RPSBLAST alignment for GI: 254780290 and conserved domain: cd08235
>gnl|CDD|176197 cd08235, iditol_2_DH_like, L-iditol 2-dehydrogenase. Putative L-iditol 2-dehydrogenase based on annotation of some members in this subgroup. L-iditol 2-dehydrogenase catalyzes the NAD+-dependent conversion of L-iditol to L-sorbose in fructose and mannose metabolism. This enzyme is related to sorbitol dehydrogenase, alcohol dehydrogenase, and other medium chain dehydrogenase/reductases. The zinc-dependent alcohol dehydrogenase (ADH-Zn)-like family of proteins is a diverse group of proteins related to the first identified member, class I mammalian ADH. This group is also called the medium chain dehydrogenases/reductase family (MDR) to highlight its broad range of activities and to distinguish 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 GroES-like catalytic domain. 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 = 343
Score = 121 bits (306), Expect = 2e-28
Identities = 87/291 (29%), Positives = 136/291 (46%), Gaps = 41/291 (14%)
Query: 15 YGKSNVMFLAESPIPQPQKEEILIKVEAIGVNRPDVMQRKGLYPPPKNANPILGLEVAGK 74
+G ++V L E P+P+P E+L+KV A G+ DV + +G + K ILG E+AG+
Sbjct: 7 HGPNDVR-LEEVPVPEPGPGEVLVKVRACGICGTDVKKIRGGHTDLK-PPRILGHEIAGE 64
Query: 75 IVDLGENTTHWNIGDEVCALVN---------------------------GGGYAEYCL-- 105
IV++G+ T + +GD V + GG+AEY
Sbjct: 65 IVEVGDGVTGFKVGDRVFVAPHVPCGECHYCLRGNENMCPNYKKFGNLYDGGFAEYVRVP 124
Query: 106 ---SHQGHTLPIPKGYNAIQAASLPESFFTVWANLFQTANLRSGQTVLIHGGSSG-IGTT 161
+G L +P + +AA L E + A ++ G TVL+ G +G IG
Sbjct: 125 AWAVKRGGVLKLPDNVSFEEAA-LVEPLACCINAQ-RKAGIKPGDTVLVIG--AGPIGLL 180
Query: 162 AIQLASYFGA-TVYTTAKSEEKCLACLKLGAKHAINYLKEDFLEILQKETQGRGIDIILD 220
LA GA V + +E + KLGA + I+ +ED +E +++ T GRG D+++
Sbjct: 181 HAMLAKASGARKVIVSDLNEFRLEFAKKLGADYTIDAAEEDLVEKVRELTDGRGADVVIV 240
Query: 221 MVGA-EYLNQHLTLLSKEGKLIIISFLGGNIATEINLNPIISKRITITGST 270
G+ E Q L L+ K G+++ L I+ N I + ITITGS
Sbjct: 241 ATGSPEAQAQALELVRKGGRILFFGGLPKGSTVNIDPNLIHYREITITGSY 291