g. parkin > HHARI ≅ CHIP > c-Cbl > E6AP). These conditions of oxidative stress were also associated with decreased parkin E3 ligase activity. Similar to recently conducted studies on α-synuclein processing, both macroautophagy and the proteasome participate in parkin degradation, with the proteasome playing the predominant role for normal parkin turnover and macroautophagy being more important in the degradation of aggregated parkin. These data further highlight the selective vulnerability of parkin to DA-induced modifications, demonstrating for the first time the ability of both endogenous and ectopically expressed parkin to transition into an insoluble state in part through self-association and oligomer formation.
Affiliations:
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Lavoie</name><affiliation wicri:level="2"><inist:fA14 i1="01"><s1>Center for Neurologic Diseases, Department of Neurology, Brigham and Women's Hospital</s1><s2>Boston, Massachusetts</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Massachusetts</region></placeName></affiliation><affiliation wicri:level="2"><inist:fA14 i1="02"><s1>Harvard Medical School</s1><s2>Boston, Massachusetts</s2><s3>USA</s3><sZ>1 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Massachusetts</region></placeName></affiliation></author><author><name sortKey="Cortese, Giuseppe P" sort="Cortese, Giuseppe P" uniqKey="Cortese G" first="Giuseppe P." last="Cortese">Giuseppe P. 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Lavoie</name><affiliation wicri:level="2"><inist:fA14 i1="01"><s1>Center for Neurologic Diseases, Department of Neurology, Brigham and Women's Hospital</s1><s2>Boston, Massachusetts</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Massachusetts</region></placeName></affiliation><affiliation wicri:level="2"><inist:fA14 i1="02"><s1>Harvard Medical School</s1><s2>Boston, Massachusetts</s2><s3>USA</s3><sZ>1 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Massachusetts</region></placeName></affiliation></author><author><name sortKey="Cortese, Giuseppe P" sort="Cortese, Giuseppe P" uniqKey="Cortese G" first="Giuseppe P." last="Cortese">Giuseppe P. Cortese</name><affiliation wicri:level="2"><inist:fA14 i1="01"><s1>Center for Neurologic Diseases, Department of Neurology, Brigham and Women's Hospital</s1><s2>Boston, Massachusetts</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Massachusetts</region></placeName></affiliation></author><author><name sortKey="Ostaszewski, Beth L" sort="Ostaszewski, Beth L" uniqKey="Ostaszewski B" first="Beth L." last="Ostaszewski">Beth L. Ostaszewski</name><affiliation wicri:level="2"><inist:fA14 i1="01"><s1>Center for Neurologic Diseases, Department of Neurology, Brigham and Women's Hospital</s1><s2>Boston, Massachusetts</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Massachusetts</region></placeName></affiliation></author><author><name sortKey="Schlossmacher, Michael G" sort="Schlossmacher, Michael G" uniqKey="Schlossmacher M" first="Michael G." last="Schlossmacher">Michael G. Schlossmacher</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Ottawa Health Research Institute, University of Ottawa</s1><s2>Ottawa, Ontario</s2><s3>CAN</s3><sZ>4 aut.</sZ></inist:fA14><country>Canada</country><wicri:noRegion>Ottawa, Ontario</wicri:noRegion></affiliation></author></analytic><series><title level="j" type="main">Journal of neurochemistry</title><title level="j" type="abbreviated">J. neurochem.</title><idno type="ISSN">0022-3042</idno><imprint><date when="2007">2007</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Journal of neurochemistry</title><title level="j" type="abbreviated">J. neurochem.</title><idno type="ISSN">0022-3042</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Aggregation</term><term>Cell line</term><term>Degeneration</term><term>Dopamine</term><term>Gene</term><term>Genetic disease</term><term>Inactivation</term><term>Locus coeruleus</term><term>Locus niger</term><term>Mutation</term><term>Oxidative stress</term><term>Parkinson disease</term><term>Protein</term><term>Vulnerability</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Stress oxydatif</term><term>Mutation</term><term>Gène</term><term>Dégénérescence</term><term>Locus niger</term><term>Locus coeruleus</term><term>Vulnérabilité</term><term>Protéine</term><term>Maladie héréditaire</term><term>Dopamine</term><term>Agrégation</term><term>Maladie de Parkinson</term><term>Inactivation</term><term>Lignée cellulaire</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Autosomal recessive mutations within the Parkin gene are associated with degeneration of the substantia nigra and locus coeruleus and an inherited form of Parkinson's disease (PD). As loss-of-function mutations in parkin are responsible for a familial variant of PD, conditions that affect wild-type parkin are likely to be associated with increased risk of idiopathic disease. Previous studies uncovered a unique vulnerability of the parkin protein to dopamine (DA)-induced aggregation and inactivation. In this study, we compared several proteins that share structural elements or ubiquitinating activity with parkin. We report that oxidative stress in several cell lines and primary neurons induces the aggregation of parkin into high molecular weight species, at least a portion of which are self-associated homo-multimers. While parkin was preferentially affected by excess DA, each of the E3 proteins tested were made more insoluble by oxidative stress, and they varied in degree of susceptibility (e.g. parkin > HHARI ≅ CHIP > c-Cbl > E6AP). These conditions of oxidative stress were also associated with decreased parkin E3 ligase activity. Similar to recently conducted studies on α-synuclein processing, both macroautophagy and the proteasome participate in parkin degradation, with the proteasome playing the predominant role for normal parkin turnover and macroautophagy being more important in the degradation of aggregated parkin. These data further highlight the selective vulnerability of parkin to DA-induced modifications, demonstrating for the first time the ability of both endogenous and ectopically expressed parkin to transition into an insoluble state in part through self-association and oligomer formation.</div></front></TEI><affiliations><list><country><li>Canada</li><li>États-Unis</li></country><region><li>Massachusetts</li></region></list><tree><country name="États-Unis"><region name="Massachusetts"><name sortKey="Lavoie, Matthew J" sort="Lavoie, Matthew J" uniqKey="Lavoie M" first="Matthew J." last="Lavoie">Matthew J. Lavoie</name></region><name sortKey="Cortese, Giuseppe P" sort="Cortese, Giuseppe P" uniqKey="Cortese G" first="Giuseppe P." last="Cortese">Giuseppe P. Cortese</name><name sortKey="Lavoie, Matthew J" sort="Lavoie, Matthew J" uniqKey="Lavoie M" first="Matthew J." last="Lavoie">Matthew J. Lavoie</name><name sortKey="Ostaszewski, Beth L" sort="Ostaszewski, Beth L" uniqKey="Ostaszewski B" first="Beth L." last="Ostaszewski">Beth L. Ostaszewski</name></country><country name="Canada"><noRegion><name sortKey="Schlossmacher, Michael G" sort="Schlossmacher, Michael G" uniqKey="Schlossmacher M" first="Michael G." last="Schlossmacher">Michael G. Schlossmacher</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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