title: Rat alpha-synuclein interacts with Tat binding protein 1, a component of the 26S proteasomal complex.
abstract: The alpha-synuclein gene, which encodes a brain presynaptic nerve terminal protein of unknown function, is linked to familial early-onset Parkinson's disease (PD). The finding that alpha-synuclein forms the major fibrillary component of Lewy bodies in brains of PD patients suggests that the two point mutations in alpha-synuclein (Ala(53)Thr, Ala(30)Pro) may promote the aggregation of alpha-synuclein into filaments. To address the role of alpha-synuclein in neurodegenerative diseases, we performed a yeast two-hybrid screen of a rat adult brain cDNA library using rat alpha-synuclein 2 (alphaSYN2). Here we report that alphaSYN2 interacts specifically with Tat binding protein 1, a subunit of the 700-kDa proteasome activator (PA700), the regulatory complex of the 26S proteasome and of the modulator complex, which enhances PA700 activation of the proteasome.
authors.affiliation: Laboratoire de Génétique Moléculaire de la Neurotransmission et des Processus Neurodégénératifs, Centre National de la Recherche Scientifique, UMR9923, Hôpital de la Pitié Sâlpêtrière, Paris, France.
authors.forename: M
authors.initials: M
authors.lastname: Ghee
authors.forename: A
authors.initials: A
authors.lastname: Fournier
authors.forename: J
authors.initials: J
authors.lastname: Mallet
mesh_terms: D000074183:ATPases Associated with Diverse Cellular Activities; D000818:Animals; D001921:Brain / Q000166:cytology / Q000378:metabolism; D002460:Cell Line; D002999:Clone Cells; D004268:DNA-Binding Proteins / Q000378:metabolism*; D004298:Dopamine / Q000378:metabolism; D006801:Humans; D007668:Kidney / Q000166:cytology / Q000378:metabolism; D016631:Lewy Bodies / Q000378:metabolism; D046911:Macromolecular Substances; D009419:Nerve Tissue Proteins / Q000235:genetics / Q000378:metabolism*; D009474:Neurons / Q000166:cytology / Q000378:metabolism; D020734:Parkinsonian Disorders / Q000378:metabolism; D010447:Peptide Hydrolases / Q000378:metabolism*; D011233:Precipitin Tests; D017729:Presynaptic Terminals / Q000378:metabolism; D046988:Proteasome Endopeptidase Complex; D011506:Proteins / Q000378:metabolism; D051381:Rats; D012440:Saccharomyces / Q000235:genetics; D051843:Synucleins; D014162:Transfection; D020798:Two-Hybrid System Techniques; D014446:Tyrosine 3-Monooxygenase / Q000378:metabolism; D051844:alpha-Synuclein
chemical_list: D004268:DNA-Binding Proteins; D046911:Macromolecular Substances; D009419:Nerve Tissue Proteins; C085834:PA700 proteasome activator; D011506:Proteins; C497604:SNCA protein, human; C497606:Snca protein, rat; D051843:Synucleins; D051844:alpha-Synuclein; D014446:Tyrosine 3-Monooxygenase; D010447:Peptide Hydrolases; D046988:Proteasome Endopeptidase Complex; C061553:ATP dependent 26S protease; D000074183:ATPases Associated with Diverse Cellular Activities; C064757:PSMC3 protein, human; D004298:Dopamine