D552A
mutation leads to increased formaldehyde release
H225Q
modest changes in kinetic parameters, no stabilization of FADH2-iminium charge-transfer complex
H225Q
site-directed mutagenesis, reduced catalytic activity compared to the wild-type enzyme
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complete removal of 5,10-CH2-THF synthase domain through expression of a truncated version generates a mutant enzyme unable to avoid hydrolysis of the imine species generated following amine oxidation
Y259F
able to oxidize substrate, steady-state turnover is attenuated 200fold, rate of FAD reduction is substantially impaired, no stabilization of FADH2-iminium charge-transfer complex
Y259F
site-directed mutagenesis, reduced catalytic activity compared to the wild-type enzyme