[an error occurred while processing this directive]

高等学校化学研究 ›› 2023, Vol. 39 ›› Issue (6): 1092-1099.doi: 10.1007/s40242-023-3193-z

• Articles • 上一篇    下一篇

Colorimetric Recognition of 3,4-Dihydroxy-D,L-phenylalanine with Tetrapeptide-modified Copper Nanoparticles as Chiral Nanozymes

TIAN Lin1,2, CHENG Cheng1,3, ZHAO Zhenwen1,4, LIU Wei2, and QI Li1,4   

  1. 1. Beijing National Laboratory for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P.R. China;
    2. School of Pharmacy, Xinxiang Medical University, Xinxiang 453003, P.R. China;
    3. College of Chemistry & Environmental Science, Hebei University, Baoding 071002, P.R. China;
    4. School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, P.R. China
  • 收稿日期:2023-08-15 出版日期:2023-12-01 发布日期:2023-11-18
  • 通讯作者: QI Li, LIU Wei E-mail:qili@iccas.ac.cn;liuwei@xxmu.edu.cn
  • 基金资助:
    This work was supported by the National Natural Science Foundation of China (No.22274159).

Colorimetric Recognition of 3,4-Dihydroxy-D,L-phenylalanine with Tetrapeptide-modified Copper Nanoparticles as Chiral Nanozymes

TIAN Lin1,2, CHENG Cheng1,3, ZHAO Zhenwen1,4, LIU Wei2, and QI Li1,4   

  1. 1. Beijing National Laboratory for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P.R. China;
    2. School of Pharmacy, Xinxiang Medical University, Xinxiang 453003, P.R. China;
    3. College of Chemistry & Environmental Science, Hebei University, Baoding 071002, P.R. China;
    4. School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, P.R. China
  • Received:2023-08-15 Online:2023-12-01 Published:2023-11-18
  • Contact: QI Li, LIU Wei E-mail:qili@iccas.ac.cn;liuwei@xxmu.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (No.22274159).

摘要: The construct of artificial nanocatalyts by simulating natural enzymes and thereby bringing new properties for practical applications is still a challenging task to date. In this study, chiral tetrapeptide (L-phenylalanine-L-phenylalanine-L-cysteine-L-histidine)-engineered copper nanoparticles (FFCH@CuNPs) were fabricated as an artificial peroxidase (POD). More interestingly, the nano-catalysts exhibited chiral identification function. In comparison with other nanocatalysts like L-cysteine-, L-histidine-, chiral dipeptide (L-cysteine-L-histidine)-, or chiral tripeptide (L-phenylalanine-L-cysteine-L-histidine)-modified CuNPs, FFCH@CuNPs demonstrated higher POD-mimetic catalytic activity in the 3,3',5,5'-tetramethylbenzidine (TMB)-H2O2 system and stronger enantioselectivity in the recognition of 3,4-dihydroxy-D,L-phenylalanine (D,L-DOPA) enantiomers. Considering the strength difference between the intermolecular hydrogen bonding and the π-π interactions, the principle behind the chiral discrimination of D,L-DOPA was explored. Furthermore, higher contents of surface Cu2+ ions and hydroxyl radicals were found in the FFCH@CuNPs-D-DOPA-TMB-H2O2 system than in the FFCH@CuNPs-L-DOPA-TMB-H2O2 system. Based on these results, a protocol for distinguishing between D,L-DOPA enantiomers through colorimetric recognition was established. This study provides a new insight into the design and fabrication of oligopeptides@CuNPs-based chiral nanozymes with improved catalytic performance and features additional to those of natural enzymes.

关键词: Chiral nanozyme, Copper nanoparticle, 3,4-Dihydroxy-D,L-phenylalanine (D,L-DOPA), Enantioselectivity, Tetrapeptide ligand

Abstract: The construct of artificial nanocatalyts by simulating natural enzymes and thereby bringing new properties for practical applications is still a challenging task to date. In this study, chiral tetrapeptide (L-phenylalanine-L-phenylalanine-L-cysteine-L-histidine)-engineered copper nanoparticles (FFCH@CuNPs) were fabricated as an artificial peroxidase (POD). More interestingly, the nano-catalysts exhibited chiral identification function. In comparison with other nanocatalysts like L-cysteine-, L-histidine-, chiral dipeptide (L-cysteine-L-histidine)-, or chiral tripeptide (L-phenylalanine-L-cysteine-L-histidine)-modified CuNPs, FFCH@CuNPs demonstrated higher POD-mimetic catalytic activity in the 3,3',5,5'-tetramethylbenzidine (TMB)-H2O2 system and stronger enantioselectivity in the recognition of 3,4-dihydroxy-D,L-phenylalanine (D,L-DOPA) enantiomers. Considering the strength difference between the intermolecular hydrogen bonding and the π-π interactions, the principle behind the chiral discrimination of D,L-DOPA was explored. Furthermore, higher contents of surface Cu2+ ions and hydroxyl radicals were found in the FFCH@CuNPs-D-DOPA-TMB-H2O2 system than in the FFCH@CuNPs-L-DOPA-TMB-H2O2 system. Based on these results, a protocol for distinguishing between D,L-DOPA enantiomers through colorimetric recognition was established. This study provides a new insight into the design and fabrication of oligopeptides@CuNPs-based chiral nanozymes with improved catalytic performance and features additional to those of natural enzymes.

Key words: Chiral nanozyme, Copper nanoparticle, 3,4-Dihydroxy-D,L-phenylalanine (D,L-DOPA), Enantioselectivity, Tetrapeptide ligand