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PMID:20010805

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Citation

Mauvezin, C, Orpinell, M, Francis, VA, Mansilla, F, Duran, J, Ribas, V, Palacín, M, Boya, P, Teleman, AA and Zorzano, A (2010) The nuclear cofactor DOR regulates autophagy in mammalian and Drosophila cells. EMBO Rep. 11:37-44

Abstract

The regulation of autophagy in metazoans is only partly understood, and there is a need to identify the proteins that control this process. The diabetes- and obesity-regulated gene (DOR), a recently reported nuclear cofactor of thyroid hormone receptors, is expressed abundantly in metabolically active tissues such as muscle. Here, we show that DOR shuttles between the nucleus and the cytoplasm, depending on cellular stress conditions, and re-localizes to autophagosomes on autophagy activation. We demonstrate that DOR interacts physically with autophagic proteins Golgi-associated ATPase enhancer of 16 kDa (GATE16) and microtubule-associated protein 1A/1B-light chain 3. Gain-of-function and loss-of-function studies indicate that DOR stimulates autophagosome formation and accelerates the degradation of stable proteins. CG11347, the DOR Drosophila homologue, has been predicted to interact with the Drosophila Atg8 homologues, which suggests functional conservation in autophagy. Flies lacking CG11347 show reduced autophagy in the fat body during pupal development. All together, our data indicate that DOR regulates autophagosome formation and protein degradation in mammalian and Drosophila cells.

Links

PubMed PMC2816618 Online version:10.1038/embor.2009.242

Keywords

Animals; Autophagy/genetics; Autophagy/physiology; Cell Line; Cell Nucleus/metabolism; Cytoplasm/metabolism; Diabetes Mellitus; Drosophila/anatomy & histology; Drosophila/genetics; Drosophila/growth & development; Drosophila/metabolism; Drosophila Proteins/genetics; Drosophila Proteins/metabolism; Fat Body/metabolism; Fluorescent Antibody Technique; HeLa Cells; Humans; Microfilament Proteins/metabolism; Microscopy, Electron, Transmission; Microscopy, Fluorescence; Microtubule-Associated Proteins/metabolism; Nuclear Proteins/genetics; Nuclear Proteins/metabolism; Obesity; Phagosomes/metabolism; Protein Binding; Protein Transport; Receptors, Thyroid Hormone/metabolism; Stress, Physiological

Significance

Annotations

Gene product Qualifier GO Term Evidence Code with/from Aspect Extension Notes Status

DROME:A8JNK7

involved_in

GO:0010506: regulation of autophagy

ECO:0000315: mutant phenotype evidence used in manual assertion

P

Seeded From UniProt

complete

DROME:M9NFM7

involved_in

GO:0010506: regulation of autophagy

ECO:0000315: mutant phenotype evidence used in manual assertion

P

Seeded From UniProt

complete

DROME:Q8IRB4

involved_in

GO:0010506: regulation of autophagy

ECO:0000315: mutant phenotype evidence used in manual assertion

P

Seeded From UniProt

complete

DROME:Q9VZC7

involved_in

GO:0010506: regulation of autophagy

ECO:0000315: mutant phenotype evidence used in manual assertion

P

Seeded From UniProt

complete


See also

References

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