Isolation and characterization of a copalyl diphosphate synthase gene promoter from Salvia miltiorrhiza release_fjapmzsqizccdiecl6znsfcys4

by Piotr Szymczyk, Ewa Skała, Renata Grąbkowska, Agnieszka Jeleń, Marta Żebrowska, Ewa Balcerczak

Published in Acta Societatis Botanicorum Poloniae by Polish Botanical Society.

2016   Volume 85

Abstract

The promoter, 5' UTR, and 34-nt 5' fragments of protein encoding region of the <em>Salvia miltiorrhiza</em> copalyl diphosphate synthase gene were cloned and characterized. No tandem repeats, miRNA binding sites, or CpNpG islands were observed in the promoter, 5' UTR, or protein encoding fragments. The entire isolated promoter and 5' UTR is 2235 bp long and contains repetitions of many <em>cis</em>-active elements, recognized by homologous transcription factors, found in <em>Arabidopsis thaliana</em> and other plant species. A pyrimidine-rich fragment with only 6 non-pyrimidine bases was localized in the 33-nt stretch from nt 2185 to 2217 in the 5' UTR. The observed <em>cis</em>-active sequences are potential binding sites for <em>trans</em>-factors that could regulate spatio-temporal <em>CPS</em> gene expression in response to biotic and abiotic stress conditions. Obtained results are initially verified by in silico and co-expression studies based on <em>A. thaliana</em> microarray data.The quantitative RT-PCR analysis confirmed that the entire 2269-bp copalyl diphosphate synthase gene fragment has the promoter activity.Quantitative RT-PCR analysis was used to study changes in <em>CPS</em> promoter activity occurring in response to the application of four selected biotic and abiotic regulatory factors; auxin, gibberellin, salicylic acid, and high-salt concentration.
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