Heterologous expression in Saccharomyces cerevisiae of an Arabidopsis thaliana cDNA encoding mevalonate diphosphate decarboxylase

Heterologous expression in Saccharomyces cerevisiae of an Arabidopsis thaliana cDNA encoding... Sequence comparison with the mevalonate diphosphate decarboxylase (MVD) amino acid sequence of Saccharomyces cerevisiae identified an EST clone corresponding to a cDNA that may encode Arabidopsis thaliana MVD (AtMVD1). This enzyme catalyses the synthesis of isopentenyl diphosphate, the building block of sterol and isoprenoid biosynthesis, and uses mevalonate diphosphate as a substrate. Sequencing of the full-length cDNA was performed. The predicted amino acid sequence presents about 55% identity with the yeast, human and rat MVDs. The sequence of the genomic region of A. thaliana MVD was also obtained and Southern blot analysis on genomic DNA showed that A. thaliana could have at least one homologous MVD gene. In order to allow heterologous expression in S. cerevisiae, the MVD open reading frame (ORF) was then cloned under the control of the yeast PMA1 strong promoter. When expressed in yeast, the A. thaliana cDNA complemented both the thermosensitive MN19-34 strain deficient in MVD, and the lethal phenotype of an ERG19 deleted strain. However, the wild-type sterol content was not fully restored suggesting that the A. thaliana MVD activity may not be optimal in yeast. A two-hybrid assay was also performed to evaluate homodimer formation of the A. thaliana MVD and heterodimer formation between the plant and yeast heterologous enzymes. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Plant Molecular Biology Springer Journals

Heterologous expression in Saccharomyces cerevisiae of an Arabidopsis thaliana cDNA encoding mevalonate diphosphate decarboxylase

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Publisher
Kluwer Academic Publishers
Copyright
Copyright © 1999 by Kluwer Academic Publishers
Subject
Life Sciences; Biochemistry, general; Plant Sciences; Plant Pathology
ISSN
0167-4412
eISSN
1573-5028
D.O.I.
10.1023/A:1006181720100
Publisher site
See Article on Publisher Site

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