共 97 条
Hysteresis as a Marker for Complex, Overlapping Landscapes in Proteins
被引:47
作者:
Andrews, Benjamin T.
[1
]
Capraro, Dominique T.
[3
]
Sukowska, Joanna I.
[4
]
Onuchic, Jose N.
[2
]
Jennings, Patricia A.
[3
]
机构:
[1] Univ Washington, Dept Med Chem, Seattle, WA 98195 USA
[2] Rice Univ, Ctr Theoret Biol Phys, Houston, TX 77005 USA
[3] Univ Calif San Diego, Dept Chem & Biochem, La Jolla, CA 92093 USA
[4] Univ Warsaw, Fac Chem, PL-02093 Warsaw, Poland
基金:
美国国家科学基金会;
关键词:
GREEN-FLUORESCENT PROTEIN;
ENERGY LANDSCAPE;
KNOTTED PROTEIN;
CIRCULAR PERMUTATION;
FOLDING MECHANISMS;
GFP;
CHROMOPHORE;
PATHWAYS;
MOLECULE;
AEQUOREA;
D O I:
10.1021/jz301893w
中图分类号:
O64 [物理化学(理论化学)、化学物理学];
学科分类号:
070304 ;
081704 ;
摘要:
Topologically complex proteins fold by multiple routes as a result of hard-to-fold regions of the proteins. Oftentimes, these regions are introduced into the protein scaffold for function and increase frustration in the otherwise smooth-funneled landscape. Interestingly, while functional regions add complexity to folding landscapes, they may also contribute to a unique behavior referred to as hysteresis. 'While hysteresis is predicted to be rare, it is observed in various proteins, including proteins containing a unique peptide cyclization to form a fluorescent chromophore as well as proteins containing a knotted topology in their native fold. Here, hysteresis is demonstrated to be a consequence of the decoupling of unfolding events from the isomerization or hula-twist of a chromophore in one protein and the untying of the knot in a second protein system. The question now is can hysteresis be a marker for the interplay of landscapes where complex folding and functional regions overlap?
引用
收藏
页码:180 / 188
页数:9
相关论文