Rational design of analyte channels of the green fluorescent protein for biosensor applications.

ABSTRACT: A novel solvent-exposed analyte channel, generated by F165G substitution, on the surface of green fluorescent protein (designated His(6)GFPuv/F165G) was successfully discovered by the aid of molecular modeling software (PyMOL) in conjunction with site-directed mutagenesis. Regarding the high predictive performance of PyMOL, two pore-containing mutants namely His(6)GFPuv/H148G and His(6)GFPuv/H148G/F165G were also revealed. The pore sizes of F165G, H148G, and the double mutant H148G/F165G were in the order of 4, 4.5 and 5.5 A, respectively. These mutants were subjected to further investigation on the effect of small analytes (e.g. metal ions and hydrogen peroxide) as elucidated by fluorescence quenching experiments. Results revealed that the F165G mutant exhibited the highest metal sensitiv

SUBMITTER: Tansila N 

PROVIDER: S-EPMC2096736 | biostudies-literature | 2007 Nov

REPOSITORIES: biostudies-literature