RPSBLAST alignment for GI: 254780290 and conserved domain: cd08290
>gnl|CDD|176250 cd08290, ETR, 2-enoyl thioester reductase (ETR). 2-enoyl thioester reductase (ETR) catalyzes the NADPH-dependent conversion of trans-2-enoyl acyl carrier protein/coenzyme A (ACP/CoA) to acyl-(ACP/CoA) in fatty acid synthesis. 2-enoyl thioester reductase activity has been linked in Candida tropicalis as essential in maintaining mitiochondrial respiratory function. This ETR family is a part of the medium chain dehydrogenase/reductase family, but lack the zinc coordination sites characteristic of the alcohol dehydrogenases in this family. 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. 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. Candida tropicalis enoyl thioester reductase (Etr1p) catalyzes the NADPH-dependent reduction of trans-2-enoyl thioesters in mitochondrial fatty acid synthesis. Etr1p forms homodimers, with each subunit containing a nucleotide-binding Rossmann fold domain and a catalytic domain. Length = 341
Score = 79.2 bits (196), Expect = 2e-15
Identities = 75/315 (23%), Positives = 125/315 (39%), Gaps = 26/315 (8%)
Query: 13 SGYGK-SNVMFLAESPIPQPQ-KEEILIKVEAIGVNRPDVMQRKGLYP--PPKNANP--I 66
+ +G+ V+ L IP P E+L+K+ A +N D+ Q +G+YP PP P +
Sbjct: 7 TEHGEPKEVLQLESYEIPPPGPPNEVLVKMLAAPINPADINQIQGVYPIKPPTTPEPPAV 66
Query: 67 LGLEVAGKIVDLGENTTHWNIGDEVCALVNGGG-YAEYCLSHQGHTLPIPKGYNAIQAAS 125
G E G++V +G GD V L G G + + + + +P + QAA+
Sbjct: 67 GGNEGVGEVVKVGSGVKSLKPGDWVIPLRPGLGTWRTHAVVPADDLIKVPNDVDPEQAAT 126
Query: 126 LPESFFTVWANLFQTANLRSGQTVLIHGGSSGIGTTAIQLASYFGATV---------YTT 176
L + T + L L+ G V+ +G +S +G IQLA G
Sbjct: 127 LSVNPCTAYRLLEDFVKLQPGDWVIQNGANSAVGQAVIQLAKLLGIKTINVVRDRPDLEE 186
Query: 177 AKSEEKCLACLKLGAKHAINY---LKEDFLEILQKETQGRGIDIILDMVGAEYLNQHLTL 233
K K LGA H + E+L K G + L+ VG + + L
Sbjct: 187 LKERLK-----ALGADHVLTEEELRSLLATELL-KSAPGGRPKLALNCVGGKSATELARL 240
Query: 234 LSKEGKLIIISFLGGNIATEINLNPIISKRITITGSTLRRRTDIAKQSIRDSLQLKIWPL 293
LS G ++ + G + + +I K IT+ G L R A ++ + ++ L
Sbjct: 241 LSPGGTMVTYGGMSGQ-PVTVPTSLLIFKDITLRGFWLTRWLKRANPEEKEDMLEELAEL 299
Query: 294 LNSHVIAPVIHTVLP 308
+ + +
Sbjct: 300 IREGKLKAPPVEKVT 314