>TIGR01127 ilvA_1Cterm threonine dehydratase; InterPro: IPR005789 Serine and threonine dehydratases , are functionally and structurally related pyridoxal-phosphate dependent enzymes. L-serine dehydratase () and D-serine dehydratase () catalyze the dehydratation of L-serine (respectively D-serine) into ammonia and pyruvate. Threonine dehydratase () (TDH) catalyzes the dehydratation of threonine into alpha-ketobutarate and ammonia. In Escherichia coli and other microorganisms, two classes of TDH are known to exist. One is involved in the biosynthesis of isoleucine, the other in hydroxamino acid catabolism. Threonine synthase () is also a pyridoxal-phosphate enzyme, it catalyzes the transformation of homoserine-phosphate into threonine. It has been shown that threonine synthase is distantly related to the serine/threonine dehydratases. In all these enzymes, the pyridoxal-phosphate group is attached to a lysine residue. A form of threonine dehydratase with two copies of the C-terminal domain is described by . This model describes a phylogenetically distinct which branches with the catabolic threonine dehydratase of E. coli; many members are designated as catabolic for this reason. However, the catabolic form lacks any domain. Many members of this model are found in species with other isoleucine biosynthetic enzymes.; GO: 0004794 L-threonine ammonia-lyase activity.

Probab=96.07 E-value=0.06 Score=33.69 Aligned_cols=283 Identities=16% Similarity=0.152 Sum_probs=150.1 Q ss_pred HCCEEEEEECHHHHHHHHHHHHHHHHHCCCEEEEECCCCC-HHHHHHHHHH-HHHCCCCEEEEEEECCCHHHHEEHHHCC Q ss_conf 3270288504177887689999875313966996056453-0131899987-6412862034333142000000001006 Q gi|254780900|r 97 MRGCHVVTANKALIASHGKDLALLAQKNNAILNFEAAVAG-GIPIIRILKN-YVEYDEINRVYGIINGTCNYILSHMNNL 174 (438) Q Consensus 97 ~~GkhVVTANKallA~~g~eL~~lA~~~gv~l~~easV~g-giPii~~l~~-~l~~~~i~~i~GIlnGT~nyIL~~m~~~ 174 (438) T Consensus 46 ~~~~GVvaASAG---NHAQGVA~AA~~~Gi~---a~IVMPE~aP~~Kv~AT~~y-GAEV-----iL-------------~ 100 (381) T TIGR01127 46 QRKRGVVAASAG---NHAQGVALAAKVFGIK---AKIVMPEYAPLSKVKATKSY-GAEV-----IL-------------H 100 (381) T ss_pred HCCCCEEEECCC---CHHHHHHHHHHHCCCC---CEEECCCCCHHHHHHHHHHC-CCEE-----EE-------------C T ss_conf 134755775045---4378999998761877---46878876735789997626-9618-----98-------------0 Q ss_pred CCCHHHHHHHHH----HCCCCCCCCCCC---CCHHHHHHHHHHHHHHHHCCCCCCCC--CHHHH---HHHCCHHHHHHHH Q ss_conf 877889988787----617615653223---21178999999999998188555310--00122---3204767403478 Q gi|254780900|r 175 GLSFQDCLEEAR----RQGYAEGDATFD---INGVDSSHKIAILSAIAFGIDTSVEG--VYCEG---ISNITLEDIRGAA 242 (438) Q Consensus 175 g~~f~~al~~Aq----~lGyaE~DP~~D---i~G~Daa~Kl~ILa~~~~g~~~~~~~--v~~~g---I~~i~~~di~~a~ 242 (438) T Consensus 101 G~~~DEA~~~A~~~~~~~g~~fvHpF~D~~vmAGQGT------igLEi~ed~pd~D~viVPVGGGGLISGv~----~a~K 170 (381) T TIGR01127 101 GADYDEAYALAEELAEEEGRVFVHPFDDEYVMAGQGT------IGLEIMEDLPDVDTVIVPVGGGGLISGVA----SAAK 170 (381) T ss_pred CCCHHHHHHHHHHHHHHCCCEEEEECCCCEEEECCCH------HHHHHHHCCCCCCEEEEEECCCCHHHHHH----HHHH T ss_conf 8870789999999998609878740588778616748------99999964798137998417871287999----9998 Q ss_pred HCCCEEEEEEEE----------------------EECCCCCEEEEEEEEEECCCCCCCCCCCCCEEEEEEEEE------- Q ss_conf 719858741013----------------------313678356999986416773000366541689831131------- Q gi|254780900|r 243 DFGYCIKFLAMA----------------------RRKGKGIIRYVYPVLLKYDSVMALVDGITNAVVIETNGL------- 293 (438) Q Consensus 243 ~~g~~ikli~~~----------------------~~~~~~i~~~V~P~li~~~~~la~v~g~~Nai~i~~~~~------- 293 (438) T Consensus 171 ~~~P~VkvIGV~aE~ap~m~~Sl~~Gk~~~v~~~~tiADGIaVk~-p--G~lTF~i~-k~~VD~~V~V~eeEIA~A~~~L 246 (381) T TIGR01127 171 KLNPEVKVIGVEAEGAPSMVESLREGKIKAVESVDTIADGIAVKK-P--GDLTFNIV-KEYVDEVVAVDEEEIAKAILLL 246 (381) T ss_pred HHCCCCEEEEEECCCCHHHHHHHHCCCEEEECCCCEEECCCEECC-C--CCCCHHHH-HHHCCCEEEECHHHHHHHHHHH T ss_conf 728994799860278558999985199056045641415211637-8--87674789-9747970884737799999998 Q ss_pred ---EEEEEEECCCCCCCCHHHHHHHHHHHHHCCCCCCCCCCCCCCCCCCCCCCCCCHHHCCCCEEEEEEE--CCCCCHHH Q ss_conf ---0058972687666102068899999974177776556666783100234438853446532799992--48887489 Q gi|254780900|r 294 ---GKLTMTGPGAGGSATASAVLGDICSIAKTNTQKSVSWALGKESSSFSVIHCDGVYEEEKEYFIRLTI--RNFEGILD 368 (438) Q Consensus 294 ---g~~~~~G~GAG~~~TAsaV~sDli~i~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~yYLRl~v--~DkpGVLa 368 (438) T Consensus 247 LEr~Ki~aEGAGA~gv---AA~L~~K~~~~kG~K~~~v~--SGGNID~~~l~~iI~kGL~~~GR~v~I~~~~~D~PG~L~ 321 (381) T TIGR01127 247 LERAKIVAEGAGAVGV---AAVLEDKVDYVKGKKVAVVV--SGGNIDLNLLEKIILKGLVKSGRKVRIETVIPDRPGALY 321 (381) T ss_pred HCCCCEEECCCHHHHH---HHHHHHHCCCCCCCEEEEEE--ECCCCCHHHHHHHHHHHHHCCCCEEEEEEEEECCCCCHH T ss_conf 6077478827458999---99997540368982899998--547768667778865522205836999999823898669 Q ss_pred HHHHHHHHCCCCEEEEEECCCCCCC---CEEEEEEEEEECCHHHHHHHHHHHHCCCCCC Q ss_conf 9999988669957888822677877---6135999921048899999999862383000 Q gi|254780900|r 369 KITSQMSDFNISLRLFSCPHQEENS---QEFSVFMITHKVSGKLIRDAIECFNGKSDAI 424 (438) Q Consensus 369 ~It~ilak~~ISIesi~Q~~~~~~~---~~~~IViiTh~~~e~~i~~ai~~i~~l~~v~ 424 (438) T Consensus 322 ~ll~~~A~~~aNi~~i~hD-R~~~~~~~G~a~v~~~LEt~g~~H~~ei~~~L~~~Gy~f 379 (381) T TIGR01127 322 KLLEVIAEERANIVKIEHD-RLSKEIPPGFAKVELELETRGKEHLDEILKVLRDKGYEF 379 (381) T ss_pred HHHHHHHHHCCCEEEEEEC-CCCCCCCCCCEEEEEEEEECCHHHHHHHHHHHHHCCCEE T ss_conf 9999999816978999973-757777867538999984088689999999997637544

HHsearch alignment for GI: 254780900 and conserved domain: TIGR01127