HHsearch alignment for GI: 254780546 and conserved domain: cd01713

>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=99.15  E-value=6.1e-10  Score=89.34  Aligned_cols=149  Identities=19%  Similarity=0.201  Sum_probs=91.2

Q ss_pred             EEEEEECCCHHHHHHHHHHHHHHHHCCCCCEEEEEEEECCCCCCCHHHHHHHHHHHHHHCCCCEEEEEEECCC-------
Q ss_conf             3999966942489999999999986489972999999667798784689999999998718988999975047-------
Q gi|254780546|r   21 HILVAVSGGSDSMGLLIALHSVLSDRSFGKIKFSAISVDHCLRETAKDEVRYVSDVCSRLRIAHSVVSWKNSK-------   93 (423)
Q Consensus        21 ~i~vAvSGG~DS~aLl~ll~~~~~~~~~~~~~l~a~~vdHglr~~s~~e~~~v~~~~~~lgi~~~~~~~~~~~-------   93 (423)
T Consensus         1 ~~~vsfSGGKDS~vll~L~~~~~~~~----~~~~vvf~DTg~--e~pet~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~   74 (173)
T cd01713           1 NVVVSFSGGKDSTVLLHLALKALPEL----KPVPVIFLDTGY--EFPETYEFVDRVAERYGLPLVVVRPPDSPAEGLALG   74 (173)
T ss_pred             CEEEEECCHHHHHHHHHHHHHHCCCC----CCEEEEEECCCC--CCHHHHHHHHHHHHHCCCEEEEEECCCCHHHHHHHH
T ss_conf             95999646499999999999966555----883799968889--898999999999987399079996897289999861


Q ss_pred             -CCCCCHHHH-----HHHHHHHHHHHCCCCCCCCHHHHHHHHHHHHHHHHHHHCCCCCCCCCCCCCCCCCCCCCCCEEEC
Q ss_conf             -877803788-----85455554320012344201234566656689999862365444332235764100357968710
Q gi|254780546|r   94 -PQTGLMAAA-----REARYALISEHAKTINATLIMTAHTFDDQLETVYMRSQRDYAEKGMGLSGMCDTILYDLNLWISR  167 (423)
Q Consensus        94 -~~~~~~~~a-----r~~r~~~~~~~~~~~~~~~l~~ah~~dD~~Et~l~rl~r~sg~~g~~l~~~~~~~~~~~~~~i~R  167 (423)
T Consensus        75 ~~~~~~~~~~~~~c~~~~K~~P~~~~~~~~~~~~~~~GiR~~Es~~R~~~--------------~~~~~~~~~~~~~~~~  140 (173)
T cd01713          75 LKGFPLPSPDRRWCCRILKVEPLRRALKELGVVAWITGIRRDESARRALL--------------PVVWTDDGKGGILKVN  140 (173)
T ss_pred             CCCCCCCCCCHHHHHHHHHHHHHHHHHHHCCCCEEEEECCCCCCHHHCCC--------------CCCCCCCCCCCEEEEE
T ss_conf             35779983226889888807899999983298289994121462444437--------------6234326889989993


Q ss_pred             CHHCCCHHHHHHHHHHHCCCCC
Q ss_conf             1210428999998998189320
Q gi|254780546|r  168 PFLRCRREDIRSFLLQRNISWC  189 (423)
Q Consensus       168 PLL~~~r~~l~~~~~~~~i~wv  189 (423)
T Consensus       141 Pi~~Wt~~dVw~yi~~~~l~~~  162 (173)
T cd01713         141 PLLDWTYEDVWAYLARHGLPYN  162 (173)
T ss_pred             CHHHCCHHHHHHHHHHCCCCCC
T ss_conf             2285999999999998399999