>gnl|CDD|176196 cd08234, threonine_DH_like, L-threonine dehydrogenase. L-threonine dehydrogenase (TDH) catalyzes the zinc-dependent formation of 2-amino-3-ketobutyrate from L-threonine, via NAD(H)-dependent oxidation. THD is a member of the zinc-requiring, medium chain NAD(H)-dependent alcohol dehydrogenase family (MDR). MDRs have a NAD(P)(H)-binding domain in a Rossmann fold of a beta-alpha form. NAD(P)(H)-dependent oxidoreductases are the major enzymes in the interconversion of alcohols and aldehydes, or ketones. The N-terminal region typically has an all-beta catalytic domain. These proteins typically form dimers (typically higher plants, mammals) or tetramers (yeast, bacteria), and have 2 tightly bound zinc atoms per subunit. Sorbitol and aldose reductase are NAD(+) binding proteins of the polyol pathway, which interconverts glucose and fructose. Length = 334

Score = 92.6 bits (231), Expect = 1e-19 Identities = 73/279 (26%), Positives = 116/279 (41%), Gaps = 42/279 (15%) Query: 23 LAESPIPQPQKEEILIKVEAIGVNRPDVMQRKGLYPPPKNANP-ILGLEVAGKIVDLGEN 81 + E P+P+P +E+LIKV A G+ D+ +G + A P + G E AG +V +G Sbjct: 14 VEEVPVPEPGPDEVLIKVAACGICGTDLHIYEGEFGA---APPLVPGHEFAGVVVAVGSK 70 Query: 82 TTHWNIGDEVCALVN-----------------------G----GGYAEYCLSHQGHTLPI 114 T + +GD V N G GG+AEY + I Sbjct: 71 VTGFKVGDRVAVDPNIYCGECFYCRRGRPNLCENLTAVGVTRNGGFAEYVVVPAKQVYKI 130 Query: 115 PKGYNAIQAASLPESFFTVWANLFQTANLRSGQTVLIHGGSSGIGTTAIQLA-SYFGATV 173 P + +AA L E + ++ G +VL+ G IG QL + V Sbjct: 131 PDNLSFEEAA-LAEPLSCA-VHGLDLLGIKPGDSVLVFGAGP-IGLLLAQLLKLNGASRV 187 Query: 174 YTTAKSEEKCLACLKLGAKHAINYLKEDFLEILQKETQGRGIDIILDMVG-AEYLNQHLT 232 +EEK KLGA ++ +ED QKE G D++++ G + L Q + Sbjct: 188 TVAEPNEEKLELAKKLGATETVDPSRED--PEAQKEDNPYGFDVVIEATGVPKTLEQAIE 245 Query: 233 LLSKEGKLIIISFLGGNIATEINLNP--IISKRITITGS 269 + G +++ F ++++P I K +TI GS Sbjct: 246 YARRGGTVLV--FGVYAPDARVSISPFEIFQKELTIIGS 282

RPSBLAST alignment for GI: 254780290 and conserved domain: cd08234