Protein

Further thermo‐stabilization of thermophilic rhodopsin from Thermus thermophilus JL‐18 through engineering in extramembrane regions

1 month ago   |   By Wiley

Abstract
It is known that a hyperthermostable protein tolerable at temperatures over 100°C can be designed from a soluble globular protein by introducing mutations. To expand the applicability of this technology to membrane proteins, here we report a further thermo‐stabilization of the thermophilic rhodopsin from Thermus thermophilus JL‐18 as a model membrane protein. Ten single mutations in the extramembrane regions were designed based on a computational prediction of folding free‐energy differences upon mutation. Experimental characterizations using the UV‐visible spectroscopy and the...
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