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• W1992064115 abstract "SET and MYND domain-containing protein 2 (SMYD2) is a protein lysine methyltransferase that catalyzes the transfer of methyl groups from S-adenosylmethionine (AdoMet) to acceptor lysine residues on histones and other proteins. To understand the kinetic mechanism and the function of individual domains, human SMYD2 was overexpressed, purified, and characterized. Substrate specificity and product analysis studies established SMYD2 as a monomethyltransferase that prefers nonmethylated p53 peptide substrate. Steady-state kinetic and product inhibition studies showed that SMYD2 operates via a rapid equilibrium random Bi Bi mechanism at a rate of 0.048 ± 0.001 s–1, with KMs for AdoMet and the p53 peptide of 0.031 ± 0.01 μM and 0.68 ± 0.22 μM, respectively. Metal analyses revealed that SMYD2 contains three tightly bound zinc ions that are important for maintaining the structural integrity and catalytic activity of SMYD2. Catalytic activity was also shown to be dependent on the GxG motif in the S-sequence of the split SET domain, as a G18A/G20A double mutant and a sequence deletion within the conserved motif impaired AdoMet binding and significantly decreased enzymatic activity. The functional importance of other SMYD2 domains including the MYND domain, the cysteine-rich post-SET domain, and the C-terminal domain (CTD), were also investigated. Taken together, these results demonstrated the functional importance of distinct domains in the SMYD family of proteins and further advanced our understanding of the catalytic mechanism of this family." @default.
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• W1992064115 date "2011-06-29" @default.
• W1992064115 modified "2023-09-26" @default.
• W1992064115 title "Biochemical Characterization of Human SET and MYND Domain-Containing Protein 2 Methyltransferase" @default.
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• W1992064115 doi "https://doi.org/10.1021/bi200725p" @default.
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