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http://dx.doi.org/10.5352/JLS.2003.13.6.933

Restoration of Saccharomyces cerevisiae coq7 Mutant by a Neurospora crassa Gene  

김은정 (고신대학교 생명과학과)
김상래 (고신대학교 생명과학과)
이병욱 (고신대학교 생명과학과)
Publication Information
Journal of Life Science / v.13, no.6, 2003 , pp. 933-942 More about this Journal
Abstract
CoenzymeQ is a quinone derivative with a long isoprenoid side chain. It transports electrons in the respiratory chain located in the inner mitochondrial membrane of eukaryotes and the plasma membrane of prokaryotes. It also functions as an antioxidant. Saccharomyces cerevisine coq mutants, that are deficient coenzyme Q biosynthesis fail to aerobically grow. They are not able to grow on non-fermentable carbon sources, such as glycerol, either The putative $coq^{-7}$ gene involved in coenzyme Q biosynthesis of Neurospora crassa was cloned and used for complementation of S. cerevisiae coq7 mutant. The predicted amino acid sequence of N. crassa COQ7 showed about 58% homology with Coq7p of S. cerevisiae. The growth rate of S. cerevisiae $coq^7$ mutant transformed with the N. crassa $coq^{-7}$ gene was restored to the wild-type level. The complemented 5. cerevisiae strain was able to grow with glycerol as a sole carbon source and showed less sensitivities to linolenic acid, a polyunsaturated fatty acid.
Keywords
Neurospora crassa; COQ7; coenzyme Q; Ubiquinone; antioxidant; Saccharomyces cerevisiae;
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