Molecular cloning and expression analysis of a new putative gene encoding 3-hydroxy-3-methylglutaryl-CoA synthase from Salvia miltiorrhiza

Lin Zhang, Xiangming Yan, Jing Wang, Shanshan Li, Pan Liao, Guoyin Kai*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)

Abstract

A new putative gene encoding 3-hydroxy-3-methylglutaryl coenzyme A synthase (designated as SmHMGS, GenBank Accession No. FJ785326), which catalyses the condensation of acetyl-CoA and acetoacetyl-CoA to form 3-hydroxy-3-methylglutaryl-CoA as an early step in the mevalonic acid pathway, was isolated from young leaves of Salvia miltiorrhiza by rapid amplification of cDNA ends (RACE) for the first time. The full-length cDNA of the putative SmHMGS was 1,655 bp containing a 1,381 bp open reading frame (ORF) encoding a polypeptide of 460 amino acids. Comparative and bioinformatic analyses revealed that SmHMGS showed extensive homology with HMGSs from other plant species. Phylogenetic tree analysis indicated that SmHMGS belonged to the plant HMGS super family and had the closest relationship with HMGS from Hevea brasiliensis. Tissue expression pattern analysis revealed that the putative SmHMGS was constitutively expressed in all the tested tissues and strong in leaf, moderate in stem, weak in root, which was in contrast to SmHMGR reported before. The putative SmHMGS was found to be an elicitor-responsive gene, which could be induced by exogenous elicitors, including salicylic acid (SA) and methyl jasmonate (MJ). These results will help in understanding the role of HMGS in tanshinones biosynthesis in S. miltiorrhiza.
Original languageEnglish
Pages (from-to)953-961
Number of pages9
JournalActa Physiologiae Plantarum
Volume33
Issue number3
Early online date28 Oct 2010
DOIs
Publication statusPublished - May 2011

Scopus Subject Areas

  • Physiology
  • Agronomy and Crop Science
  • Plant Science

User-Defined Keywords

  • Expression profile
  • Methyl jasmonate (MJ)
  • Putative SmHMGS
  • Salicylic acid (SA)
  • Salvia miltiorrhiza

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