The Bin3 domain contains a tripartite S-adenosyl-L-methionine (SAM) binding
motif with all three sequence motifs, I/Ia, II, and III . It is found in
the following proteins:
Drosophila melanogaster probable methyltransferase Bin3 (EC 2.1.1.-). It
interacts with bicoid/bcd.
Human 7SK snRNA methylphosphate capping enzyme (MePCE) (EC 2.1.1.-) or
Bicoid-interacting protein 3 homolog (Bin3 homolog), a S-adenosyl-L-
methionine-dependent methyltransferase that adds a methylphosphate cap at
the 5'-end of 7SK snRNA, leading to stabilize it.
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