Molecular cloning, characterization and expression analysis of a new gene encoding 3-hydroxy-3-methylglutaryl coenzyme A reductase from Salvia miltiorrhiza

Pan Liao, Wei Zhou, Lin Zhang, Jing Wang, Xiangming Yan, Yan Zhang, Ran Zhang, Li Li, Genyu Zhou, Guoyin Kai*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

75 Citations (Scopus)

Abstract

The 3-hydroxy-3-methylglutaryl-CoA reductase (HMGR) catalyzes the conversion of HMG-CoA to mevalonate (MVA), which is the first committed step in MVA pathway for isoprenoid biosynthesis in plants. In this study, a full-length cDNA encoding HMGR was isolated from Salvia miltiorrhiza by rapid amplification of cDNA ends (RACE) for the first time, which was designated as SmHMGR (GenBank Accession No.EU680958). The full-length cDNA of SmHMGR was 2,115 bp containing a 1,695 bp open reading frame (ORF) encoding a polypeptide of 565 amino acids. Bioinformatic analyzes revealed that the deduced SmHMGR had extensive homology with other plant HMGRs contained two transmembrane domains and a catalytic domain. Molecular modeling showed that SmHMGR is a new HMGR with a spatial structure similar to other plant HMGRs. Phylogenetic tree analysis indicated that SmHMGR belongs to the plant HMGR super-family and has the closest relationship with HMGR from Picrorhiza kurrooa. Expression pattern analysis implied that SmHMGR expressed highest in root, followed by stem and leaf. The expression of SmHMGR could be up-regulated by salicylic acid (SA) and methyl jasmonate (MeJA), suggesting that SmHMGR was elicitor-responsive. This work will be helpful to understand more about the role of HMGR involved in the tanshinones biosynthesis at the molecular level.

Original languageEnglish
Pages (from-to)565-572
Number of pages8
JournalActa Physiologiae Plantarum
Volume31
Issue number3
DOIs
Publication statusPublished - 4 Feb 2009

Scopus Subject Areas

  • Physiology
  • Agronomy and Crop Science
  • Plant Science

User-Defined Keywords

  • Expression analysis
  • Molecular cloning
  • Salvia miltiorrhiza
  • SmHMGR
  • Tanshinones

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