Open AccessInsertion efficiency of Tgf2 transposon in the genome of Megalobrama amblycephala
Author(s) -
Xiu-Ming Guo,
Chuangxin Huang,
Ren Fang Shen,
XiaYun Jiang,
Jie Chen,
Shuming Zou
Publication year - 2013
Publication title -
yichuan
Language(s) - English
Resource type - Journals
ISSN - 0253-9772
DOI - 10.3724/sp.j.1005.2013.00999
Subject(s) - megalobrama , transposable element , biology , genetics , transposase , transposition (logic) , genome , plasmid , sleeping beauty transposon system , gene , microbiology and biotechnology , linguistics , philosophy
To study insertion efficiency of goldfish Tgf2 transposon in the genome of Megalobrama amblycephala, we built Tgf2-Mlyz2-RFP donor plasmid with goldfish Tgf2 transposon left and right arms, and then co-injected with goldfish Tgf2 transposase mRNA into the 1-2 cell stage fertilized eggs of M. amblycephala. In 30 d- and 180 d-stage larval, RFP fluorescence can be observed in back and side muscle of the fish. The rate of RFP fluorescence expression was 48.1%. In adult fish, PCR results demonstrated that integration efficiency of goldfish Tgf2 transposition system was 31.5% in M. am-blycephala genome. RT-PCR analysis showed that RFP RNAs were highly transcribed among all the 12 tissues in three transgenic fishes, while it could be highly detected only in muscle, skin, and kidney in another two individuals. Our results suggested that RFP expression in tissues vaied among different M. amblycephala. By means of the inverse PCR, the copy numbers of Tgf2 transposon were at least 2 in transgenic M. amblycephala. The average copy number of each fish was about 5. Over 50% of flanking sequences at the insertion site have homologous sequence in other vertebrate species. Our data suggest that goldfish Tgf2 transposon can efficiently mediate gene insertion in M. amblycephala, which could been used in transgene and gene trap in M. amblycephala.