>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=98.43 E-value=1e-05 Score=61.41 Aligned_cols=150 Identities=20% Similarity=0.206 Sum_probs=92.5 Q ss_pred EEEEEECCCHHHHHHHHHHHHHCCC---EEEEEEEECCC--CCHHHHHHHHHHHCCCEEEEEECHHHHHHHHHHHHHHHC Q ss_conf 8999914772599999999871898---69999945787--110689999999739807998200899999879999736 Q gi|254780234|r 7 KVVLAYSGGLDTSIILKWLQVEKGL---EVIVFIADLGQ--GEELKIASDKARLLGAKEVYVKDLRREFVRDFVFPMFRA 81 (404) Q Consensus 7 kVvlaySGGLDTSv~i~~L~~e~g~---eVi~~~~d~Gq--~~d~~~~~~~A~~~Ga~~~~v~D~r~ef~~~~i~~~I~a 81 (404) T Consensus 1 ~~~vsfSGGKDS~vll~L~~~~-~~~~~~~~vvf~DTg~e~pet~~~~~~~~~~~~~~-~~~~~~~~~~~~~-~~~~--- 74 (173) T cd01713 1 NVVVSFSGGKDSTVLLHLALKA-LPELKPVPVIFLDTGYEFPETYEFVDRVAERYGLP-LVVVRPPDSPAEG-LALG--- 74 (173) T ss_pred CEEEEECCHHHHHHHHHHHHHH-CCCCCCEEEEEECCCCCCHHHHHHHHHHHHHCCCE-EEEEECCCCHHHH-HHHH--- T ss_conf 9599964649999999999996-65558837999688898989999999999873990-7999689728999-9861--- Q ss_pred CCCCCCCCCCCCCHHH-HHHHH---HHHHHHHHCCCCEEECHHHCCCCHHHHHHHHH---HHHCCCCEEEEEECCCCCCC Q ss_conf 8654787420130124-33599---99999885689287500111682156799999---98587970774410068763 Q gi|254780234|r 82 NALYEGYYLLGTAIAR-PLIAK---YLVDIANETGADAIAHGSTGKGNDQVRFELSA---YSLNSDIEIIAPWRHWSFKG 154 (404) Q Consensus 82 na~Yeg~Ypl~tslaR-plia~---~lv~~a~~~ga~~iaHG~TgkGNDQvRFe~~~---~~l~P~l~viaP~Rd~~~~s 154 (404) T Consensus 75 ----~~~~~~~~~~~~~c~~~~K~~P~~~~~~~~~~~~~~~Gi-R~~Es~~R~~~~~~~~~~~~~~~~~~~Pi~~W---t 146 (173) T cd01713 75 ----LKGFPLPSPDRRWCCRILKVEPLRRALKELGVVAWITGI-RRDESARRALLPVVWTDDGKGGILKVNPLLDW---T 146 (173) T ss_pred ----CCCCCCCCCCHHHHHHHHHHHHHHHHHHHCCCCEEEEEC-CCCCCHHHCCCCCCCCCCCCCCEEEEECHHHC---C T ss_conf ----357799832268898888078999999832982899941-21462444437623432688998999322859---9 Q ss_pred HHHHHHHHHHHCCCCC Q ss_conf 7999999997089675 Q gi|254780234|r 155 RQDLIDFAEKHAIPID 170 (404) Q Consensus 155 Re~~i~ya~~~gIpv~ 170 (404) T Consensus 147 ~~dVw~yi~~~~l~~~ 162 (173) T cd01713 147 YEDVWAYLARHGLPYN 162 (173) T ss_pred HHHHHHHHHHCCCCCC T ss_conf 9999999998399999

HHsearch alignment for GI: 254780234 and conserved domain: cd01713