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Curr Opin Struct Biol. 2002 Dec;12(6):783-93.

SAM (dependent) I AM: the S-adenosylmethionine-dependent methyltransferase fold.

Author information

  • 1Centre for Drug Design and Development, and Special Research Centre for Functional and Applied Genomics, Institute for Molecular Bioscience, University of Queensland, Brisbane QLD 4072, Australia. J.Martin@imb.uq.edu.au

Erratum in

  • Curr Opin Struct Biol. 2003 Feb;13(1):142.


The S-adenosylmethionine-dependent methyltransferase enzymes share little sequence identity, but incorporate a highly conserved structural fold. Surprisingly, residues that bind the common cofactor are poorly conserved, although the binding site is localised to the same region of the fold. The substrate-binding region of the fold varies enormously. Over the past two years, there has been a significant increase in the number of structures that are known to incorporate this fold, including several uncharacterized proteins and two proteins that lack methyltransferase activity.

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