>cd01713 PAPS_reductase This domain is found in phosphoadenosine phosphosulphate (PAPS) reductase enzymes or PAPS sulphotransferase. PAPS reductase is part of the adenine nucleotide alpha hydrolases superfamily also including N type ATP PPases and ATP sulphurylases. A highly modified version of the P loop, the fingerprint peptide of mononucleotide-binding proteins, is present in the active site of the protein, which appears to be a positively charged cleft containing a number of conserved arginine and lysine residues. Although PAPS reductase has no ATPase activity, it shows a striking similarity to the structure of the ATP pyrophosphatase (ATP PPase) domain of GMP synthetase, indicating that both enzyme families have evolved from a common ancestral nucleotide-binding fold. The enzyme uses thioredoxin as an electron donor for the reduction of PAPS to phospho-adenosine-phosphate (PAP) . It is also found in NodP nodulation protein P from Rhizobium meliloti which has ATP sulphurylase acti

Probab=98.65 E-value=7.4e-07 Score=69.60 Aligned_cols=156 Identities=24% Similarity=0.186 Sum_probs=100.1 Q ss_pred EEEEEECCCHHHHHHHHHHHHCCC---EEEEEEEECCCCCCCCCCCCCCCCHHHHHHHHHHHHHCCCCEEECCHHHHHHH Q ss_conf 899996098579999999988698---49999987047876655557788189999999999980995898170788663 Q gi|254780151|r 22 RVVVAMSGGVDSSVVAALLKRDGY---DVIGVTLQLYNSRKASKRKGSCCAGQDVYDARRVCDTINVSHYVFDYEERFRN 98 (408) Q Consensus 22 kV~va~SGGVDSsvaa~lL~~~G~---~V~g~~m~~~~~~~~~~~~~~c~~~~d~~~a~~va~~LgI~~~~~d~~~~f~~ 98 (408) T Consensus 1 ~~~vsfSGGKDS~vll~L~~~~~~~~~~~~vvf~DT---g~--------e~pet~~~~~~~~~~~~~~~~~~~~~~~~~~ 69 (173) T cd01713 1 NVVVSFSGGKDSTVLLHLALKALPELKPVPVIFLDT---GY--------EFPETYEFVDRVAERYGLPLVVVRPPDSPAE 69 (173) T ss_pred CEEEEECCHHHHHHHHHHHHHHCCCCCCEEEEEECC---CC--------CCHHHHHHHHHHHHHCCCEEEEEECCCCHHH T ss_conf 959996464999999999999665558837999688---89--------8989999999999873990799968972899 Q ss_pred HCCCCCHHHHHCCCCCCCEE-CCCCEEEHHHHHHHHCCCCCCEECCCCCCCEEEECCCCCCCEEEEEEC-CCCCCCCEEE Q ss_conf 22441126787088612000-015411058888874016876452253110254126787731688531-5787873189 Q gi|254780151|r 99 AVIVPFASSYAAGETPLPCV-DCNRTVKFSDLLSVTRQLGADVLATGHYIRSRLYVGDDGKRRRIMCRP-MDLERDQSYF 176 (408) Q Consensus 99 ~V~~~~~~~y~~G~TPNPc~-~CN~~iKF~~l~~~a~~~g~~~iATGHYar~~~~~~~~~~~~~~L~r~-~D~~KDQSYf 176 (408) T Consensus 70 ~~~----~~~~~~~~~~~~~~~c~~~~K~~P~~~~~~~~~~~~~~~G----iR~---~Es~~R~~~~~~~~~~~~~~--- 135 (173) T cd01713 70 GLA----LGLKGFPLPSPDRRWCCRILKVEPLRRALKELGVVAWITG----IRR---DESARRALLPVVWTDDGKGG--- 135 (173) T ss_pred HHH----HHCCCCCCCCCCHHHHHHHHHHHHHHHHHHHCCCCEEEEE----CCC---CCCHHHCCCCCCCCCCCCCC--- T ss_conf 998----6135779983226889888807899999983298289994----121---46244443762343268899--- Q ss_pred EEEECCHHHCEEECCCCCCCHHHHHHHHHHCCCCC Q ss_conf 86302022100334256899789899997412543 Q gi|254780151|r 177 LFATTQQQLCDLRFPLGDMKKESVRDLAREMGLDI 211 (408) Q Consensus 177 L~~l~~~~L~~~~FPlg~~~K~eVR~~A~~~gl~~ 211 (408) T Consensus 136 -------~--~~~~Pi~~Wt~~dVw~yi~~~~l~~ 161 (173) T cd01713 136 -------I--LKVNPLLDWTYEDVWAYLARHGLPY 161 (173) T ss_pred -------E--EEEECHHHCCHHHHHHHHHHCCCCC T ss_conf -------8--9993228599999999999839999

HHsearch alignment for GI: 254780151 and conserved domain: cd01713