Identification of cotton microRNAs and their targets

文献类型： 外文期刊

第一作者： Baohong Zhang

作者： Baohong Zhang;Qinglian Wang;Kunbo Wang;Xiaoping Pan;Fang Liu;Tenglong Guo;George P. Cobb;Todd A. Anderson

作者机构：

关键词： cotton;microRNA;homolog;comparative genomics;genomic survey sequence;expressed sequence tag;posttranscriptional gene regulation

期刊名称：GENE （ 影响因子：3.688； 五年影响因子：3.329 ）

ISSN： 0378-1119

年卷期： 2007 年 397 卷 1-2 期

页码：

收录情况： SCI

摘要： No study has been performed on identifying microRNAs (miRNAs) and their targets in cotton although cotton is one of the most important fiber and economic crops around the world. In this study, we found 30 potential cotton miRNAs using a comparative genomic approach based on genomic survey sequence analysis and miRNA secondary structure. These cotton miRNAs belong to 22 miRNA families. Expressed sequence tag (EST) analysis indicated that the predicted miRNAs were expressed in cotton plants. Based on the characteristic that miRNAs exhibit perfect or nearly perfect complementarity with their targeted mRNA sequences, a total of 139 potential rniRNA targets were identified in cotton genome. A majority of these targets belong to transcriptional factors which regulate cotton growth and development, including leaf, root, stem, flower, and even fiber development. Those miRNAs may also be involved in other cellular and metabolic processes, such as stress response, signal transduction, and secondary wall synthesis and deposition. Some of the newly identified miRNA targets may be unique to cotton species. In this study, we found that at least 3 miRNA families (miR 396, 414, and 782) target callous synthase, fiber protein Fb23, and fiber quinone-oxidoreductase, suggesting that miRNAs play an important role in cotton fiber differentiation and development. (C) 2007 Elsevier B.V. All rights reserved.

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