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TECPR2 Cooperates with LC3C to Regulate COPII-Dependent ER Export

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2015

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Stadel, Daniela
Huber, Jessica
Tamin-Yecheskel, Bat-Chen
Akutsu, Masato
Demishtein, Alik
Ben-Zeev, Bruria
Behrends, Christian
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Molecular Cell. 2015, 60(1), pp. 89-104. ISSN 1097-2765. eISSN 1097-4164. Available under: doi: 10.1016/j.molcel.2015.09.010

Zusammenfassung

Hereditary spastic paraplegias (HSPs) are a diverse group of neurodegenerative diseases that are characterized by axonopathy of the corticospinal motor neurons. A mutation in the gene encoding for Tectonin β-propeller containing protein 2 (TECPR2) causes HSP that is complicated by neurological symptoms. While TECPR2 is a human ATG8 binding protein and positive regulator of autophagy, the exact function of TECPR2 is unknown. Here, we show that TECPR2 associates with several trafficking components, among them the COPII coat protein SEC24D. TECPR2 is required for stabilization of SEC24D protein levels, maintenance of functional ER exit sites (ERES), and efficient ER export in a manner dependent on binding to lipidated LC3C. TECPR2-deficient HSP patient cells display alterations in SEC24D abundance and ER export efficiency. Additionally, TECPR2 and LC3C are required for autophagosome formation, possibly through maintaining functional ERES. Collectively, these results reveal that TECPR2 functions as molecular scaffold linking early secretion pathway and autophagy.

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570 Biowissenschaften, Biologie

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ISO 690STADEL, Daniela, Valentina MILLARTE, Kerstin D. TILLMANN, Jessica HUBER, Bat-Chen TAMIN-YECHESKEL, Masato AKUTSU, Alik DEMISHTEIN, Bruria BEN-ZEEV, Hesso FARHAN, Christian BEHRENDS, 2015. TECPR2 Cooperates with LC3C to Regulate COPII-Dependent ER Export. In: Molecular Cell. 2015, 60(1), pp. 89-104. ISSN 1097-2765. eISSN 1097-4164. Available under: doi: 10.1016/j.molcel.2015.09.010
BibTex
@article{Stadel2015TECPR-33226,
  year={2015},
  doi={10.1016/j.molcel.2015.09.010},
  title={TECPR2 Cooperates with LC3C to Regulate COPII-Dependent ER Export},
  number={1},
  volume={60},
  issn={1097-2765},
  journal={Molecular Cell},
  pages={89--104},
  author={Stadel, Daniela and Millarte, Valentina and Tillmann, Kerstin D. and Huber, Jessica and Tamin-Yecheskel, Bat-Chen and Akutsu, Masato and Demishtein, Alik and Ben-Zeev, Bruria and Farhan, Hesso and Behrends, Christian}
}
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