Drosophila sbo regulates lifespan through its function in the synthesis of coenzyme Q in vivo

Jiyong Liu; Qinghua Wu; Dianlu He; Tengyu Ma; Li Du; Wen Dui; Xiaoyan Guo; Renjie Jiao

doi:10.1016/j.jgg.2011.05.002

Volume 38 Issue 6

Jun. 2011

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Article Navigation > Journal of Genetics and Genomics > 2011 > 38(6): 225-234

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Drosophila sbo regulates lifespan through its function in the synthesis of coenzyme Q in vivo

doi: 10.1016/j.jgg.2011.05.002

Jiyong Liu^{a, b},
Qinghua Wu^{a, b},
Dianlu He^a,
Tengyu Ma^a,
Li Du^a,
Wen Dui^{a, b},
Xiaoyan Guo^{a, c},
Renjie Jiao^a

a
State Key Laboratory of Brain and Cognitive Sciences, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China
b
Graduate School of the Chinese Academy of Sciences, Beijing 100080, China
c
Department of Biology, Texas A&M University, College Station, TX 77843, USA

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Corresponding author: E-mail address: rjiao@sun5.ibp.ac.cn (Renjie Jiao)
Received Date: 2011-04-18
Accepted Date: 2011-05-03
Rev Recd Date: 2011-05-01

Available Online: 2011-05-14

Publish Date: 2011-06-20

Abstract

Abstract

CoQ is an essential electron carrier in the mitochondrial respiratory chain of both eukaryotes and prokaryotes. It consists of a benzoquinone head group and a hydrophobic polyisoprenoid tail. The genes (COQ1–9) involved in CoQ biosynthesis have been characterized in yeast. In this study, we generated and molecularly characterized a mutant allele of a novel Drosophila gene, sbo, which encodes a protein that is predicted to catalyze the prenylation of p-hydroxybenzoate with the isoprenoid chain during the process of CoQ synthesis. Expression of sbo in yeast rescues the lethality of ∆COQ2 mutant cells, indicating that sbo is a functional homolog of COQ2. HPLC results show that the levels of CoQ₉ and CoQ₁₀ were significantly reduced in sbo heterozygous adult flies. Furthermore, the mean lifespans of males and females heterozygous for sbo are extended by 12.5% and 30.8%, respectively. Homozygous sbo animals exhibit reduced activities of the insulin/insulin-like growth factor signaling (IIS) pathway. Taken together, we conclude that sbo is an essential gene for Drosophila development, mutation of which leads to an extension of lifespan most likely by altering endogenous CoQ biosynthesis.
- Coenzyme Q,
- Lifespan,
- Insulin signaling

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References(50)

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