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Citation
Okamura, T., Shimizu, H., Nagao, T., Ueda, R., Ishii, S. (2007). ATF-2 regulates fat metabolism in Drosophila.  Mol. Biol. Cell 18(4): 1519--1529.
FlyBase ID
FBrf0201502
Publication Type
Research paper
Abstract

ATF-2 is a member of the ATF/CREB family of transcription factors that is activated by stress-activated protein kinases such as p38. To analyze the physiological role of Drosophila ATF-2 (dATF-2), we generated dATF-2 knockdown flies using RNA interference. Reduced dATF-2 in the fat body, the fly equivalent of the mammalian liver and adipose tissue, decreased survival under starvation conditions. This was due to smaller triglyceride reserves of dATF-2 knockdown flies than control flies. Among multiple genes that control triglyceride levels, expression of the Drosophila PEPCK (dPEPCK) gene was strikingly reduced in dATF-2 knockdown flies. PEPCK is a key enzyme for both gluconeogenesis and glyceroneogenesis, which is a pathway required for triglyceride synthesis via glycerol-3-phosphate. Although the blood sugar level in dATF-2 knockdown flies was almost same as that in control flies, the activity of glyceroneogenesis was reduced in the fat bodies of dATF-2 knockdown flies. Thus, reduced glyceroneogenesis may at least partly contribute to decreased triglyceride stores in the dATF-2 knockdown flies. Furthermore we showed that dATF-2 positively regulated dPEPCK gene transcription via several CRE half-sites in the PEPCK promoter. Thus, dATF-2 is critical for regulation of fat metabolism.

PubMed ID
PubMed Central ID
PMC1838969 (PMC) (EuropePMC)
Associated Information
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Secondary IDs
  • FBrf0195111
Language of Publication
English
Additional Languages of Abstract
Parent Publication
Publication Type
Journal
Abbreviation
Mol. Biol. Cell
Title
Molecular Biology of the Cell
Publication Year
1992-
ISBN/ISSN
1059-1524
Data From Reference
Alleles (7)
Genes (9)
Cell Lines (1)
Natural transposons (1)
Insertions (1)
Experimental Tools (1)
Transgenic Constructs (5)