摘要
本研究旨在利用单碱基编辑系统(single base editing system)实现欧拉藏绵羊成纤维细胞FecB和GDF9基因靶位点A到G和C到T的碱基替换并检测其编辑效率。首先设计合成靶向欧拉藏绵羊FecB和GDF9基因的sgRNA序列,再分别连接至epi-ABEmax、epi-BE4max质粒,构建载体并电转至欧拉藏绵羊成纤维细胞,最后对阳性细胞FecB和GDF9基因进行Sanger测序鉴定靶位点突变结果,并通过T-A克隆估算单碱基编辑系统的编辑效率。结果显示获得了靶向欧拉藏绵羊FecB和GDF9基因的sgRNA,并构建使欧拉藏绵羊FecB和GDF9基因单碱基突变的载体,FecB基因靶位点编辑效率为39.13%,GDF9基因靶位点(G260、G721、G1184)编辑效率分别为10.52%、26.67%和8.00%。本研究运用单碱基编辑系统在欧拉藏绵羊成纤维细胞上实现了FecB和GDF9基因靶位点突变,为改良欧拉藏绵羊一胎多羔的繁殖性状奠定理论基础。
In this study,a single base editing system was used to edit the FecB and GDF9 gene to achieve a targeted site mutation from A to G and from C to T in Ouler Tibetan sheep fibroblasts,and to test its editing efficiency.Firstly,we designed and synthesized sgRNA sequences targeting FecB and GDF9 genes of Ouler Tibetan sheep,followed by connection to epi-ABEmax and epi-BE4max plasmids to construct vectors and electrotransfer into Ouler Tibetan sheep fibroblasts.Finally,Sanger sequencing was performed to identify the target point mutation of FecB and GDF9 genes positive cells.T-A cloning was used to estimate the editing efficiency of the single base editing system.We obtained gRNA targeting FecB and GDF9 genes and constructed the vector aiming at mutating single base of FecB and GDF9 genes in Ouler Tibetan sheep.The editing efficiency for the target site of FecB gene was 39.13%,whereas the editing efficiency for the target sites(G260,G721 and G1184)of GDF9 gene were 10.52%,26.67% and 8.00%,respectively.Achieving single base mutation in FecB and GDF9 genes may facilitate improving the reproduction traits of Ouler Tibetan sheep with multifetal lambs.
作者
赵逸凡
张迎冰
于芮峦
吴英
陈永忠
赵若琳
张成图
苏建民
ZHAO Yifan;ZHANG Yingbing;YU Ruiluan;WU Ying;CHEN Yongzhong;ZHAO Ruolin;ZHANG Chengtu;SU Jianmin(Key Laboratory of Animal Biotechnology of the Ministry of Agriculture,College of Veterinary Medicine,Northwest A&F University,Yangling 712100,Shaanxi,China;Xining Center for Animal Disease Prevention and Control,Xining 810016,Qinghai,China)
出处
《生物工程学报》
CAS
CSCD
北大核心
2023年第1期204-216,共13页
Chinese Journal of Biotechnology
基金
青海省“昆仑英才·高端创新创业人才”计划
青海省重点研发与转化计划(2022-QY-209)。