RNA METHYLTRANSFERASE, RSME, METHYLTRANSFERASE, RRNA MODIFICATION, PUA DOMAIN, M3U, SAM, STRUCTURAL GENOMICS, NPPSFA, NATIONAL PROJECT ON PROTEIN STRUCTURAL AND FUNCTIONAL ANALYSES, RIKEN STRUCTURAL GENOMICS/PROTEOMICS INITIATIVE, RSGI 2EGV CRYSTAL STRUCTURE OF RRNA METHYLTRANSFERASE WITH SAM LIGAND