Main content area

Molecular cloning and functional expression analysis of a new gene encoding geranylgeranyl diphosphate synthase from hazel (Corylus avellana L. Gasaway)

Wang, Yechun, Miao, Zhiqi, Tang, Kexuan
Molecular biology reports 2010 v.37 no.7 pp. 3439-3444
Corylus avellana, Escherichia coli, Southern blotting, biosynthesis, carotenoids, complementary DNA, genes, introns, leaves, methyl jasmonate, molecular cloning, open reading frames, paclitaxel, plasmids, polypeptides, reverse transcriptase polymerase chain reaction
Geranylgeranyl diphosphate synthase (GGPPS) [EC] catalyzes the biosynthesis of geranylgeranyl diphosphate (GGPP), which is a key precursor for diterpenes such as taxol. Herein, a full-length cDNA encoding GGPPS (designated as CgGGPPS) was cloned and characterized from hazel (Corylus avellana L. Gasaway), a taxol-producing angiosperms. The full-length cDNA of CgGGPPS was 1515 bp with a 1122 bp open reading frame (ORF) encoding a 373 amino acid polypeptide. The CgGGPPS genomic DNA sequence was also obtained, revealing CgGGPPS gene was not interrupted by an intron. Southern blot analysis indicated that CgGGPPS belonged to a small gene family. Tissue expression pattern analysis indicated that CgGGPPS expressed the highest in leaves. RT-PCR analysis indicated that CgGGPPS expression could be induced by exogenous methyl jasmonate acid. Furthermore, carotenoid accumulation was observed in Escherichia coli carrying pACCAR25ΔcrtE plasmid carrying CgGGPPS. The result revealed that cDNA encoded a functional GGPP synthase.