Chem. J. Chinese Universities ›› 2023, Vol. 44 ›› Issue (3): 20220246.doi: 10.7503/cjcu20220246

• Article • Previous Articles     Next Articles

Characterization of an RNA-Cleaving TNA Enzyme and Application in MicroRNA Cleavage

SUN Xin, GAO Mingmei, ZHANG Ze, WANG Haiyan, YU Hanyang()   

  1. State Key Laboratory of Coordination Chemistry,College of Engineering and Applied Sciences,Chemistry and Biomedicine Innovation Center,Jiangsu Key Laboratory of Artificial Functional Materials,Nanjing University,Nanjing 210023,China
  • Received:2022-04-14 Online:2023-03-10 Published:2023-03-14
  • Contact: YU Hanyang E-mail:hanyangyu@nju.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(21977046)

Abstract:

In this work, we systematically characterized a previously identified RNA-cleaving threose nucleic acid(TNA) enzyme 6-29 including the substrate sequence requirement and reaction rate constant, and further demonstrated its application in microRNA cleavage. It was revealed that 6-29 possessed a relatively broad substrate sequence scope and was able to cleave RNAs with distinct sequences and cleavage sites. Moreover, TNA enzyme 6-29 remained active in the presence of a variety of metal ions such as Mg2+ and Mn2+, and functioned under a multi-turnover condition. Lastly, it was demonstrated that 6-29 catalysed site-specific cleavage reactions on severaldifferent microRNA sequences. This work highlights catalytic TNA as a promising molecular tool, which could be developed to act as a key functional element in disease theranostics.

Key words: Nucleic acid chemistry, Xenobiological nucleic acid, Threose nucleic acid, Ribozyme, Functional nucleic acid

CLC Number: 

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