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SET domains common structural features


A unique fold of a core of 10-12 𝞫 strands, a region that bisects the SET domain, referred to as the iSET, which contributes to substrate recognition, and extended loops.

The SET domain is flanked by two heterologous regions at its N- and C-terminus, referred to as nSET and cSET. The cSET contains conserved residues that are important for substrate binding and for catalysis.

The cSET region folds back onto the SET domain threading through a loop formed by a preceding stretch of the sequence to create a "pseudoknot".

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Preparation, Biochemical Analysis and Structure Determination of SET Domain Histone Methyltransferases
E. Bergamin, J.F. Couture
Methods in Enzymology (Science Direct)

1O9S (PDB)