摘要
O-GlcNAc修饰作用是一种普遍存在的动态可逆的糖基化修饰作用,由O-GlcNAc转移酶(OGT)与O-GlcNAc水解酶(OGA)负责调控。以亚洲玉米螟5龄幼虫为对象,克隆获得了全长O-GlcNAc水解酶(OfOGA)基因,其长度为3 541bp,其中5'-非编码区的长度为241bp,编码区的长度为3 165bp,3'-非编码区的长度为132bp;实现了OfOGA在原核表达载体中的重组表达。重组OfOGA由1 055个氨基酸构成,理论分子量118kDa,但SDS-PAGE电泳显示其实际分子量为130kDa。重组OfOGA的最适pH为5.5,最适温度为50℃。亚洲玉米螟OfOGA基因的获得与表达有助于理解OGA在昆虫生长发育中的作用,提供可能的生物防治靶标。
O-GlcNAcylation is a dynamic and reversible process,regulated by two key enzymes O-GlcNAc transferase(OGT) and O-GlcNAcase(OGA).An insect OGA gene was extracted from the fifth instar larva of the Asian corn borer Ostrinia furnacalis(Guenee).Full length OfOGA gene was 3 541bp,containing 241bp 5′-UTR,3 165bp coding region and 132bp 3′-UTR.Open reading frame(ORF) of OfOGA was cloned and expressed in E.coli.The recombinant OfOGA consisted of 1 055 amino acids,with a theoretical molecular weight of 118 kDa,but an apparent molecular weight of 130 kDa by SDS-PAGE.Its optimal pH was 5.5,and the optimum temperature was 50℃.Recombinant expression of OfOGA may facilitate the understanding of its role in insect development and growth,and provide potential biological control target.
出处
《中国生物工程杂志》
CAS
CSCD
北大核心
2012年第5期36-42,共7页
China Biotechnology
基金
国家自然科学基金(31070715)
国家"973"计划(2010CB126100)资助项目