摘要
:Bm NPV gp64 基因在杆状病毒分子生物学和杆状病毒表达系统研究中具有重要的作用,以AcMNPV gp64 基因为探针,杂交显示Bm NPV gp64 基因定位于其基因组Bam HI酶切的4 .2kb 和7-4kb 片段上,克隆阳性片段,重组质粒分别命名为pZDBM42 和pZDBM74 。对重组质粒进一步杂交,将片断更精确定位于0-45kb 片段、0-75kb 片断上和1-15kb 片断上,将三个片断DNA 进行序列分析,结果表明:Bm NPV 的gp64 基因的开放阅读框(ORF) 有1530 核苷酸,编码509 个氨基酸。序列同源性比较显示,Bm NPV gp64 基因和AcMNPVgp64 基因的核苷酸序列同源性达84-3 % ,氨基酸序列同源性达94-7 % 。Bm NPV gp64 基因C 端的信号肽序列和N 端的锚定序列对于Bm NPV 表达系统的改进具有重要的意义。
gp64 glycoprotein, an abundant and the only membrane glycoprotein encoded by the baculovirus genome, contains a signal peptide sequence at N\|terminus, a transmembrane anchor at c\|terminus and a ectodomain between them. The efficient signal seguences and the transmembrane anchor sequences of AcMNPV gp64 gene have been exploited in baculovirus expression system. Using 1.3kb AcMNPV gp64 gene coding sequence as the probe, the nucleotide sequence of BmNPV gp64 gene was determined, and a 1530 nucleotide open reading frame flanked by an AT\|rich sequence was identified that could encode a polypeotide with 509 amino acid residues. Computer analysis indicated BmNPV gp64 gene is 84.3% identical to AcMNPV at the level of nucleotide sequence and 94.7% identical at the level of predicted amino acid sequence.
出处
《微生物学报》
CAS
CSCD
北大核心
2000年第1期38-43,共6页
Acta Microbiologica Sinica
基金
国家教委跨世纪人材计划基金