Molecular cloning and mRNA expression profile of Sucrose Transporter Gene BnSUT1C from Brassica napus L.
文献类型： 外文期刊
作者： Li, FuPeng 1 ; Yan, Lin 2 ; Lai, Jianxiong 2 ; Ma, ChaoZhi 1 ; Gautam, Mayank 1 ; Fu, TingDong 1 ;
作者机构： 1.Huazhong Agr Univ, Natl Key Lab Crop Genet Improvement, Wuhan 430070, Peoples R China
2.Chinese Acad Trop Agr Sci, Spice & Beverage Res Inst, Wanning 571533, Peoples R China
期刊名称：INDIAN JOURNAL OF EXPERIMENTAL BIOLOGY （ 影响因子：0.818； 五年影响因子：1.006 ）
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收录情况： SCI
摘要： The genomic and cDNA sequences of BnSUT1C were isolated from B. napus. Combination of cDNA and genomic DNA sequences revealed that the BnSUT1C gene contained three exons and two introns. The cDNA encodes a protein of 513 amino acids with a calculated molecular mass of 54.7 kDa and an isoelectric point of 9.12. It exhibits typical features of sucrose transporter with 12 trans-membranes spanning domains. BnSUT1C showed highly homologous with AtSUC1 and AtSUC5. A histidine residue, which is conserved across all functional sucrose transporter proteins in higher plants, is located at position 66 of the BnSUT1C. Two putative pollen-specific cis-elements, AGAAA and GTGA motifs, are located in 5'-upstream of BnSUT1C. The spatial and temporal expression patterns carried out by semi-quantitative RT-PCR and Real-Time PCR, which indicated that BnSUT1C predominantly expressed in later developmental stages of anther, as tapetal cells began to shrink and collapse. BnSUT1C could mediate the uptake of sucrose in the pollen and retrieval of tapetal degenerated products during pollen maturation.
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