文献类型: 外文期刊
作者: Wang, Y. B. 1 ; Guan, L. L. 2 ; Xu, Y. W. 1 ; Shen, H. 1 ; Wu, W. 1 ;
作者机构: 1.Sichuan Agr Univ, Agron Coll, Wenjiang, Peoples R China
2.Chinese Acad Trop Agr Sci, Trop Crops Genet Resources Inst, Haikou, Peoples R China
关键词: Betaine aldehyde dehydrogenase;Phylogenetic analysis;Safflower;Secondary structure;Subcellular localization
期刊名称:GENETICS AND MOLECULAR RESEARCH ( 影响因子:0.764; 五年影响因子:0.912 )
ISSN: 1676-5680
年卷期: 2014 年 13 卷 1 期
页码:
收录情况: SCI
摘要: In response to salinity or drought stress, many plants accumulate glycine betaine, which is a regulator of osmosis. In plants, the last step in betaine synthesis is catalyzed by betaine aldehyde dehydrogenase (BADH), a nuclear-encoded chloroplastic enzyme. Based on the conserved oligo amino acid residues of the published BADH genes from other higher plant species, a cDNA sequence, designated CtBADH, was isolated from safflower (Carthamus tinctorius L.) using a polymerase chain reaction approach. The clones were 1.7 kb on average, and contained an open reading frame predicting a polypeptide of 503 amino acids with 84.5% identity to that of Helianthus annuus. The deduced amino acid sequence showed a decapeptide, Val-Thr-Leu-Geu-Leu-Gly-Gly-Lys-Ser-Pro and Cys, which is essential for proper functioning of BADH. Phylogenetic analysis indicated that CtBADH grouped with other dicotyledonous plant BADH genes, and subgrouped in the composite family. Prediction of secondary structure and subcellular localization suggested that the protein encoded by CtBADH contains 33 coils, 15 alpha helixes, and 21 beta strands, and most likely targets the chloroplast or mitochondria.
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