>cd02885 IPP_Isomerase Isopentenyl diphosphate (IPP) isomerase, a member of the Nudix hydrolase superfamily, is a key enzyme in the isoprenoid biosynthetic pathway. Isoprenoids comprise a large family of natural products including sterols, carotenoids, dolichols and prenylated proteins. These compounds are synthesized from two precursors: isopentenyl diphosphate (IPP) and dimethylallyl diphosphate (DMAPP). IPP isomerase catalyzes the interconversion of IPP and DMAPP by a stereoselective antarafacial transposition of hydrogen. The enzyme requires one Mn2+ or Mg2+ ion in its active site to fold into an active conformation and also contains the Nudix motif, a highly conserved 23-residue block (GX5EX7REUXEEXGU, where U = I, L or V), that functions as a metal binding and catalytic site. The metal binding site is present within the active site and plays structural and catalytical roles. IPP isomerase is well represented in several bacteria, archaebacteria and eukaryotes, including fungi, mamm

Probab=99.77 E-value=3.9e-18 Score=126.03 Aligned_cols=120 Identities=26% Similarity=0.348 Sum_probs=81.1 Q ss_pred CCCCEEEEEEECCCCCEEEEEECCCCCCCCCCCCCC-CCCCCCCCCCHHHHHHHHHHHHHCCCCCCCCCCCCCCEEECCC Q ss_conf 956606999984898399999268877666872201-2115078888889999999998375522222013661241163 Q gi|254780557|r 1 MYRRGVGILILNQDDLVWVGRRCFHDNNKHLSLWQM-PQGGINPQEDPLDAAYRELYEETGIKSISLLGQGDSYIQYDFP 79 (160) Q Consensus 1 ~yR~~V~vvi~n~~~~iLl~kR~~~~~~~~~g~W~~-PgG~ve~gEt~~~Aa~REl~EEtGi~~~~~~~~~~~~~~~~~~ 79 (160) T Consensus 28 l~Hrav~v~v~n~~g~lllqkRs~~K-~~~Pg~wd~s~~Gh~~~GE~~~~aa~Rel~EElGi~~~~~~~~~-~~~~y~~~ 105 (165) T cd02885 28 LLHRAFSVFLFNSKGRLLLQRRALSK-YTFPGLWTNTCCSHPLPGEGVKDAAQRRLREELGITGDLLELVL-PRFRYRAP 105 (165) T ss_pred CEEEEEEEEEECCCCCEEEEEECCCC-CCCCCEEECCCCCCCCCCCCHHHHHHHHHHHHHCCCCCCCCEEE-EEEEEECC T ss_conf 34899999999089979999857988-68997073554346769975899999988886199854320466-68999322 Q ss_pred CCCCCCCCCCCC-CCEEEEEEECCCCCCEECCCCCCCCCCCCCEEEECCHHHHHHCC Q ss_conf 222000011234-43379999804754301057888888860037603789976300 Q gi|254780557|r 80 AHCIQENGYVGQ-MQKWFAFRFQGLTSEICVDRTAYGYESEFDAWTWVSLWDTPNIV 135 (160) Q Consensus 80 ~~~~~~~~~~~~-~~~~~~~~~~~~~~~i~~~~~~~~~~~E~~~~~Wv~~~el~~~i 135 (160) T Consensus 106 ~~----~~~~e~E~~~vy~~~~d~---~~------~~~~~EV~~~~w~~~~el~~~i 149 (165) T cd02885 106 DD----GGLVEHEIDHVFFARADV---TL------IPNPDEVSEYRWVSLEDLKELV 149 (165) T ss_pred CC----CCCCCEEEEEEEEEEECC---CC------CCCHHHHEEEEEECHHHHHHHH T ss_conf 48----987423799999996589---87------6995792388997899999999

HHsearch alignment for GI: 254780557 and conserved domain: cd02885