在转基因水稻植株中蜡质基因第1内含子对基因表达影响的分析
程世军, 葛鸿飞, 王宗阳, 洪孟民
中科院上海植物生理研究所.上海 200032
摘要
第1内含子的缺失或此内含子的5^端剪接点上的碱基G以T替换均造成GUS活性的急剧下降,说明第1内含子在植株体内的确有增强基因表达的功能,而且在中、低直链淀粉含量的水稻品种中Wx基因第1内含子5^端剪接点上自然存在的G→T突变是造成这些品种中该内含子剪接不正常、从而使Wx基因表达水平和直链淀粉含量下降的主要原因。
Analysis of influence of Wx intron 1 on gene expression in transgenic rice plant
Cheng Shijun, Ge Hongfei, Wang Zongyang, Hong Mengmin
Shanghai Institute of Plant Physiology,Chinese Academy of Sciences.Shanghai 200032
Abstract
Results show that either the deletion of intron 1 or a single base mutation (G→T) at the 5^ splice site of Wx intron 1 decreased the expression of GUS gene. These results indicate that in vivo the intron 1 indeed enhances the gene expression, and the G→T mutation in Wx intron 1 of rice cultivars with intermediate/low amylose content is, probably the key factor causing abnormal splicing of this intron in these cultivars.
Key words: Wx gene;Intron 1;Gene expression
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引用本文:
程世军, 葛鸿飞, 王宗阳, 洪孟民. 在转基因水稻植株中蜡质基因第1内含子对基因表达影响的分析[J]. 生理学报 2001; 53 (5): .
Cheng Shijun, Ge Hongfei, Wang Zongyang, Hong Mengmin. Analysis of influence of Wx intron 1 on gene expression in transgenic rice plant. Acta Physiol Sin 2001; 53 (5): (in Chinese with English abstract).