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Mutation in ATG5 reduces autophagy and leads to ataxia with developmental delay.

Myungjin Kim | Erin Sandford | Damian Gatica | Yu Qiu | Xu Liu | Yumei Zheng | Brenda A Schulman | Jishu Xu | Ian Semple | Seung-Hyun Ro | Boyoung Kim | R Nehir Mavioglu | Aslıhan Tolun | Andras Jipa | Szabolcs Takats | Manuela Karpati | Jun Z Li | Zuhal Yapici | Gabor Juhasz | Jun Hee Lee | Daniel J Klionsky | Margit Burmeister
eLife | 2016

Autophagy is required for the homeostasis of cellular material and is proposed to be involved in many aspects of health. Defects in the autophagy pathway have been observed in neurodegenerative disorders; however, no genetically-inherited pathogenic mutations in any of the core autophagy-related (ATG) genes have been reported in human patients to date. We identified a homozygous missense mutation, changing a conserved amino acid, in ATG5 in two siblings with congenital ataxia, mental retardation, and developmental delay. The subjects' cells display a decrease in autophagy flux and defects in conjugation of ATG12 to ATG5. The homologous mutation in yeast demonstrates a 30-50% reduction of induced autophagy. Flies in which Atg5 is substituted with the mutant human ATG5 exhibit severe movement disorder, in contrast to flies expressing the wild-type human protein. Our results demonstrate the critical role of autophagy in preventing neurological diseases and maintaining neuronal health.

Pubmed ID: 26812546

Research resources used in this publication

None found

Antibodies used in this publication

None found

Associated grants

  • Agency: NIH HHS, United States
    Id: R21-OD018265
  • Agency: NINDS NIH HHS, United States
    Id: R01-NS078560
  • Agency: NIGMS NIH HHS, United States
    Id: R01 GM077053
  • Agency: Wellcome Trust, United Kingdom
    Id: 087518
  • Agency: NIGMS NIH HHS, United States
    Id: R01-GM053396
  • Agency: NCI NIH HHS, United States
    Id: P30 CA021765
  • Agency: Wellcome Trust, United Kingdom
  • Agency: NIGMS NIH HHS, United States
    Id: R01-GM077053
  • Agency: Wellcome Trust, United Kingdom
    Id: 087518/Z/08/Z
  • Agency: NIGMS NIH HHS, United States
    Id: R01 GM053396
  • Agency: NINDS NIH HHS, United States
    Id: R01 NS078560
  • Agency: NIH HHS, United States
    Id: R21 OD018265

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