>smart00861 Transket_pyr Transketolase, pyrimidine binding domain. Transketolase (TK) catalyzes the reversible transfer of a two-carbon ketol unit from xylulose 5-phosphate to an aldose receptor, such as ribose 5-phosphate, to form sedoheptulose 7-phosphate and glyceraldehyde 3- phosphate. This enzyme, together with transaldolase, provides a link between the glycolytic and pentose-phosphate pathways. TK requires thiamine pyrophosphate as a cofactor. In most sources where TK has been purified, it is a homodimer of approximately 70 Kd subunits. TK sequences from a variety of eukaryotic and prokaryotic sources show that the enzyme has been evolutionarily conserved. In the peroxisomes of methylotrophic yeast Hansenula polymorpha, there is a highly related enzyme, dihydroxy-acetone synthase (DHAS) (also known as formaldehyde transketolase), which exhibits a very unusual specificity by including formaldehyde amongst its substrates.

Probab=99.39 E-value=2.3e-12 Score=113.17 Aligned_cols=164 Identities=26% Similarity=0.245 Sum_probs=124.5 Q ss_pred CHHHHHHHHHHHHHC-CCEEEEECCCCCCCCCCCCEEEEEECCCCCEEEEHHHCCCCCCEEEEEECCCCCCCHHHHHHCC Q ss_conf 114789888988635-8315785010022333230279997788844556344278984599982431111013432022 Q gi|254781051|r 606 WSMAESLAFGSLCYE-GYKVRLSGQDCERGTFSHRHAILCDQETGKRYFPLGNISKDQGHCEVVNSFLSEQAVLGFEYGY 684 (957) Q Consensus 606 W~~AE~LA~~SLl~e-G~~VRlsGQD~~RGTFshRHavl~dq~t~~~y~pL~~l~~~q~~f~v~nS~LSE~avlgFEyGy 684 (957) T Consensus 2 ~r~a~~~~l~~l~~~~~~~iv~~~~Dl~~~~~~~~~~~f~~~~~~-----------~~~r--~i~~gIaE~~~vg~a~Gl 68 (168) T smart00861 2 TRKAFGEALAELAERDPERVVVSGADVGGSTGLDRGGVFPDTKGL-----------GPGR--VIDTGIAEQAMVGFAAGL 68 (168) T ss_pred HHHHHHHHHHHHHHHCCCEEEEEEHHHCCCCCCCCCCCCCCCCCC-----------CCCC--EEECCCCHHHHHHHHHHH T ss_conf 189999999999856997199983674887577536610444456-----------9987--564483789999987599 Q ss_pred CCCCCCCCEEECCCCCCCCCCCHHHHHHHHHHHHHHHCCCCCCEEECCCCCCCC-CCCCCCCCHH-HHHHHCCCCCEEEE Q ss_conf 113865311100002442454102256554202576233368135436888888-8765644057-88752143782697 Q gi|254781051|r 685 SLNNLNALTIWEAQFGDFANGAQVILDQFITAGEQKWLCTSNLVCLLPHGYEGQ-GPEHSSARLE-RFLQMCAENNMYVA 762 (957) Q Consensus 685 s~~~p~~L~iWEAQFGDF~NgAQviiDqfiss~e~KW~~~sglvllLPHGyeGq-GPEHSSaRlE-RfLQl~a~~N~~V~ 762 (957) T Consensus 69 A~~G---~~pi~~~~~~f~~~a~~qi~~~~~~---~--~~~~v~~~~~~~~~g~~G~tH~s~~~~~~~~~ip---~~~v~ 137 (168) T smart00861 69 ALAG---LRPVVAIFFTFFDRAKDQIRSDGAM---G--RVPVVVRHDSGGGVGEDGPTHHSQEDEALLRAIP---GLKVV 137 (168) T ss_pred HHCC---CCCCCCHHHHHHHHHHHHHHHHHHC---C--CCCEEEEEECEEEECCCCCHHCCCCHHHHHHHCC---CCEEE T ss_conf 8759---9642102357887589999865340---6--6773788601005668864110444388886179---97899 Q ss_pred ECCCHHHHHHHHHHHHCCCCCCCEEEECCCH Q ss_conf 2488999999999974353488689856602 Q gi|254781051|r 763 NCTSPANYFHILRRQIYDRSSRPLIMMAPKS 793 (957) Q Consensus 763 ~~ttpAq~FH~LRRQ~~r~~rkPLiv~tPKs 793 (957) T Consensus 138 ~P~~~~e~~~~l~~a~~~~~~p~~i~l~~~~ 168 (168) T smart00861 138 APSDPAEAKGLLRAAIRRDDGPPVIRLERKS 168 (168) T ss_pred EECCHHHHHHHHHHHHHCCCCCEEEEECCCC T ss_conf 7099999999999998488998899973899

HHsearch alignment for GI: 254781051 and conserved domain: smart00861