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 ...
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].
Requiring thioredoxin as an electron donor, phosphoadenosine phosphosulphate reductase (CysH) catalyses the reduction of phosphoadenosine phosphosulphate (PAPS) to sulphite and phosphoadenosine phosphate (PAP). It is part of the pathway that synthesises sulfite from sulfate. This pathway for introducing sulfur into biological molecules which utilises phosphoadenylyl reductase is only present in prototrophic organsisms.
