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Information on EC 2.7.7.4 - sulfate adenylyltransferase

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EC Tree
     2 Transferases
         2.7 Transferring phosphorus-containing groups
             2.7.7 Nucleotidyltransferases
                2.7.7.4 sulfate adenylyltransferase
IUBMB Comments
The human phosphoadenosine-phosphosulfate synthase (PAPS) system is a bifunctional enzyme (fusion product of two catalytic activities). In a first step, sulfate adenylyltransferase catalyses the formation of adenosine 5'-phosphosulfate (APS) from ATP and inorganic sulfate. The second step is catalysed by the adenylylsulfate kinase portion of 3'-phosphoadenosine 5'-phosphosulfate (PAPS) synthase, which involves the formation of PAPS from enzyme-bound APS and ATP. In contrast, in bacteria, yeast, fungi and plants, the formation of PAPS is carried out by two individual polypeptides, sulfate adenylyltransferase (EC 2.7.7.4) and adenylyl-sulfate kinase (EC 2.7.1.25).
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Word Map
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The enzyme appears in viruses and cellular organisms
Synonyms
atps, atp sulfurylase, papss2, atp-sulfurylase, sulfurylase, atp sulphurylase, sulfate adenylyltransferase, atps2, atps1, atp-s, more
REACTION
REACTION DIAGRAM
COMMENTARY hide
ORGANISM
UNIPROT
LITERATURE
ATP + sulfate = diphosphate + adenylyl sulfate
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