Hydrophobic Moieties Bestow Fast-Folding and Hyperstability on Collagen Triple Helices
作者:Jasmine Egli、Christiane Siebler、Martin Köhler、Renato Zenobi、Helma Wennemers
DOI:10.1021/jacs.8b13871
日期:2019.4.10
rate of collagen, the most abundant protein in mammals. Here, we explored the effect of pendant hydrophobic moieties on the folding and stability of collagen triple helices. Kinetic studies with a series of collagen model peptides showed that a local hydrophobic environment accelerates cis- trans isomerization to an extent that thermally induced unfolding and folding of the collagen triple helix take
Xaa-Pro 键的反式酰胺键和快速顺反异构化对胶原蛋白的稳定性和折叠率至关重要,胶原蛋白是哺乳动物中含量最高的蛋白质。在这里,我们探索了悬垂的疏水部分对胶原三螺旋折叠和稳定性的影响。对一系列胶原蛋白模型肽的动力学研究表明,局部疏水环境加速顺反异构化到一定程度,即热诱导的胶原蛋白三螺旋展开和折叠以相同的速度发生。热变性研究表明,疏水性附属物提供超稳定的胶原三螺旋(Tm = 70 °C)。