>gnl|CDD|176208 cd08246, crotonyl_coA_red, crotonyl-CoA reductase. Crotonyl-CoA reductase, a member of the medium chain dehydrogenase/reductase family, catalyzes the NADPH-dependent conversion of crotonyl-CoA to butyryl-CoA, a step in (2S)-methylmalonyl-CoA production for straight-chain fatty acid biosynthesis. Like enoyl reductase, another enzyme in fatty acid synthesis, crotonyl-CoA reductase is a member of the zinc-dependent alcohol dehydrogenase-like medium chain dehydrogenase/reductase family. The medium chain dehydrogenases/reductase (MDR)/zinc-dependent alcohol dehydrogenase-like family, which contains the zinc-dependent alcohol dehydrogenase (ADH-Zn) and related proteins, is a diverse group of proteins related to the first identified member, class I mammalian ADH. MDRs display a broad range of activities and are distinguished 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 catalytic domain with distant homology to GroES. Length = 393

 Score = 90.6 bits (225), Expect = 5e-19
 Identities = 63/218 (28%), Positives = 90/218 (41%), Gaps = 47/218 (21%)

Query: 27  PIPQPQKEEILIKVEAIGVN---------RP----DVMQRKGLYPPPKNANPILGLEVAG 73
           P+P+    E+L+ V A GVN          P       QR+G   P      I G + +G
Sbjct: 36  PVPELGPGEVLVAVMAAGVNYNNVWAALGEPVSTFAARQRRGRDEPYH----IGGSDASG 91

Query: 74  KIVDLGENTTHWNIGDEV---CALVNG-------------------------GGYAEYCL 105
            +  +GE   +W +GDEV   C++ +G                         G +A++ L
Sbjct: 92  IVWAVGEGVKNWKVGDEVVVHCSVWDGNDPERAGGDPMFDPSQRIWGYETNYGSFAQFAL 151

Query: 106 SHQGHTLPIPKGYNAIQAASLPESFFTVWANLF--QTANLRSGQTVLIHGGSSGIGTTAI 163
                 +P PK  +  +AA+      T +  LF      ++ G  VLI G S G+G+ AI
Sbjct: 152 VQATQLMPKPKHLSWEEAAAYMLVGATAYRMLFGWNPNTVKPGDNVLIWGASGGLGSMAI 211

Query: 164 QLASYFGATVYTTAKSEEKCLACLKLGAKHAINYLKED 201
           QLA   GA       SEEK   C  LGA+  IN    D
Sbjct: 212 QLARAAGANPVAVVSSEEKAEYCRALGAEGVINRRDFD 249