alpha-Synuclein forms a complex with transcription factor Elk-1.

Abstract:

:alpha-Synuclein has been identified as a component of Lewy bodies in Parkinson's disease and diffuse Lewy body disease, and glial cytoplasmic inclusions (GCIs) in multiple system atrophy (MSA). To explore the role of alpha-synuclein in the pathogenesis, we searched for molecules interacting with alpha-synuclein and discovered that GCIs are stained by anti-Elk-1 antibody. To seek the role of Elk-1 in synucleinopathies, we cotransfected alpha-synuclein and Elk-1 to cultured cells, and found small granular structure complexes where the two molecules colocalized. Moreover, alpha-synuclein and Elk-1 were co-immunoprecipitated from the cell lysates. For formation of the complex, the presence of both ETS and B-box domains of Elk-1 was required. Although there was no evidence of direct binding between alpha-synuclein and Elk-1, we discovered that alpha-synuclein and Elk-1 both bind to ERK-2, a MAP kinase. The effect of alpha-synuclein on the MAP kinase pathway was assessed using the Pathdetect system, which showed prominent attenuation of Elk-1 phosphorylation with alpha-synuclein, and especially A53T mutant. Our results suggest that alpha-synuclein reacts with the MAP kinase pathway, which might cause dysfunction of neurons and oligodendrocytes and lead to neurodegeneration in Parkinson's disease and MSA.

journal_name

J Neurochem

authors

Iwata A,Miura S,Kanazawa I,Sawada M,Nukina N

doi

10.1046/j.1471-4159.2001.t01-1-00232.x

keywords:

subject

Has Abstract

pub_date

2001-04-01 00:00:00

pages

239-52

issue

1

eissn

0022-3042

issn

1471-4159

journal_volume

77

pub_type

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