6.3.2.36 ATP + (R)-4-phosphopantoate + beta-alanine - 6.3.2.36 ATP + 4-phosphopantoate + beta-alanine the pantoate kinase/phosphopantothenate synthetase system represents the pathway for 4'-phosphopantothenate biosynthesis in Thermococcus kodakaraensis. The enzymes are necessary for CoA biosynthesis in this organism