›› 2015, Vol. 58 ›› Issue (7): 712-720.doi:

• 研究论文 • 上一篇    下一篇

家蚕Bcl-2家族基因 BmBuffy 的克隆及表达分析

张金叶1,2, 赵元莙1 , 乔梁1, 潘敏慧2,3, 鲁成2,3,*   

  1. (1. 重庆师范大学动物生物学重庆市重点实验室, 重庆 401331; 2. 西南大学家蚕基因组国家重点实验室, 重庆 400716; 3. 西南大学农业部蚕桑功能基因组和生物技术重点实验室, 重庆 400716)
  • 出版日期:2015-07-20 发布日期:2015-07-20
  • 作者简介:张金叶, 女, 1979年9月生, 河北保定人, 博士, 讲师, 研究方向为细胞凋亡调控机制, E-mail: yjz0916@163.com

Cloning and expression analysis of Bcl-2 family gene BmBuffy in the silkworm, Bombyx mori (Lepidoptera: Bombycidae)

ZHANG Jin-Ye1,2, ZHAO Yuan-Jun1, QIAO Liang1, PAN Min-Hui2,3, LU Cheng2,3,*   

  1. (1. Chongqing Key Laboratory of Animal Biology, Chongqing Normal University, Chongqing 401331, China; 2. State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400716, China; 3. The Key Laboratory for Sericulture Functional Genomics and Biotechnology of Agricultural Ministry, Southwest University, Chongqing 400716, China)
  • Online:2015-07-20 Published:2015-07-20

摘要: 【目的】本研究旨在获得家蚕 Bombyx mori  Bcl-2家族同源基因,并分析其在不同组织和发育阶段的时空表达模式及功能。【方法】用cDNA末端快速扩增方法(rapid amplification of cDNA ends, RACE)克隆家蚕Bcl-2家族基因BmBuffy,利用SSR分子标记连锁分析确定其染色体定位。同时,用RT-PCR和qPCR技术分析该基因在家蚕幼虫及变态期间不同组织中的表达。【结果】克隆获得全长家蚕Bcl-2家族同源基因 BmBuffy,证明该基因位于第 4号染色体上,开放阅读框长879 bp,编码292 aa,预测其分子量大小为32.4 kDa,等电点为9.94,且第130-231位氨基酸之间存在1个Bcl-2_like Superfamily结构域。系统进化发育树表明,其与黑腹果蝇Drosophila melanogaster的DmBuffy关系最近,氨基酸序列一致性为27%。BmBuffy在幼虫组织中的表达结果显示,其在马氏管中表达量最高,而且在不同组织变态期的关键时间点均有明显变化。【结论】家蚕BmBuffy具有Bcl-2家族典型结构域,BmBuffy定位于第 4号染色体上,BmBuffy在家蚕变态期的组织生理变化中起到一定作用。本文为进一步研究家蚕Bcl-2家族基因的功能奠定基础。

关键词: 家蚕, Bcl-2家族, 基因克隆, 表达分析, 染色体定位

Abstract: 【Aim】 This study aims to clone a Bcl-2 family member gene from the silkworm, Bombyx mori, and explore its expression profiles and roles in different larval tissues and developmental stages of the moth. 【Methods】 BmBuffy was cloned using rapid amplification of cDNA ends (RACE) method. RT-PCR and qPCR were used to detect the gene expression profiles. The chromosome localization of this gene was conducted using SSR markers. 【Results】 The Bcl-2 family member gene cloned in B. mori was named BmBuffy, which is located on chromosome No. 4, coding a protein of 292 aa with an estimated molecular weight of 57.8 kDa and pI of 9.94. Its encoded protein also possesses a Bcl-2 like superfamily domain between 130-231 residues. Phylogenetic analysis revealed that BmBuffy is homologous to DmBuffy of Drosophila melanogaster with 27% amino acid sequence identity. The expression profiles in different larval tissues showed that BmBuffy had the highest expression level in Malpighian tubules. There was significant variation in the transcription level of BmBuffy in different developmental stages including metamorphosis. 【Conclusion】 BmBuffy has the typical Bcl-2 family domain, BmBuffy is located on chromosone No.4, and BmBuffy might play a role in the alteration of tissue physiology during metamorphosis. This study lays a foundation for further study on the function of Bcl-2 family genes in B. mori.

Key words: Bombyx mori , Bcl-2 family, gene cloning, expression profiling, chromosome localization