高等学校化学学报 ›› 2026, Vol. 47 ›› Issue (2): 20250405.doi: 10.7503/cjcu20250405

• 研究快报 • 上一篇    下一篇

Aerolysin纳米孔道探究硫酸乙酰肝素与金属离子的单分子相互作用

张鹏玲1, 高凡2, 陈嘉乐6, 邹爱华1(), 汤娟3(), 马慧4(), 蒋翠玲5(), 万永菁5(), 夏冰清6, 李铁海6(), 高召兵6, 应佚伦2(), 龙亿涛2   

  1. 1.上海师范大学化学与材料科学学院, 上海 200234
    2.南京大学化学学院, 分子传感与成像中心, 南京 210023
    3.江西师范大学化学与材料学院, 南昌 330022
    4.浙江理工大学化学与化工学院, 杭州 310018
    5.华东理工大学信息科学与工程学院, 上海 200237
    6.中国科学院上海药物研究所, 上海 201203
  • 收稿日期:2025-12-29 出版日期:2026-02-10 发布日期:2026-01-10
  • 通讯作者: 邹爱华 E-mail:aihuazou@shnu.edu.cn;juantang@jxnu.edu.cn;huima@zstu.edu.cn;cuilingjiang@ecust.edu.cn;wanyongjing@ecust.edu.cn;tiehaili@simm.ac.cn;yilunying@nju.edu.cn
  • 作者简介:汤 娟, 女, 博士, 教授, 主要从事功能材料性能分析及应用方面的研究. E-mail: juantang@jxnu.edu.cn
    马 慧, 女, 博士, 特聘教授, 主要从事单体碰撞电化学、 纳米孔道单分子分析方面的研究. E-mail: huima@zstu.edu.cn
    蒋翠玲, 女, 博士, 副教授, 主要从事智能信息处理方面的研究. E-mail: cuilingjiang@ecust.edu.cn
    万永菁, 女, 博士, 教授, 主要从事智能信息处理、 模式识别与机器学习方面的研究. E-mail: wanyongjing@ecust.edu.cn
    李铁海, 男, 博士, 研究员, 主要从事糖化学和糖药物学方面的研究. E-mail: tiehaili@simm.ac.cn
    应佚伦, 女, 博士, 教授, 主要从事单分子电化学测量方面的研究. E-mail: yilunying@nju.edu.cn
    第一联系人:共同第一作者.
  • 基金资助:
    上海市市级科技重大专项项目、 国家自然科学基金(32250019);上海市市级科技重大专项项目、 国家自然科学基金(22474055);中央高校基本科研业务费专项资金(020514380356)

Single-molecule Investigation of Heparan Sulfate-metal Ion Interactions Using Aerolysin Nanopore

ZHANG Pengling1, GAO Fan2, CHEN Jiale6, ZOU Aihua1(), TANG Juan3(), MA Hui4(), JIANG Cuiling5(), WAN Yongjing5(), XIA Bingqing6, LI Tiehai6(), GAO Zhaobing6, YING Yilun2(), LONG Yitao2   

  1. 1.College of Chemistry and Materials Science,Shanghai Normal University,Shanghai 200234
    2.Molecular Sensing and Imaging Center,School of Chemistry,Nanjing University,Nanjing 210023
    3.College of Chemistry and Materials,Jiangxi Normal University,Nanchang 330022
    4.School of Chemistry and Chemical Engineering; Zhejiang Sci?Tech University,Hangzhou 310018
    5.School of Information Science and Engineering,East China University of Science and Technology,Shanghai 200237
    6.Shanghai Institute of Materia Medica,Chinese Academy of Sciences,Shanghai 201203
  • Received:2025-12-29 Online:2026-02-10 Published:2026-01-10
  • Contact: ZOU Aihua E-mail:aihuazou@shnu.edu.cn;juantang@jxnu.edu.cn;huima@zstu.edu.cn;cuilingjiang@ecust.edu.cn;wanyongjing@ecust.edu.cn;tiehaili@simm.ac.cn;yilunying@nju.edu.cn
  • Supported by:
    the Shanghai Municipal Science and Technology Major Project, China, the National Natural Science Foundation of China(32250019);the Special Fund for the Basic Scientific Research of Central Universities, China(020514380356)

关键词: 气单胞菌溶素, 单分子分析, 纳米孔道, 硫酸乙酰肝素, 金属离子

Abstract:

Heparin(HP) and heparan sulfate(HS) are highly anionic glycosaminoglycans that play essential roles in diverse biological processes through the metal ion-mediated interactions with proteins. However, direct characterization of HS-metal ion interactions at the single-molecule level in solution remains challenging. Nanopore electrochemistry is a label-free and single-molecule technique that enables direct analysis of individual molecular interactions. In this study, a T232K/K238Q Aerolysin nanopore featuring an enhanced electrostatic repelling barrier was utilized to probe the interactions between HS and different metal ions. By systematically varying the electrolyte cations(Na+, K+, and Ca2+), we have found that the metal ions significantly regulate HS translocation behavior by modulating its conformation, charge screening, and HS-nanopore interactions. Notably, in addition to Ca2+, which exhibits strong binding affinity to HS, the monovalent cations Na⁺ and K⁺ with similar physicochemical properties and weaker binding also induce distinct single-molecule signal signatures. Our results demonstrate that the nanopore-based single-molecule analysis holds strong potential to resolve the fine structural features of HS, enabling the characterization of sulfation site distributions, repeat-unit lengths, and related sequence features, and thereby providing a new avenue for high-resolution analysis of complex glycans.

Key words: Aerolysin, Single-molecule sensing, Nanopore, Heparan sulfate, Metal ion

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