ID 2.7.1.169 DE pantoate kinase. CA (R)-pantoate + ATP = (R)-4-phosphopantoate + ADP + H(+). CC -!- The conversion of (R)-pantoate to (R)-4'-phosphopantothenate is part CC of the pathway leading to biosynthesis of 4'-phosphopantetheine, CC an essential cofactor of coenzyme A and acyl-carrier protein. CC -!- In bacteria and eukaryotes this conversion is performed by CC condensation with beta-alanine, followed by phosphorylation CC (EC 6.3.2.1 and EC 2.7.1.33, respectively). CC -!- In archaea the order of these two steps is reversed, CC and phosphorylation precedes condensation with beta-alanine. DR Q2FUB2, POK_METHJ ; Q58379, POK_METJA ; Q5JHF1, POK_THEKO ; //