Understanding of the molecular relationships in carbohydrate-protein interactions provides useful information on biological processes in living organisms and is also helpful for development of potent biomedical agents. To analyze their interaction, first, we modified diverse carbohydrate containing thiol group that was directly immobilized on gold cantilever and electrode. Herein, as the method to characterize interactive formation and binding specificity, we used atomic force microscopy (AFM) and electrochemical detection system. As measuring unbinding force from GM1-Vibrio cholera toxin as well as the analogue analyses, we understood how structural and binding positional differences in complex carbohydrate affect the interaction with protein and surmise that the GM1-ctxAB complex makes a “two-finger grip” formation through the conformational change of a flexible carbohydrate. In addition, we found that a potential shift at the maximum current occurred upon interaction with cholera toxin proteins through electrochemical detection system. By comparing results for different sizes of GM1 analogues, we surmise that the potential shift is closely associated with the specificity for the carbohydrate-protein interaction. In conclusion, using AFM force analysis, we successfully quantified and characterized the interactive configuration of carbohydrate-protein molecules and a carbohydrate-based electrochemical system could be used a tool for specific carbohydrate-protein interaction.
목차
1. 학력 2. 경력 3. 주요 연구분야/공동연구 가능분야 4. 대표 논문/특허 Characterization of carbohydrate-protein interaction:Interactive configuration and specificity Acknowledgement Reference
저자
서정현 [ Jeong Hyun Seo | 포항공과대학교 화학공학과, 연구 조교수 ]
Chang Sup Kim [ Department of Chemical Engineering, POSTECH (Pohang University of Science and Technology), Pohang 790-784, South Korea ]
Hyung Joon Cha [ Department of Chemical Engineering, POSTECH (Pohang University of Science and Technology), Pohang 790-784, South Korea ]
본 학회는 화학, 생화학, 분자생물학, 미생물학, 식품공학, 의학, 약학, 유전공학 및 생물공학, 환경 및 기타 공업 등 전 분야의 탄수화물관련 이론과 기술을 연구 발전시키고 산학협동을 통해 이를 보급하여 국내 관련 산업의 발전 및 국민생활의 과학화에 기여하고자 하며, 이러한 목표와 비젼의 실현을 위해 회원들이 적극적인 참여와 활동을 전개하고자 한다.