>gnl|CDD|176231 cd08270, MDR4, Medium chain dehydrogenases/reductase (MDR)/zinc-dependent alcohol dehydrogenase-like family. This group is a member of the medium chain dehydrogenases/reductase (MDR)/zinc-dependent alcohol dehydrogenase-like family, but lacks the zinc-binding sites of the zinc-dependent alcohol dehydrogenases. The medium chain dehydrogenases/reductase (MDR)/zinc-dependent alcohol dehydrogenase-like family, which contains the zinc-dependent alcohol dehydrogenase (ADH-Zn) and related proteins, is a diverse group of proteins related to the first identified member, class I mammalian ADH. MDRs display a broad range of activities and are distinguished from the smaller short chain dehydrogenases (~ 250 amino acids vs. the ~ 350 amino acids of the MDR). The MDR proteins have 2 domains: a C-terminal NAD(P)-binding Rossmann fold domain of a beta-alpha form and an N-terminal catalytic domain with distant homology to GroES. The MDR group contains a host of activities, including the founding alcohol dehydrogenase (ADH), quinone reductase, sorbitol dehydrogenase, formaldehyde dehydrogenase, butanediol DH, ketose reductase, cinnamyl reductase, and numerous others. The zinc-dependent alcohol dehydrogenases (ADHs) catalyze the NAD(P)(H)-dependent interconversion of alcohols to aldehydes or ketones. Active site zinc has a catalytic role, while structural zinc aids in stability. ADH-like proteins typically form dimers (typically higher plants, mammals) or tetramers (yeast, bacteria), and generally have 2 tightly bound zinc atoms per subunit. The active site zinc is coordinated by a histidine, two cysteines, and a water molecule. The second zinc seems to play a structural role, affects subunit interactions, and is typically coordinated by 4 cysteines. Length = 305

 Score = 94.0 bits (234), Expect = 5e-20
 Identities = 72/274 (26%), Positives = 112/274 (40%), Gaps = 19/274 (6%)

Query: 7   MRHVAMSGYGKSNVMFLAESPIPQPQKEEILIKVEAIGVNRPDVMQRKGLYPPPKNANPI 66
           MR + +       +    E P PQP   E L++V AI +NR ++   K     P  A P 
Sbjct: 1   MRALVVDPDAPLRLRL-GEVPDPQPAPHEALVRVAAISLNRGEL---KFAAERPDGAVP- 55

Query: 67  LGLEVAGKIVDLGENTTHWNIGDEVCALVNGGGYAEYCLSHQGHTLPIPKGYNAIQAASL 126
            G + AG +     + +   +G  V  L   G +AE      G    +P G +  QAA+L
Sbjct: 56  -GWDAAGVVERAAADGSGPAVGARVVGLGAMGAWAELVAVPTGWLAVLPDGVSFAQAATL 114

Query: 127 PESFFTVWANLFQTANLRSGQTVLIHGGSSGIGTTAIQLASYFGATVYTTAKSEEKCLAC 186
           P +  T    L +   L  G+ VL+ G S G+G  A+QLA+  GA V     S  +    
Sbjct: 115 PVAGVTALRALRRGGPL-LGRRVLVTGASGGVGRFAVQLAALAGAHVVAVVGSPARAEGL 173

Query: 187 LKLGAKHAINYLKEDFLEILQKETQGRGIDIILDMVGAEYLNQHLTLLSKEGKLIIISFL 246
            +LGA   +        E+      G  +D+++D VG   L + L LL+  G ++ +   
Sbjct: 174 RELGAAEVV----VGGSEL-----SGAPVDLVVDSVGGPQLARALELLAPGGTVVSVGSS 224

Query: 247 GGNIATEINLNPIISK--RITITGSTLRRRTDIA 278
            G  A   N    +       +    L     +A
Sbjct: 225 SGEPAV-FNPAAFVGGGGGRRLYTFFLYDGEPLA 257