Molecular cloning and expression profiles of an insulin-like growth factor binding protein IGFBP5 in the pearl oyster, Pinctada fucata
文献类型： 外文期刊
作者： Fan, Sigang 1 ; Wang, Zhenzhen 1 ; Yu, Dahui 1 ; Xu, Youhou 2 ;
作者机构： 1.Chinese Acad Fishery Sci, Minist Agr, South China Sea Fisheries Res Inst, Key Lab South China Sea Fishery Resources Exploit, Guangzhou, Guangdong, Peoples R China
2.Qinzhou Univ, Guangxi Key Lab Beibu Gulf Marine Biodivers Conse, Qinzhou, Peoples R China
关键词： IGFBP5; expression profile; in situ hybridization; shell notching; Pinctada fucata
期刊名称：JOURNAL OF APPLIED ANIMAL RESEARCH （ 影响因子：1.63； 五年影响因子：1.727 ）
ISSN： 0971-2119
年卷期： 2018 年 46 卷 1 期
页码：
收录情况： SCI
摘要： The insulin-like growth factor binding protein (IGFBP) family participates in transportation, localization, and biological regulation of insulin-like growth factors (IGFs). In the present study, IGFBP5 gene from the Pinctada fucata (PfIGFBP5) was cloned and characterized. The full-length cDNA sequence (1319bp) contained an open reading frame of 399bp encoding a predicted protein of 132 amino acids. The amino acid sequence of PfIGFBP5 included an IGF binding domain and multiple cysteine residues. The genomic sequence of PfIGFBP5 consisted of three exons and two introns. PfIGFBP5 was found to be expressed in all tissues and developmental stages investigated, although the expression level was significantly higher in the pearl sac and in trochophore larvae than in other tissues or developmental stages (P<0.05). Expression of PfIGFBP5 was induced by notching the oyster shell margin; the gene was mainly expressed in the outer epithelium of the mantle, and to a lesser extent in the whole pearl sac, including connective tissues. These findings suggest that PfIGFBP5 is very likely to be involved in modulating biomineralization in the mantle and pearl sac of P.fucata since they are the main organs for shell or pearl formation.
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