This domain is the catalytic domain of ATP-sulfurylase or sulfate adenylyltransferase EC:2.7.7.4 some of which are part of a bifunctional polypeptide chain associated with adenosyl phosphosulphate (APS) kinase Pfam:PF01583. Both enzymes are required for PAPS (phosphoadenosine-phosphosulfate) synthesis from inorganic sulphate [2]. ATP sulfurylase catalyses the synthesis of adenosine-phosphosulfate APS from ATP and inorganic sulphate [1].

1: A member of a family of sulfate-activating enzymes causes murine brachymorphism [published erratum appears in Proc Natl Acad Sci U S A 1998 Sep 29;95(20):12071] Kurima K, Warman ML, Krishnan S, Domowicz M, Krueger RC Jr, Deyrup A, Schwartz NB; Proc Natl Acad Sci U S A 1998;95:8681-8685. PMID:9671738

2: A multifunctional Urechis caupo protein, PAPS synthetase, has both ATP sulfurylase and APS kinase activities. Rosenthal E, Leustek T; Gene 1995;165:243-248. PMID:8522184