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Computational Simulation of Aptamer-target Binding Mechanisms
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作者 YANG Yuan-Yuan XU Fei WU Xiu-Xiu 《中国生物化学与分子生物学报》 CAS CSCD 北大核心 2024年第11期1550-1562,共13页
Aptamers are a type of single-chain oligonucleotide that can combine with a specific target.Due to their simple preparation,easy modification,stable structure and reusability,aptamers have been widely applied as bioch... Aptamers are a type of single-chain oligonucleotide that can combine with a specific target.Due to their simple preparation,easy modification,stable structure and reusability,aptamers have been widely applied as biochemical sensors for medicine,food safety and environmental monitoring.However,there is little research on aptamer-target binding mechanisms,which limits their application and development.Computational simulation has gained much attention for revealing aptamer-target binding mechanisms at the atomic level.This work summarizes the main simulation methods used in the mechanistic analysis of aptamer-target complexes,the characteristics of binding between aptamers and different targets(metal ions,small organic molecules,biomacromolecules,cells,bacteria and viruses),the types of aptamer-target interactions and the factors influencing their strength.It provides a reference for further use of simulations in understanding aptamer-target binding mechanisms. 展开更多
关键词 computational simulation APTAMER TARGET binding mechanism intermolecular forces
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烟草卵细胞特异表达基因的克隆与分析
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作者 罗岸 《浙江农业学报》 CSCD 北大核心 2017年第3期360-365,共6页
构建烟草卵细胞和合子的cDNA文库,通过抑制性差减杂交和镜像选择进行卵细胞特异表达基因的筛选。筛选结果得到一个卵细胞特异表达的,与胱天蛋白酶基因类似(CASP-like)的基因NtEE1。生物信息学分析表明,NtEE1蛋白由194个氨基酸组成,含有... 构建烟草卵细胞和合子的cDNA文库,通过抑制性差减杂交和镜像选择进行卵细胞特异表达基因的筛选。筛选结果得到一个卵细胞特异表达的,与胱天蛋白酶基因类似(CASP-like)的基因NtEE1。生物信息学分析表明,NtEE1蛋白由194个氨基酸组成,含有4个跨膜结构域。NtEE1-GFP融合蛋白的亚细胞定位也显示,该蛋白可能存在于质膜和核膜上。同时扩增拟南芥actin11基因的启动子序列驱动核定位GFP的表达,并对烟草进行异位转基因,结果发现,actin11在烟草卵细胞中具有较强的启动子活性。这些研究结果可以为通过RNAi和过表达来研究NtEE1基因在烟草卵细胞发育和在精、卵细胞相互作用中可能的功能提供理论基础。 展开更多
关键词 卵细胞 跨膜结构域 烟草 配子相互作用
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