RPSBLAST alignment for GI: 254780290 and conserved domain: cd08266
>gnl|CDD|176227 cd08266, Zn_ADH_like1, Alcohol dehydrogenases of the MDR family. This group contains proteins related to the zinc-dependent alcohol dehydrogenases. However, while the group has structural zinc site characteristic of these enzymes, it lacks the consensus site for a catalytic zinc. 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 = 342
Score = 248 bits (635), Expect = 2e-66
Identities = 114/355 (32%), Positives = 180/355 (50%), Gaps = 42/355 (11%)
Query: 7 MRHVAMSGYGKSNVMFLAESPIPQPQKEEILIKVEAIGVNRPDVMQRKGLYPPPKNANPI 66
M+ V + G+G V+ + P P+P +E+L++V+A +N D+ R+G+ I
Sbjct: 1 MKAVVIRGHGGPEVLEYGDLPEPEPGPDEVLVRVKAAALNHLDLWVRRGMPGIKLPLPHI 60
Query: 67 LGLEVAGKIVDLGENTTHWNIGDEVCALVNGG---GYAEYCLS--------------HQG 109
LG + AG + +G T+ G V ++ G G EYCL+ H
Sbjct: 61 LGSDGAGVVEAVGPGVTNVKPGQRV--VIYPGISCGRCEYCLAGRENLCAQYGILGEHVD 118
Query: 110 HT------------LPIPKGYNAIQAASLPESFFTVWANLFQTANLRSGQTVLIHGGSSG 157
LPIP + +AA+ P +F T W L A LR G+TVL+HG SG
Sbjct: 119 GGYAEYVAVPARNLLPIPDNLSFEEAAAAPLTFLTAWHMLVTRARLRPGETVLVHGAGSG 178
Query: 158 IGTTAIQLASYFGATVYTTAKSEEKCLACLKLGAKHAINYLKEDFLEILQKETQGRGIDI 217
+G+ AIQ+A FGATV TA SE+K +LGA + I+Y KEDF+ +++ T RG+D+
Sbjct: 179 VGSAAIQIAKLFGATVIATAGSEDKLERAKELGADYVIDYRKEDFVREVRELTGKRGVDV 238
Query: 218 ILDMVGAEYLNQHLTLLSKEGKLIIISFLGGNIATEINLNPIISKRITITGSTLRRRTDI 277
+++ VGA + L L++ G+L+ G A I+L + ++++I GST+ + ++
Sbjct: 239 VVEHVGAATWEKSLKSLARGGRLVTCGATTGYEA-PIDLRHVFWRQLSILGSTMGTKAEL 297
Query: 278 AKQSIRDSLQLKIWPLLNSHVIAPVIHTVLPLGKVAMAHDIMEKSEHIGKIILLP 332
+ L+ + PVI +V PL + A AH +E E GKI+L P
Sbjct: 298 D----------EALRLVFRGKLKPVIDSVFPLEEAAEAHRRLESREQFGKIVLTP 342