RPSBLAST alignment for GI: 254780290 and conserved domain: cd05289

>gnl|CDD|176191 cd05289, MDR_like_2, alcohol dehydrogenase and quinone reductase-like medium chain degydrogenases/reductases. Members identified as zinc-dependent alcohol dehydrogenases and quinone oxidoreductase. QOR catalyzes the conversion of a quinone + NAD(P)H to a hydroquinone + NAD(P)+. Quinones are cyclic diones derived from aromatic compounds. Membrane bound QOR actin the respiratory chains of bacteria and mitochondria, while soluble QOR acts to protect from toxic quinones (e.g. DT-diaphorase) or as a soluble eye-lens protein in some vertebrates (e.g. zeta-crystalin). QOR reduces quinones through a semi-quinone intermediate via a NAD(P)H-dependent single electron transfer. QOR is a member of the medium chain dehydrogenase/reductase family, but lacks the zinc-binding sites of the prototypical alcohol dehydrogenases of this group. NAD(P)(H)-dependent oxidoreductases are the major enzymes in the interconversion of alcohols and aldehydes, or ketones. Alcohol dehydrogenase in the liver converts ethanol and NAD+ to acetaldehyde and NADH, while in yeast and some other microorganisms ADH catalyzes the conversion acetaldehyde to ethanol in alcoholic fermentation. ADH is a member of the medium chain alcohol dehydrogenase family (MDR), which has a NAD(P)(H)-binding domain in a Rossmann fold of a beta-alpha form. The NAD(H)-binding region is comprised of 2 structurally similar halves, each of which contacts a mononucleotide. A GxGxxG motif after the first mononucleotide contact half allows the close contact of the coenzyme with the ADH backbone. The N-terminal catalytic domain has a distant homology to GroES. These proteins typically form dimers (typically higher plants, mammals) or tetramers (yeast, bacteria), and have 2 tightly bound zinc atoms per subunit, a catalytic zinc at the active site and a structural zinc in a lobe of the catalytic domain. NAD(H) binding occurs in the cleft between the catalytic and coenzyme-binding domains at the active site, and coenzyme binding induces a conformational closing of this cleft. Coenzyme binding typically precedes and contributes to substrate binding. In human ADH catalysis, the zinc ion helps coordinate the alcohol, followed by deprotonation of a histidine, the ribose of NAD, a serine, then the alcohol, which allows the transfer of a hydride to NAD+, creating NADH and a zinc-bound aldehyde or ketone. In yeast and some bacteria, the active site zinc binds an aldehyde, polarizing it, and leading to the reverse reaction. Length = 309
 Score =  214 bits (548), Expect = 2e-56
 Identities = 106/329 (32%), Positives = 158/329 (48%), Gaps = 25/329 (7%)

Query: 7   MRHVAMSGYGKSNVMFLAESPIPQPQKEEILIKVEAIGVNRPDVMQRKGLYPP-PKNANP 65
           M+ V +  YG   V+ LA+ P P+P   E+L+KV A GVN  D+  R+GL         P
Sbjct: 1   MKAVRIHEYGGPEVLELADVPTPEPGPGEVLVKVHAAGVNPVDLKIREGLLKAAFPLTLP 60

Query: 66  -ILGLEVAGKIVDLGENTTHWNIGDEVCALVN---GGGYAEYCLSHQGHTLPIPKGYNAI 121
            I G +VAG +V +G   T + +GDEV  +     GG YAEY +         P   +  
Sbjct: 61  LIPGHDVAGVVVAVGPGVTGFKVGDEVFGMTPFTRGGAYAEYVVVPADELALKPANLSFE 120

Query: 122 QAASLPESFFTVWANLFQTANLRSGQTVLIHGGSSGIGTTAIQLASYFGATVYTTAKSEE 181
           +AA+LP +  T W  LF+   L++GQTVLIHG + G+G+ A+QLA   GA V  TA +  
Sbjct: 121 EAAALPLAGLTAWQALFELGGLKAGQTVLIHGAAGGVGSFAVQLAKARGARVIATASAAN 180

Query: 182 KCLACLKLGAKHAINYLKEDFLEILQKETQGRGIDIILDMVGAEYLNQHLTLLSKEGKLI 241
                  LGA   I+Y K DF    ++     G+D +LD VG E L + L L+   G+  
Sbjct: 181 ADFL-RSLGADEVIDYTKGDF----ERAAAPGGVDAVLDTVGGETLARSLALVKPGGR-- 233

Query: 242 IISFLGGNIATEINLNPIISKRITITGSTLRRRTDIAKQSIRDSLQLKIWPLLNSHVIAP 301
           ++S  G   A +      +            +  ++A+             L+ +  + P
Sbjct: 234 LVSIAGPPPAEQAAKRRGVRAGFVFVEPDGEQLAELAE-------------LVEAGKLRP 280

Query: 302 VIHTVLPLGKVAMAHDIMEKSEHIGKIIL 330
           V+  V PL   A AH+ +E     GK++L
Sbjct: 281 VVDRVFPLEDAAEAHERLESGHARGKVVL 309