Molecular cloning and characterization of GhAPm, a gene encoding the mu subunit of the clathrin-associated adaptor protein complex that is associated with cotton (Gossypium hirsutum) fiber development

文献类型： 外文期刊

第一作者： Zhou, Tao

作者： Zhou, Tao;Zhang, Rui;Yang, Dawei;Guo, Sandui

作者机构：

关键词： clathrin;genomic DNA;open reading frame;cis-acting elements;adaptor protein: mu subunit;GhAPm protein;genetic similarity;intracellular trafficking mechanism

期刊名称：MOLECULAR BIOLOGY REPORTS （ 影响因子：2.316； 五年影响因子：2.357 ）

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收录情况： SCI

摘要： The clathrin-associated adaptor protein (AP) complexes are the primary clathrin adaptors that contribute to the formation of clathrin-coated vesicles (CCVs). The GhAPm gene (GenBank accession number: GU359054), which encodes the medium subunit of the AP complexes, was cloned from cotton by rapid amplification of cDNA ends-polymerase chain reaction (RACE-PCR). The full-length cDNA was 1590 bp in size and encoded an open reading frame (ORF) of 416 amino acids with a molecular weight of 46 kDa. The GhAPm protein shared 81-85% identity at the amino acid level with the AP complex mu subunits isolated from Vitis vinifera, Glycine max, Populus trichocarpa, Ricinus communis and Arabidopsis thaliana, respectively. The corresponding genomic DNA, containing eight exons and seven introns, was isolated and analyzed. Also, a 5'-flanking region was analyzed, and a group of putative cis-acting elements were identified. DNA gel blot analysis showed that there is only one GhAPm gene in the cotton genome. Real-time RT-PCR analysis revealed that GhAPm is expressed in the root, stem, leaf, petal, ovule, and fiber. However, the interesting finding is that GhAPm expression level was shown to increase steadily as the cotton fiber develops. In 30 DPA fibers, expression increases sharply and arrives at a peak then the expression levels decrease rapidly. Based on these data, we propose that GhAPm has a critical role in cotton membrane trafficking and fiber development.

分类号： Q7

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