CRYSTAL STRUCTURE OF ISOPENTENYL PHOSPHATE KINASE FROM M. JANNASCHII IN COMPLEX WITH IPP BETA-S TRANSFERASE, SMALL MOLECULE KINASE, ATP-BINDING, ATP GAMMA-S, METHANOCALDOCOCCUS JANNASCHII, ISOPENTENYL MONOPHOSPHATE, ISOPENTENYL DIPHOSPHATE, ISOPRENOID BIOSYNTHESIS, MEVALONATE PATHWAY, ARCHAEA 3K56