>cd00003 PNPsynthase Pyridoxine 5'-phosphate (PNP) synthase domain; pyridoxal 5'-phosphate is the active form of vitamin B6 that acts as an essential, ubiquitous coenzyme in amino acid metabolism. In bacteria, formation of pyridoxine 5'-phosphate is a step in the biosynthesis of vitamin B6. PNP synthase, a homooctameric enzyme, catalyzes the final step in PNP biosynthesis, the condensation of 1-amino-acetone 3-phosphate and 1-deoxy-D-xylulose 5-phosphate. PNP synthase adopts a TIM barrel topology, intersubunit contacts are mediated by three ''extra'' helices, generating a tetramer of symmetric dimers with shared active sites; the open state has been proposed to accept substrates and to release products, while most of the catalytic events are likely to occur in the closed state; a hydrophilic channel running through the center of the barrel was identified as the essential structural feature that enables PNP synthase to release water molecules produced during the reaction from the closed,

Probab=100.00 E-value=0 Score=716.01 Aligned_cols=234 Identities=38% Similarity=0.632 Sum_probs=225.9 Q ss_pred CCCCCCHHHHHHHHCCCCCCCCHHHHHHHHHHCCCCEEEEECCCCCCCCCHHHHHHHHHHHCCCCCCCEEEEEECCCHHH Q ss_conf 53322144322322078868998999999997499899982478833488899999887400013674158883485689 Q gi|254780438|r 4 SVSVNLNAVAVLRNRRNLPWPNLVHIGKIALQSGASGLTVHPRPDQRHIRYTDLPEIRRLIDEQFPKAELNIEGYPNETF 83 (261) Q Consensus 4 ~LsVNidhiAtLRnaRg~~~P~~~~~a~~~~~~GadgITvH~R~DrRHI~~~Dv~~l~~~~~~~~~~~elNiEg~p~~e~ 83 (261) T Consensus 1 kL~VNidhiAtlRnaRg~~~Pd~~~~a~~~~~~GadgITvHlR~DrRHI~~~Dv~~l~~~~-----~~~lNlE~a~~~em 75 (234) T cd00003 1 RLGVNIDHVATLRNARGTNYPDPVEAALLAEKAGADGITVHLREDRRHIQDRDVRLLRELV-----RTELNLEMAPTEEM 75 (234) T ss_pred CCCEECCCEEEHHHCCCCCCCCHHHHHHHHHHCCCCEEEECCCCCCCCCCCHHHHHHHHHC-----CCCEEECCCCCHHH T ss_conf 9745201010023148999999999999999839985895248876667545799999865-----85546612793899 Q ss_pred HHHHHHHCCCEEEEEECCCCCCCCCCCCCHHHHHHHHHHHHHHHCCCCCEEEEEECCCCCCHHHHHHHHCCCCEEEECCC Q ss_conf 99998507212897101655533357822133378899999862026963899725444414799997406614651121 Q gi|254780438|r 84 LNLCERYKPEQITLVPDDPHQLTSDHGWDFLQNQALLTKTVARLHNLGSRISLFADGNGNEHSLQAAKLTGADCIELYTG 163 (261) Q Consensus 84 i~ia~~ikP~qvtLVPe~r~elTTegGldv~~~~~~L~~~i~~l~~~girvSLFIDpd~~q~~i~~a~~~Gad~VElhTG 163 (261) T Consensus 76 i~ia~~~kP~~vtLVPe~r~elTTegGld~~~~~~~L~~~i~~lk~~~IrvSLFIDPd~~q--i~~a~~~Gad~VElhTG 153 (234) T cd00003 76 LEIALEVKPHQVTLVPEKREELTTEGGLDVAGQAEKLKPIIERLKDAGIRVSLFIDPDPEQ--IEAAKEVGADRVELHTG 153 (234) T ss_pred HHHHHHCCCCEEEECCCCCCCCCCCCCCCCCCHHHHHHHHHHHHHHCCCEEEEEECCCHHH--HHHHHHHCCCEEEEECH T ss_conf 9999984998789878887864178892665478899999999986598279972798789--99999849399998247 Q ss_pred CCHHHHHHHHHHHHHHHHHHHHHHHHHHCCCEEEECCCCCHHHHHHHHHHCCCCEEEEEHHHHHHHHHHHHHHHHHHHHH Q ss_conf 11024443564336668899987665415623520789898779999973699638842599999999940999999999 Q gi|254780438|r 164 PYGACYNNPQQERIFLNKLAITAQLAQKMDLQINAGHDLTIQNIPNLINAIPYISEISVGHAFAATALECGVKEAVFCFR 243 (261) Q Consensus 164 ~Ya~a~~~~~~~~~el~~i~~aa~~A~~lgL~VnAGHgLn~~Nl~~~i~~Ip~I~EvsIGHaiIseAl~~GL~~aI~~~~ 243 (261) T Consensus 154 ~Ya~a~~~~~-~~~el~~i~~aa~~A~~lGL~VnAGHgLn~~Nl~~i-~~ip~i~EvnIGHaiI~esl~~Gl~~aV~~~~ 231 (234) T cd00003 154 PYANAYDKAE-REAELERIAKAAKLARELGLGVNAGHGLNYENVKPI-AKIPGIAELNIGHAIISRALFVGLEEAVREMK 231 (234) T ss_pred HHHHHCCCHH-HHHHHHHHHHHHHHHHHCCCEEECCCCCCHHHHHHH-HCCCCCEEEECCHHHHHHHHHHHHHHHHHHHH T ss_conf 8786348103-999999999999999985987854789887679998-55899728855799999999974999999999 Q ss_pred HHH Q ss_conf 999 Q gi|254780438|r 244 RAC 246 (261) Q Consensus 244 ~ii 246 (261) T Consensus 232 ~ii 234 (234) T cd00003 232 DLI 234 (234) T ss_pred HHC T ss_conf 759

HHsearch alignment for GI: 254780438 and conserved domain: cd00003