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EC Number
Protein Variants
Commentary
Reference
2.1.1.228
A202S
Km/Vmax for tRNA is 2fold higher than wild-type value
712737
2.1.1.228
A25S
Km/Vmax for tRNA is 2.9fold higher than wild-type value
712737
2.1.1.228
A70S
Km/Vmax for tRNA is 4fold higher than wild-type value
712737
2.1.1.228
C112A
Km/Vmax for tRNA is 7.6fold higher than wild-type value
712737
2.1.1.228
C20S
the C20S mutant protein forms a dimer structure even though it is missing the Cys20Cys20 disulfide bond between its two subunits. Incubation at 85°C for 20 min causes the precipitation of more than half of the C20S protein, while more than 70% of the wild-type enzyme is soluble at that temperature. Methyl-transfer activity of the C20S mutant protein is slightly less than that of the wild-type enzyme at 70°C. Comparison of the CD-spectra of wild-type and C20S proteins reveals that some of the alpha-helices in the C20S mutant protein are less tightly packed than the alpha-helices of the wild-type enzyme at 70°C
712103
2.1.1.228
C301S/C308S/C326S
site-directed mutagenesis
758376
2.1.1.228
D119A
inactive mutant enzyme
712737
2.1.1.228
D128A
inactive mutant enzyme
712737
2.1.1.228
D135A
inactive mutant enzyme
712737
2.1.1.228
D169A
inactive mutant enzyme
712737
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