Effect of non-native helix destabilization on the folding of equine β-lactoglobulin

Autor: Masamichi Ikeguchi, Seiichi Tsukamoto, Kazuo Fujiwara, Takahiro Okabe, Toshiaki Miyajima, Kanako Nakagawa
Rok vydání: 2014
Předmět:
Zdroj: Journal of biochemistry. 156(5)
ISSN: 1756-2651
Popis: β-lactoglobulin forms a non-native α-helix during an early stage of folding. To address the role of the non-native structure in the folding process, we designed several mutants of equine β-lactoglobulin with reduced helical propensity in the non-native helix region. One of them, A123T, showed a similar structure to that of the wild-type protein; its folding kinetics was investigated by stopped-flow circular dichroism (CD) and fluorescence. Although A123T showed a reduced burst-phase CD intensity, its folding rate was similar to that of the wild-type protein, which indicated that the formation of the non-native helix does not accelerate or decelerate the folding reaction.
Databáze: OpenAIRE