In plant biology, APS kinases (APKs) are enzymes responsible for the second step of the sulfate assimilation pathway. They catalyze the phosphorylation of into PAPS (3′-phosphoadenosine 5′-phosphosulfate). PAPS then serves as a universal sulfur donor for the synthesis of various compounds like glucosinolates, peptides, and hormones.
: It contributes to the cytosolic pool of PAPS, which is essential for the modification of secondary metabolites. In plant biology, APS kinases (APKs) are enzymes
phosphosulfate kinase is essential for Arabidopsis viability In plant biology