>cd06817 PLPDE_III_DSD Type III Pyridoxal 5-phosphate (PLP)-Dependent Enzyme Eukaryotic D-Serine Dehydratase. This subfamily is composed of chicken D-serine dehydratase (DSD, EC 4.3.1.18) and similar eukaryotic proteins. Chicken DSD catalyzes the dehydration of D-serine to aminoacrylate, which is rapidly hydrolyzed to pyruvate and ammonia. It is a fold type III PLP-dependent enzyme with similarity to bacterial alanine racemase (AR), which contains an N-terminal PLP-binding TIM-barrel domain and a C-terminal beta-sandwich domain. AR exists as dimers with active sites that lie at the interface between the TIM barrel domain of one subunit and the beta-sandwich domain of the other subunit. Experimental data suggest that chicken DSD also exists as dimers. Sequence comparison and biochemical experiments show that chicken DSD is distinct from the ubiquitous bacterial DSDs coded by dsdA gene, mammalian L-serine dehydratases (LSD) and mammalian serine racemase (SerRac), which are fold type II PL

Probab=99.86 E-value=2.2e-19 Score=151.83 Aligned_cols=339 Identities=14% Similarity=0.119 Sum_probs=203.5 Q ss_pred HHCCCCEEEEEHHHHHHHHHHHHHHCCCCCCEEEEEEECCCCHHHHHHHHHCC--C-CEEEECHHHHHHHHHCCCC--CC Q ss_conf 97499789977999999999999861447978999641079999999999739--9-2898689998652212578--43 Q gi|254780371|r 23 HVVQTPFYCYSTTAIEKNYLTFSNAFDGMDTMVCYALKANSNQAVIKTLAHLG--S-GLDIVSEGELRRALAAPVP--AE 97 (431) Q Consensus 23 ~~~gTP~yV~d~~~i~~n~~~l~~a~~~~~~~i~yAvKaN~~~~il~~l~~~G--~-g~dv~S~~El~~al~~G~~--~~ 97 (431) T Consensus 2 ~~l~TPallvd~~~l~~Ni~~M~~~~~~~gv~lRPH~KTHKs~~ia~~Ql~aG~~a~git~atv~EAe~~a~~G~~~~~~ 81 (389) T cd06817 2 SDLPTPALVIDRAKFKRNCERMLQRAKALGVKFRPHVKTHKTLEGTRLQLGEGRPSRGIVVSTLAEAEFLLPLGEEGRVD 81 (389) T ss_pred CCCCCCEEEECHHHHHHHHHHHHHHHHHCCCCCCCCCHHHCCHHHHHHHHHCCCCCCCEEECCHHHHHHHHHHHHHCCCE T ss_conf 87899739981999999999999999875995711517651699999999779983538975799999999854516622 Q ss_pred CEEECCCCCCCHHHHHHH---HC-CCCCCCCCCCHHHHHHHHHH-CCCCCCEEEEEEEECCCCCCCCCCCCCCCCCCCCC Q ss_conf 124447754201244442---06-87233332202467687741-13344215899872377867443332233444568 Q gi|254780371|r 98 RIVFSGVGKTIDEIDLAL---QS-GIYCFNVESESELKTLNQRA-VSLGKKAPIAFRVNPDINANTHKKISTGKKEDKFG 172 (431) Q Consensus 98 ~Ii~~g~~k~~~~l~~ai---~~-gv~~i~vDs~~el~~l~~~a-~~~~~~~~I~lRinp~~~~~~~~~~~tg~~~sKFG 172 (431) T Consensus 82 dil~a~pv~-~~kl~rl~~L~~~~~~l~v~VD~~~~v~~L~~~~~~~~g~~l~V~Ievd~G~--------------~RtG 146 (389) T cd06817 82 DILYGLPVP-PSKLPRLAELSKKLGHLRVMVDNPEQLDFLEQFQPLKSGKKWSVFIKVDCGT--------------HRAG 146 (389) T ss_pred EEEECCCCC-HHHHHHHHHHHCCCCCEEEEECCHHHHHHHHHHHHHHCCCCEEEEEEECCCC--------------CCCC T ss_conf 899888578-7899999998553980899974799999999998862698258999978898--------------9678 Q ss_pred CCCC--CCHHHHHHHHHC-CCCCHHHHHHHHHH--CCCCCHH----HHHHHHHHHHHHHHHHC-CCCCCCEEEECCCCCC Q ss_conf 8711--113457776415-63220023355641--5644204----89999999988765310-2666526880687300 Q gi|254780371|r 173 IPIH--QIHSLYAYASTL-PGVKISGVDMHIGS--QIDQIES----FHKAFKLLRDLTQQLRS-NGHNIQHIDVGGGLGI 242 (431) Q Consensus 173 i~~~--~~~~~~~~~~~~-~~l~l~GlH~H~GS--~~~~~~~----~~~~~~~~~~~~~~l~~-~g~~~~~ldiGGGf~i 242 (431) T Consensus 147 v~~~~~~~~~l~~~i~~~~~~L~~~Gl~~y~Gh~~~~~~~~e~~~~~~~~~~~~~~~~~~~~~~~g~~~~vvs~G~-Tpt 225 (389) T cd06817 147 VPPESEDAKELIQKLEKASEAVELFGFYSHAGHSYSSRSAEDAKEVLREEIEAVLTAAKKLKSIQGDRKLTLSVGA-TPT 225 (389) T ss_pred CCCCCHHHHHHHHHHHHCCCCCEEEEEECCCCCCCCCCCHHHHHHHHHHHHHHHHHHHHHHHHHCCCCCCEEEECC-CCC T ss_conf 8988399999999998567883577886048755578999999999999999999999998862699875899858-887 Q ss_pred CCCCCCCCCCHHHHHHHHHHHHCCCCCEEEEEECCEECCC--------------CCEEEEEEEEECCCCCCCCEEECCCC Q ss_conf 0266545531145655565421024530344101112036--------------63258887640346897422005530 Q gi|254780371|r 243 AYHSDHRPPSSSDYASLIHQYFGNLQCKIILEPGRFLVAD--------------VGILVTKVISIKKSADKTFVILDVAM 308 (431) Q Consensus 243 ~y~~~~~~~~~~~~~~~i~~~~~~~~~~l~~EPGR~lva~--------------ag~ll~~V~~vK~~~~~~~~~vD~g~ 308 (431) T Consensus 226 ~~~~-~~~~~~~---------~~~~~~~tEl~pG~Yvf~D~~~~~~g~~~~~~~Al~VlatViS~~--p~~~~~ilDaG~ 293 (389) T cd06817 226 AHAA-EALVLIP---------APSLSGLLELHAGNYPFYDLQQVATGLCSEEDIAVFVLAEVISVY--PKRNEALVNAGV 293 (389) T ss_pred CCCC-CCCCCCC---------CCCCCCCEEEECCCEECCCHHHHHCCCCCCCCEEEEEEEEEEEEC--CCCCEEEECCCH T ss_conf 2203-5544224---------555565149702464726887851699983212589999998553--899839976660 Q ss_pred CCCCCCHHHCCCCCCC-CCCCCCCCCCEEEEEEEEEECCCCCEEEE---EEECCCCCCCCEEEEECCCCHHHHHHCCCCC Q ss_conf 0011001110246532-22234677761589998100056666562---1005668888899996797023334027788 Q gi|254780371|r 309 NDFMRPTLYDAYHEIN-YIVNPAGDRLHIHADIVGPICETGDFIAL---NRKIALPRPGDLLYIEKTGAYGAVQSGTYNS 384 (431) Q Consensus 309 ~~~~~p~~~~~~~~i~-~~~~~~~~~~~~~~~i~G~~C~~~D~l~~---~~~lp~l~~GD~l~i~~~GAY~~s~~s~fn~ 384 (431) T Consensus 294 Kals~D~g--~~~~~~g~~~~~~~~~~~~~~~~v~~lseEHg~l~~~~~~~~~~~l~vGd~v~~iP~H~-C~----Tvnl 366 (389) T cd06817 294 LALSREPS--RIYGGFGRVIPWPGPIPGHPEWYLVRLSQEHGILQPRDGDLDFKRLKVGSKVRIIPQHA-CI----TAAM 366 (389) T ss_pred HHEECCCC--CCCCCCCEECCCCCCCCCCCCEEEECCCCCEEEEECCCCCCCCCCCCCCCEEEEECCCC-CC----CCCC T ss_conf 01103567--77788544216777646799728834357515786178765567999888899971885-90----7005 Q ss_pred CCCCEEEEEECC-EE Q ss_conf 986659999889-68 Q gi|254780371|r 385 RLLIPEIMVNGS-QF 398 (431) Q Consensus 385 ~p~p~~v~v~~g-~~ 398 (431) T Consensus 367 ~~--~~~vv~~~~~v 379 (389) T cd06817 367 FP--VYYVVDSGDIV 379 (389) T ss_pred CC--EEEEEECCCEE T ss_conf 88--79999798999

HHsearch alignment for GI: 254780371 and conserved domain: cd06817