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Gene. 2014 Jul 15;545(1):45-55. doi: 10.1016/j.gene.2014.05.008. Epub 2014 May 6.

Characterization of the promoter and 5'-UTR intron of oleic acid desaturase (FAD2) gene in Brassica napus.

Author information

  • 1Key Laboratory of Oil Crop Biology of Ministry of Agriculture, Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan, Hubei 430062, China; Pre-State Key Laboratory for Germplasm Innovation and Resource Utilization of Crops, Changsha 410128, PR China; The Oil Crops Research Institute/National Oil Crops Improvement Center, Changsha 410128, PR China.
  • 2The Oil Crops Research Institute/National Oil Crops Improvement Center, Changsha 410128, PR China.
  • 3Pre-State Key Laboratory for Germplasm Innovation and Resource Utilization of Crops, Changsha 410128, PR China; The Oil Crops Research Institute/National Oil Crops Improvement Center, Changsha 410128, PR China.
  • 4Key Laboratory of Oil Crop Biology of Ministry of Agriculture, Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan, Hubei 430062, China.
  • 5Pre-State Key Laboratory for Germplasm Innovation and Resource Utilization of Crops, Changsha 410128, PR China; The Oil Crops Research Institute/National Oil Crops Improvement Center, Changsha 410128, PR China. Electronic address: gcy20000@aliyun.com.

Abstract

In the present study, we characterized the transcriptional regulatory region (KF038144) controlling the expression of a constitutive FAD2 in Brassica napus. There are multiple FAD2 gene copies in B. napus genome. The FAD2 gene characterized and analyzed in the study is located on chromosome A5 and was designated as BnFAD2A5-1. BnFAD2A5-1 harbors an intron (1,192 bp) within its 5'-untranslated region (5'-UTR). This intron demonstrated promoter activity. Deletion analysis of the BnFAD2A5-1 promoter and intron through the β-glucuronidase (GUS) reporter system revealed that the -220 to -1 bp is the minimum promoter region, while -220 to -110 bp and +34 to +285 bp are two important regions conferring high-levels of transcription. BnFAD2 transcripts were induced by light, low temperature, and abscisic acid (ABA). These observations demonstrated that not only the promoter but also the intron are involved in controlling the expression of the BnFAD2A5-1 gene. The intron-mediated regulation is an essential aspect of the gene expression regulation.

Copyright © 2014 Elsevier B.V. All rights reserved.

KEYWORDS:

Arabidopsis thaliana; Brassica napus; FAD2; Intron; Microsomal oleate acid desaturase

PMID:
24811682
[PubMed - indexed for MEDLINE]
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