Mutation in archain 1, a subunit of COPI coatomer complex, causes diluted coat color and Purkinje cell degeneration.

Xinjie Xu, Rajendra Kedlaya, Hitoshi Higuchi, Sakae Ikeda, Monica J. Justice, Vijayasaradhi Setaluri, Akihiro Ikeda

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

Intracellular trafficking is critical for delivering molecules and organelles to their proper destinations to carry out normal cellular functions. Disruption of intracellular trafficking has been implicated in the pathogenesis of various neurodegenerative disorders. In addition, a number of genes involved in vesicle/organelle trafficking are also essential for pigmentation, and loss of those genes is often associated with mouse coat-color dilution and human hypopigmentary disorders. Hence, we postulated that screening for mouse mutants with both neurological defects and coat-color dilution will help identify additional factors associated with intracellular trafficking in neuronal cells. In this study, we characterized a mouse mutant with a unique N-ethyl-N-nitrosourea (ENU)-induced mutation, named nur17. nur17 mutant mice exhibit both coat-color dilution and ataxia due to Purkinje cell degeneration in the cerebellum. By positional cloning, we identified that the nur17 mouse carries a T-to-C missense mutation in archain 1 (Arcn1) gene which encodes the delta subunit of the coat protein I (COPI) complex required for intracellular trafficking. Consistent with this function, we found that intracellular trafficking is disrupted in nur17 melanocytes. Moreover, the nur17 mutation leads to common characteristics of neurodegenerative disorders such as abnormal protein accumulation, ER stress, and neurofibrillary tangles. Our study documents for the first time the physiological consequences of the impairment of the ARCN1 function in the whole animal and demonstrates a direct association between ARCN1 and neurodegeneration.

Original languageEnglish
JournalPLoS Genetics
Volume6
Issue number5
DOIs
Publication statusPublished - 2010
Externally publishedYes

Fingerprint

Coatomer Protein
Coat Protein Complex I
trafficking
Purkinje Cells
coat proteins
mutation
Color
Mutation
protein
color
mice
neurodegenerative diseases
dilution
Neurodegenerative Diseases
Organelles
mutants
organelles
cells
N-ethyl-N-nitrosourea
gene

ASJC Scopus subject areas

  • Genetics
  • Molecular Biology
  • Ecology, Evolution, Behavior and Systematics
  • Cancer Research
  • Genetics(clinical)

Cite this

Mutation in archain 1, a subunit of COPI coatomer complex, causes diluted coat color and Purkinje cell degeneration. / Xu, Xinjie; Kedlaya, Rajendra; Higuchi, Hitoshi; Ikeda, Sakae; Justice, Monica J.; Setaluri, Vijayasaradhi; Ikeda, Akihiro.

In: PLoS Genetics, Vol. 6, No. 5, 2010.

Research output: Contribution to journalArticle

Xu, Xinjie ; Kedlaya, Rajendra ; Higuchi, Hitoshi ; Ikeda, Sakae ; Justice, Monica J. ; Setaluri, Vijayasaradhi ; Ikeda, Akihiro. / Mutation in archain 1, a subunit of COPI coatomer complex, causes diluted coat color and Purkinje cell degeneration. In: PLoS Genetics. 2010 ; Vol. 6, No. 5.
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