A novel male-specific SET domain-containing gene setdm identified from extra microchromosomes of gibel carp males  

作　　者：Xi-Yin Li Xiao-Li Liu Miao Ding Zhi Li Li Zhou Xiao-Juan Zhang Jian-Fang Gui 

机构地区：[1]Stare Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Wuhan 4.30072, China

出　　处：《Science Bulletin》2017年第8期528-536,共9页科学通报（英文版）

基　　金：supported by the National Natural Science Foundation of China (31502148);the Strategic Priority Research Program of the Chinese Academy of Sciences (XDA08030201);the Young Elite Scientist Sponsorship Program by CAST (2016040210);the earmarked fund for Modern Agro-industry Technology Research System (NYCYTX-49);the State Key Laboratory of Freshwater Ecology and Biotechnology (2016FBZ01);the Institute of Hydrobiology, Chinese Academy of Sciences (Y45A171)

摘　　要：Various genes have been screened on extra chromosomes, but their molecular characterization, expression pattern and biological function are still unclear. Here, we utilized a male-specific sequence of polyploid gibel carp （Carassius gibelio） to identify a novel male-specific SET （Su（var）3-9, Enhancer- of-zeste, Trithorax） domain-containing gene setdm on extra microchromosomes of gibel carp males. And setdm was characterized in molecule and expression aspects, in which its expression was specific to testis, and had relative high transcription during middle/late stages of testis development. Moreover, prominent expression of Setdm in spermatogenic cells was observed in testis through immunofluorescence co-localization analysis. These results suggest that biological function of setdrn might be related to testis development and spermatogenesis of gibel carp. Additionally, the homeologous gene setdmf of setdm, was also characterized, and its expression was gonad-specific, in which its expressed product was detected to mainly distribute in gametogenic cells of testis and ovary, and to have dynamic expression pattern similar to that of setdm. Based on the current results, we propose that the novel male-specific setdm on extra microchromosomes might be functional divergence gene of the gonad-specific setdmf. Therefore, these findings will help us to further understand evolutionary fate and functional role of genes on extra microchromosomes.Various genes have been screened on extra chromosomes, but their molecular characterization,expression pattern and biological function are still unclear. Here, we utilized a male-specific sequence of polyploid gibel carp(Carassius gibelio) to identify a novel male-specific SET(Su(var)3–9, Enhancerof-zeste, Trithorax) domain-containing gene setdm on extra microchromosomes of gibel carp males.And setdm was characterized in molecule and expression aspects, in which its expression was specific to testis, and had relative high transcription during middle/late stages of testis development.Moreover, prominent expression of Setdm in spermatogenic cells was observed in testis through immunofluorescence co-localization analysis. These results suggest that biological function of setdm might be related to testis development and spermatogenesis of gibel carp. Additionally, the homeologous gene setdmf of setdm, was also characterized, and its expression was gonad-specific, in which its expressed product was detected to mainly distribute in gametogenic cells of testis and ovary, and to have dynamic expression pattern similar to that of setdm. Based on the current results, we propose that the novel male-specific setdm on extra microchromosomes might be functional divergence gene of the gonad-specific setdmf. Therefore, these findings will help us to further understand evolutionary fate and functional role of genes on extra microchromosomes.

关 键 词：Microchromosomes Snpernumerary chromosomes Sex determination SPERMATOGENESIS POLYPLOID 

分 类 号：Q953[生物学—动物学]