Engineered Extrahelical Base Destabilization Enhances Sequence Discrimination of DNA Methyltransferase M.HhaI

Cytosine-specific methyltransferase HhaI, M.HhaI

MIEIKDKQLTGLRFIDLFAGLGGFRLALESCGAECVYSNEWDKYAQEVYEMNFGEKPEGDITQVNEKTIPDHDILCAGFP
CQAFSISGKQKGFEDSRGTLFFDIARIVREKKPKVVFMENVKNAASHDNGNTLEVVKNTMNELDYSFHAKVLNALDYGIP
QKRERIYMICFRNDLNIQNFQFPKPFELNTFVKDLLLPDSEVEHLVIDRKDLVMTNQEIEQTTPKTVRLGIVGKGGQGER
IYSTRGIAITLSAYGGGIFAKTGGYLVNGKTRKLHPRECARVMGYPDSYKVHPSTSQAYKQFGNSVVINVLQYIAYNIGS
SLNFKPY

20% Ammonium Sulfate, 100mM Sodium Citrate buffer, pH 6.0, hanging drop, temperature 290K

Ternary structure of WT M.HhaI C5-Cytosine DNA methyltransferase with unmodified DNA and AdoHcy

Ternary structure of HHAI methyltransferase with unmodified DNA and adhocy

Phe124Ala mutation in M.HhaI, TRANSFERASE-DNA COMPLEX