Protein Family Models

This domain is found in phosphoadenosine phosphosulfate (PAPS) reductase enzymes or PAPS sulfotransferase. PAPS reductase is part of the adenine nucleotide alpha hydrolases superfamily also including N type ATP PPases and ATP sulphurylases [1]. The enzyme uses thioredoxin as an electron donor for the reduction of PAPS to phospho-adenosine-phosphate (PAP) [1,2]. It is also found in NodP nodulation protein P from Rhizobium which has ATP sulfurylase activity (sulfate adenylate transferase) [3]. [1]. 9261082. Crystal structure of phosphoadenylyl sulphate (PAPS) reductase:. a new family of adenine nucleotide alpha hydrolases.. Savage H, Montoya G, Svensson C, Schwenn JD, Sinning I;. Structure 1997;5:895-906.. [2]. 7588765. Reaction mechanism of thioredoxin: 3'-phospho-adenylylsulfate. reductase investigated by site-directed mutagenesis.. Berendt U, Haverkamp T, Prior A, Schwenn JD;. Eur J Biochem 1995;233:347-356.. [3]. 2250719. ATP sulphurylase activity of the nodP and nodQ gene products of. Rhizobium meliloti.. Schwedock J, Long SR;. Nature 1990;348:644-647. (from Pfam)

Date:

2024-04-03

With CysN catalyzes the formation of adenylylsulfate from sulfate and ATP

Gene:

cysD

Date:

2020-10-26

Metabolic assimilation of sulfur from inorganic sulfate, requires sulfate activation by coupling to a nucleoside, for the production of high-energy nucleoside phosphosulfates. This pathway appears to be similar in all prokaryotic organisms. Activation is first achieved through sulfation of sulfate with ATP by sulfate adenylyltransferase (ATP sulfurylase) to produce 5'-phosphosulfate (APS), coupled by GTP hydrolysis. Subsequently, APS is phosphorylated by an APS kinase to produce 3'-phosphoadenosine-5'-phosphosulfate (PAPS) [1]. In Escherichia coli, ATP sulfurylase is a heterodimer composed of two subunits encoded by cysD and cysN, with APS kinase encoded by cysC. These genes are located in a unidirectionally transcribed gene cluster, and have been shown to be required for the synthesis of sulfur-containing amino acids [1]. Homologous to this E.coli activation pathway are nodPQH gene products found among members of the Rhizobiaceae family. These gene products have been shown to exhibit ATP sulfurase and APS kinase activity, yet are involved in Nod factor sulfation, and sulfation of other macromolecules [2].

Gene:

cysD

Date:

2021-04-27

sulfate adenylyltransferase subunit CysD (subunit 2) is the small subunit that with CysN, forms the ATP sulfurylase (ATPS) that catalyzes the conversion of ATP and sulfate to diphosphate and adenylyl sulfate

Date:

2023-03-13