Involved in the biosynthesis of the antifungal agent validamycin A. Catalyzes the phosphorylation of valienone and validone to their 7-phosphate derivatives. ATP + valienone = ADP + H(+) + valienone 7-phosphate ATP + validone = ADP + H(+) + validone 7-phosphate kcat is 7.3 sec(-1) for validone as substrate. kcat is 3.5 sec(-1) for valienone as substrate. Cells lacking this gene are unable to procduce validamycin A. Belongs to the ROK (NagC/XylR) family.