>cd02993 PDI_a_APS_reductase PDIa family, 5'-Adenylylsulfate (APS) reductase subfamily; composed of plant-type APS reductases containing a C-terminal redox active TRX domain and an N-terminal reductase domain which is part of a superfamily that includes N type ATP PPases. APS reductase catalyzes the reduction of activated sulfate to sulfite, a key step in the biosynthesis of sulfur-containing metabolites. Sulfate is first activated by ATP sulfurylase, forming APS, which can be phosphorylated to 3'-phosphoadenosine-5'-phosphosulfate (PAPS). Depending on the organism, either APS or PAPS can be used for sulfate reduction. Prokaryotes and fungi use PAPS, whereas plants use both APS and PAPS. Since plant-type APS reductase uses glutathione (GSH) as its electron donor, the C-terminal domain may function like glutaredoxin, a GSH-dependent member of the TRX superfamily. The flow of reducing equivalents goes from GSH - C-terminal TRX domain - N-terminal reductase domain - APS. Plant-type APS red

Probab=94.05  E-value=0.032  Score=34.29  Aligned_cols=44  Identities=11%  Similarity=0.223  Sum_probs=36.5

Q ss_pred             CCCEEEEEEECCCCCCCCHHHHHHHHHHHHHHCCCCCCEEEEEEEEC
Q ss_conf             99679999604777654468888776555430244333058876514
Q gi|254780281|r   55 YIKPSIVFFGFTNCSAVCPTTLSRLDRLLKQVDPTGTLLNAYFITVD  101 (201)
Q Consensus        55 ~Gk~~li~F~~T~Cpd~Cp~~l~~l~~~~~~l~~~~~~v~~v~IsvD  101 (201)
T Consensus        20 ~~k~~lV~FYAPWCg-hCk~l~P~~~~lA~~l~~--~~v~v~~vd~d   63 (109)
T cd02993          20 RNQSTLVVLYAPWCP-FCQAMEASYEELAEKLAG--SNVKVAKFNAD   63 (109)
T ss_pred             CCCCEEEEEECCCCH-HHHHHHHHHHHHHHHHCC--CCCEEEEEECC
T ss_conf             699889999999888-888677899999998655--89789999778