Abstract
Rapeseed (Brassica napus L.) has become an important crop during the last 30years. In addition to a high lipid level, the seeds also have a significant protein content, which constitutes 20-25% of the dry seed weight. The synthesis of storage proteins is primarily controlled at transcriptional level and seed-specific expression has been shown to be conferred upon the promoter regions of many storage protein genes. Napin is one of the main storage proteins in rapeseed(')s embryo that is produced in seed developing stage. Its promoter region located at 5' upstream of the napin gene has already been isolated (GenBank number, EU416279.1). In current research, seed-specific promoter (napin) of Iranian B. napus L. was isolated from the genomic DNA and cloned into pBI121 plant binary vector to use in future researches. For this purpose, the napin promoter was amplified by PCR method using specific primers, cloned in pSK(+) vector and sequenced. Sequencing analysis showed that the cloned promoter contained all of conserved motifs such as TATA box (TATAAA), RY repeats (CATGCA), dist-B (TCAAACACC) and prox-B elements (GCCACTTGTC), G-box (CACGTG) and CAAT Motifs, which constituted the seed-specific promoter activity and according to this ...Continue Reading
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