The flexible conformations of Uro'gen III Synthase.

The active site of the 5N-Gln Methyltransferase involved in Ribosomal Release Factor methylation, a crucial step in proper efficiency of amino-peptide release from the ribosome. The electron density maps prove the presence of a partially methylated gln reside in the active site, the S-adenosylmethionine/Homocystein substrate is in yellow, protein in green.