RPSBLAST alignment for GI: 254780290 and conserved domain: cd05276

>gnl|CDD|176180 cd05276, p53_inducible_oxidoreductase, PIG3 p53-inducible quinone oxidoreductase. PIG3 p53-inducible quinone oxidoreductase, a medium chain dehydrogenase/reductase family member, acts in the apoptotic pathway. PIG3 reduces ortho-quinones, but its apoptotic activity has been attributed to oxidative stress generation, since overexpression of PIG3 accumulates reactive oxygen species. PIG3 resembles the MDR family member quinone reductases, which catalyze the reduction of quinone to hydroxyquinone. 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 = 323
 Score =  506 bits (1305), Expect = e-144
 Identities = 169/324 (52%), Positives = 223/324 (68%), Gaps = 1/324 (0%)

Query: 7   MRHVAMSGYGKSNVMFLAESPIPQPQKEEILIKVEAIGVNRPDVMQRKGLYPPPKNANPI 66
           M+ + +   G   V+ L E P P P   E+LI+V A GVNR D++QR+GLYPPP  A+ I
Sbjct: 1   MKAIVIKEPGGPEVLELGEVPKPAPGPGEVLIRVAAAGVNRADLLQRQGLYPPPPGASDI 60

Query: 67  LGLEVAGKIVDLGENTTHWNIGDEVCALVNGGGYAEYCLSHQGHTLPIPKGYNAIQAASL 126
           LGLEVAG +V +G   T W +GD VCAL+ GGGYAEY +   G  LP+P+G + ++AA+L
Sbjct: 61  LGLEVAGVVVAVGPGVTGWKVGDRVCALLAGGGYAEYVVVPAGQLLPVPEGLSLVEAAAL 120

Query: 127 PESFFTVWANLFQTANLRSGQTVLIHGGSSGIGTTAIQLASYFGATVYTTAKSEEKCLAC 186
           PE FFT W NLFQ   L++G+TVLIHGG+SG+GT AIQLA   GA V  TA SEEK  AC
Sbjct: 121 PEVFFTAWQNLFQLGGLKAGETVLIHGGASGVGTAAIQLAKALGARVIATAGSEEKLEAC 180

Query: 187 LKLGAKHAINYLKEDFLEILQKETQGRGIDIILDMVGAEYLNQHLTLLSKEGKLIIISFL 246
             LGA  AINY  EDF E +++ T GRG+D+ILDMVG +YL ++L  L+ +G+L++I  L
Sbjct: 181 RALGADVAINYRTEDFAEEVKEATGGRGVDVILDMVGGDYLARNLRALAPDGRLVLIGLL 240

Query: 247 GGNIATEINLNPIISKRITITGSTLRRRTDIAKQSIRDSLQLKIWPLLNSHVIAPVIHTV 306
           GG  A E++L P++ KR+T+TGSTLR R+   K ++  + +  +WPL  S  I PVI  V
Sbjct: 241 GGAKA-ELDLAPLLRKRLTLTGSTLRSRSLEEKAALAAAFREHVWPLFASGRIRPVIDKV 299

Query: 307 LPLGKVAMAHDIMEKSEHIGKIIL 330
            PL + A AH  ME +EHIGKI+L
Sbjct: 300 FPLEEAAEAHRRMESNEHIGKIVL 323