MNAzymes, a versatile new class of nucleic acid enzymes that can function as biosensors and molecular switches.

MNAzymes, a versatile new class of nucleic acid enzymes that can function as biosensors and molecular switches.
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DOI:
10.1021/ja9076777
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发表时间:
2010-01-27
影响因子:
15
通讯作者:
Todd, Alison V.
Todd, Alison V.
中科院分区:
化学1区
文献类型:
--
作者:
Mokany, Elisa;Bone, Simon M.;Young, Paul E.;Doan, Tram B.;Todd, Alison V.

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为了增加核酸酶的通用性和实用性,我们开发了多组分复合物,称为MNAzymes,其响应于特定的“输入”信号而产生放大的“输出”信号。多个寡核苷酸部分酶仅在输入组装促进剂如靶核酸存在下组装成活性MNA酶。一旦形成,MNA酶催化修饰通用底物,产生放大的输出信号,其预示靶标的存在,同时使靶标保持完整。我们展示了几种应用,包括敏感的,等温的目标检测;多态性的歧视;和高度特异性的实时聚合酶链反应(PCR)监测。此外,我们还展示了它们作为分子开关的功能,以及串联工作以创建分子级联的能力。MNAzymes的模块化性质,以及输入和输出功能的分离,为它们集成到不同的设备,如诊断生物传感器,分子计算机和/或纳米级机器提供了潜力。
To increase the versatility and utility of nucleic acid enzymes, we developed multicomponent complexes, known as MNAzymes, which produce amplified “output” signals in response to specific “input” signals. Multiple oligonucleotide partzymes assemble into active MNAzymes only in the presence of an input assembly facilitator such as a target nucleic acid. Once formed, MNAzymes catalytically modify a generic substrate, generating an amplified output signal that heralds the presence of the target while leaving the target intact. We demonstrated several applications including sensitive, isothermal target detection; discrimination of polymorphisms; and highly specific monitoring of real-time polymerase chain reaction (PCR). Furthermore, we showed their capacity to function as molecular switches and to work in series to create a molecular cascade. The modular nature of MNAzymes, together with the separation of input and output functionalities, provides potential for their integration into diverse devices such as diagnostic biosensors, molecular computers, and/or nanoscale machines.
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