alyVI is a gene which encodesan alginate lyase of marine bacterium Vibrio sp. QY101 (338aa). A nine-amino-acid consensus region (YXRESLREM), which was only found in poly-G lyases, was also observed in the amino-terminal region of alyVI. However, alyVI could degrade both M block and G block. A1-II’ is a close homolog with a reported structure (2CWS). A 3D structure of this enzyme was modeled based on this template by the comparative modeling technique. As in the template alginate, tyrosine seems critical for enzymatic activity. Since it shows enzymatic activity for poly-M alginate, docking a tri-mannuronate as well as a tri-guluronate into the enzyme was performed. The ligand was nicely posed inside of the each binding site with a strikingly similar way. In accordance with previous report, OH-group of a tyrosine is close to -hydrogen, suitable to initiate -elimination reaction. By considering both ligands, it can be designed to change stereoselectivity of this enzyme to either M-specific or G-specific in a rational way.
키워드
Homology ModelingDockingAlginate LyasealyVI
저자
Hoon Cho [ College of Engineering, Chosun University ]
Seung Joo Cho [ College of Medicine, Chosun University ]
한국생물공학회 [The Korean Society for Biotechnology and Bioengineering]
설립연도
1984
분야
공학>생물공학
소개
이 법인은 생물 공학의 발전과 보급에 이바지하고, 회원 상호 간의 연구 협력과 친목을 도모함을 목적으로 한다
1. 생물공학 분야의 발전을 위한 연구 협력
2. 생물공학의 실용화를 촉진시키기 위한 산학 협동
3. 학술연구 발표회, 강연회, 연수회 등 학술활동의 개최
4. 국,영문 학술지,소식지,학술회의 Proceedings 및 학술도서의 발간
5. 생물공학 발전을 위한 정책 건의
6. 기타 국제 교류 등 본 학회의 목적 달성을 위한 제반 활동