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Molecular characterization and expression analysis of Turtle protein in silkworm that is associated with Nosema bombycis infection

文献类型： 外文期刊

作者： Zhu, Feng 1 ; Xiao, Shengyan 1 ; Zhang, Yonghong 1 ; Shao, Yulan 1 ; Tang, Fenfen 1 ; Chen, Shiliang 1 ; Bai, Xingrong 1 ;

作者机构： 1.Yunnan Acad Agr Sci, Inst Sericulture & Apiculture, Mengzi 661101, Yunnan, Peoples R China

关键词： Bombyx mori;Turtle/IGSF9;Sequence analysis;Expression;Nosema bombycis

期刊名称：INFECTION GENETICS AND EVOLUTION （ 影响因子：3.342； 五年影响因子：3.188 ）

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收录情况： SCI

摘要： In this report, we describe the cloning and characterization of a member of the immunoglobulin superfamily (IgSF); i.e., Turtle. The cDNA of Turtle was cloned from the silkworm Bombyx mori using the rapid amplification of cDNA ends (RACE) technique. Three isoforms of Bombyx Turtle were obtained, including Bmtutl-464, Bmtutl-519, and Bmtutl-810. The three isoforms had identical 27-amino acid signal peptides and four extracellular immunoglobulin (Ig) domains (IgI-IgIV). Sequence similarity and phylogenic analysis indicated that Bmtutl-810 belongs to the group of insect Turtle isoforms and shares 76.2% identity with Drosophila Turtle. Quantitative real-time PCR analysis revealed that the Bombyx Turtle isoforms were expressed throughout the entire development period, the highest levels of expression of Bmtutl-464 and Bmtutl-519 were observed at the second instar larvae stage, whereas that of Bmtutl-810 peaked at the embryonic stage. The ubiquitous expression of Bmtutl-464, Bmtutl-519, and Bmtutl-810 were observed in all studied tissues, except for Bmtutl-519 in the silk gland. The expression level of Bmtutl-464 was highest in the ovary, whereas that of Bmtunl-519 and Bmtutl-810 was highest in the hemolymph. Bmtutl-519 was upregulated in BmN cells infected by Nosema bombycis, We speculated that Bombyx Turtle was not only involved in neural development in silkworm, as well as Drosophila Turtle, but was also involved in the regulation of other biological functions. For example, Bmtutl-519 might be involved in N. bombycis infection and may play an important role in the immune response of silkworms to N. bombycis infection. (C) 2017 Elsevier B.V. All rights reserved.

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