Based on the transcriptome database previously detected, we cloned the fulllength cDNA sequence of mevalonate diphosphate decarboxylase gene(MVD) using RTPCR technique from the tea plant of Fuding Dabaicha cultivar. The fulllength cDNA was named CsMVD GenBank accession number MF772780. CsMVD is 1 585 bp in length, containing a 1 266 bp ORF encoding 421 amino acid. The predict protein molecular and theoretic isoelectric point of CsMVD are 46.45 kD and 7.10, respectively. CsMVD protein contains an conserved domain of MVD1 superfamily which is primarily located in the cytoplasm. There are multiple phosphorylation sites at CsMVD protein but with no transmembrane structure and signal peptide. Some conservative amino acid residues determine the specific catalytic and activity of the protein. Phylogenetic tree analysis showed that CsMVD had the closest genetic relationship with Arnebia euchroma MVD. Tissue expression analysis showed that CsMVD expressed among five tested tissues and had the highest level in fruits successively followed by stem, root, leaf and flower. The expression of CsMVD was significantly higher than that of 0 h at the end of 48 h in the withering procedure of White tea. These results demonstrated that CsMVD might be correlated to the formation of tea terpene aroma compounds.
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WANG Pengjie, CHEN Dan, CAO Hongli, CHEN Jing, CHEN Di, YE Naixing. Cloning and Expression of Mevalonate Diphosphate Decarboxylase Gene CsMVD in Tea Plant (Camellia sinensis)[J]. Acta Botanica Boreali-Occidentalia Sinica,2017,37(12):2342-2349