RPSBLAST alignment for GI: 254780290 and conserved domain: cd08279
>gnl|CDD|176240 cd08279, Zn_ADH_class_III, Class III alcohol dehydrogenase. Glutathione-dependent formaldehyde dehydrogenases (FDHs, Class III ADH) are members of the zinc-dependent/medium chain alcohol dehydrogenase family. FDH converts formaldehyde and NAD(P) to formate and NAD(P)H. The initial step in this process the spontaneous formation of a S-(hydroxymethyl)glutathione adduct from formaldehyde and glutathione, followed by FDH-mediated oxidation (and detoxification) of the adduct to S-formylglutathione. 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. Class III ADH are also known as glutathione-dependent formaldehyde dehydrogenase (FDH), which convert aldehydes to corresponding carboxylic acid and alcohol. 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 an 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. Length = 363
Score = 84.5 bits (210), Expect = 4e-17
Identities = 77/308 (25%), Positives = 118/308 (38%), Gaps = 63/308 (20%)
Query: 28 IPQPQKEEILIKVEAIGVNRPDVMQRKGLYPPPKNANPILGLEVAGKIVDLGENTTHWNI 87
+ P E+L+++ A G+ D+ G P P A +LG E AG + ++G T
Sbjct: 20 LDDPGPGEVLVRIAAAGLCHSDLHVVTGDLPAPLPA--VLGHEGAGVVEEVGPGVTGVKP 77
Query: 88 GDEV---------------------CALVNG--------------------------GGY 100
GD V C L G G +
Sbjct: 78 GDHVVLSWIPACGTCRYCSRGQPNLCDLGAGILGGQLPDGTRRFTADGEPVGAMCGLGTF 137
Query: 101 AEYCLSHQGHTLPIPKGYNAIQAASLPESFFTVWANLFQTANLRSGQTVLIHG-GSSGIG 159
AEY + + + I +AA L T + TA +R G TV + G G G+G
Sbjct: 138 AEYTVVPEASVVKIDDDIPLDRAALLGCGVTTGVGAVVNTARVRPGDTVAVIGCG--GVG 195
Query: 160 TTAIQLASYFGA-TVYTTAKSEEKCLACLKLGAKHAINYLKEDFLEILQKETQGRGIDII 218
AIQ A GA + EK + GA H +N ++D +E ++ T GRG D
Sbjct: 196 LNAIQGARIAGASRIIAVDPVPEKLELARRFGATHTVNASEDDAVEAVRDLTDGRGADYA 255
Query: 219 LDMVG-AEYLNQHLTLLSKEGKLIIISFLGGNIATEINLNPII----SKRI--TITGSTL 271
+ VG A + Q L + K G +++ G ++L + KR+ ++ GS
Sbjct: 256 FEAVGRAATIRQALAMTRKGGTAVVVG--MGPPGETVSLPALELFLSEKRLQGSLYGSA- 312
Query: 272 RRRTDIAK 279
R DI +
Sbjct: 313 NPRRDIPR 320