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