实施例7羰基还原酶催化合成(R)-2-羟基-4-苯基丁酸乙酯
在5L反应釜中,加入36g羰基还原酶粗酶液、12g葡萄糖脱氢酶冻干粉(自制),1100g葡萄糖,2L磷酸缓冲液中(pH6.0-6.5)升温至25-28℃,搅拌15分钟后,分批加入550g2-氧代-4-苯基丁酸乙酯。搅拌反应11小时左右,至底物含量降至1%以下时终止反应。反应终止后经脱色、离心、萃取等操作,得到产物。((R)-2-羟基-4-苯基丁酸乙酯1H NMR(CDCl3,500MHz):δ1.27(t,3H,J=7.1Hz,OCH2CH3),1.95-2.05(m,1H,ArCH2CHH),2.12–2.15(m,1H,ArCH2CHH),2.75–2.80(m,2H,ArCH2),2.93(s,1H,OH),4.17–4.26(m,3H,OCH2CH3,CHOH),7.19-7.28(m,5H,Ar-H);13C NMR(CDCl3,125MHz):δ15,32,36,63,71,125,127,128,140,176.经HPLC分析确定底物转化率98.1%,产物的ee 99.5%。
产物ee值的具体分析条件为:Waters symmetry C18色谱柱(150×3.9mm,5um),流动相0.1%磷酸水溶液:乙腈=60:40;检测波长210nm,流速1.0mL/min,柱温25℃。
<110> 江苏阿尔法药业有限公司
<120> 一种羰基还原酶突变体及其在手性醇制备中的应用
<160> 5
<210> 1
<211> 933
<212> DNA
<213> 人工序列
<220>
<223> 羰基还原酶突变体基因
<400> 1
atgtctctga agaactctac tgccactttg aagctaacta ccggtgctga aatcccagtt 60
gtcggactgg gtacctggag gtctgctgcc aacgatggtt acgattctgt tctagctgcc 120
ttgaagctgg gttacagaca tatcgatgct gctgccatct atggtaacga ggaccaagtt 180
gggagagcca ttaaggactc tggtgtgcca agacaagaaa tatttatcac aacgaaacta 240
tggggtaccg aagatagaaa cccagccaaa tctctggact cctctttgaa aaggctgggg 300
ttggactatg ttgatttgta tttgatgcat tggccggttg ctcttaaggc ccatggctct 360
gaggagaagg acttgctcaa cattccaaaa aaaccagatg gcaagactga tattgacatc 420
gaggattggg atttcatcaa gacttgggaa ttaatgcagg agctaccaaa aactggtaaa 480
accaaggcaa ttggtgtctc caacttttct ataaataatc tgaaggcgtt gaaaaactct 540
ccaaagttca acactgttcc agccgctaac caggttgaaa ttcatccatt atttccacaa 600
accgaattga tcgaatactg taagagtgaa aatatcctga ttgaagccta ctctccattt 660
ggtagtgcag atgccccagt tttaaaggat ccagaattac acaaacttgc tgagaaatac 720
aatattagca ctgcccaact aatcatcagc tggagtgtac aaaggggtta cgttgttctt 780
ccaaaatctg tgcatgcaga gagaattgaa actaacttga aggtattaac cctgaaggat 840
gaagacatgg aaaccattac caacttgtcc aaagtcaaag gtgaaaagag attggtacaa 900
ctggactggt cacctttccc tacatttgaa tag 933
<210> 2
<211> 310
<212> DNA
<213> 人工序列
<220>
<223> 羰基还原酶突变体
<400> 2
Met Ser Leu Lys Asn Ser Thr Ala Thr Leu Lys Leu Ala Thr Gly Ala
5 10 15
Glu Ile Pro Val Val Gly Leu Gly Thr Trp Arg Ser Ala Ala Asn Asp
20 25 30
Gly Tyr Asp Ser Val Leu Ala Ala Leu Lys Leu Gly Tyr Arg His Ile
35 40 45
Asp Ala Ala Ala Ile Tyr Gly Asn Glu Asp Gln Val Gly Arg Ala Ile
50 55 60
Lys Asp Ser Gly Val Pro Arg Gln Glu Ile Phe Ile Thr Thr Lys Leu
65 70 75 80
Trp Gly Thr Glu Asp Arg Asn Pro Ala Lys Ser Leu Asp Ser Ser Leu
85 90 95
Lys Arg Leu Gly Leu Asp Tyr Val Asp Leu Tyr Leu Met His Trp Pro
100 105 110
Val Ala Leu Lys Ala His Gly Ser Glu Glu Lys Asp Leu Leu Asn Ile
115 120 125
Pro Lys Lys Pro Asp Gly Lys Thr Asp Ile Asp Ile Glu Asp Trp Asp
130 135 140
Phe Ile Lys Thr Trp Glu Leu Met Gln Glu Leu Pro Lys Thr Gly Lys
145 150 155 160
Thr Lys Ala Ile Gly Val Ser Asn Phe Ser Ile Asn Asn Leu Lys Ala
165 170 175
Leu Lys Asn Ser Pro Lys Phe Asn Thr Val Pro Ala Ala Asn Gln Val
180 185 190
Glu Ile His Pro Leu Phe Pro Gln Thr Glu Leu Ile Glu Tyr Cys Lys
195 200 205
Ser Glu Asn Ile Leu Ile Glu Ala Tyr Ser Pro Phe Gly Ser Ala Asp
210 215 220
Ala Pro Val Leu Lys Asp Pro Glu Leu His Lys Leu Ala Glu Lys Tyr
225 230 235 240
Asn Ile Ser Thr Ala Gln Leu Ile Ile Ser Trp Ser Val Gln Arg Gly
245 250 255
Tyr Val Val Leu Pro Lys Ser Val His Ala Glu Arg Ile Glu Thr Asn
260 265 270
Leu Lys Val Leu Thr Leu Lys Asp Glu Asp Met Glu Thr Ile Thr Asn
275 280 285
Leu Ser Lys Val Lys Gly Glu Lys Arg Leu Val Gln Leu Asp Trp Ser
290 295 300
Pro Phe Pro Thr Phe Glu
305 310
<210> 3
<211> 933
<212> DNA
<213> 光滑假丝酵母Candida glabrata CBS 138
<220>
<223> 野生型羰基还原酶编码基因
<400> 3
atgtctctga agaactctac tgccactttg aagctaaaca ccggtgctga aatcccagtt 60
gtcggactgg gtacctggag gtctgctgcc aacgatggtt acgattctgt tctagctgcc 120
ttgaagctgg gttacagaca tatcgatgct gctgccatct atggtaacga ggaccaagtt 180
gggagagcca ttaaggactc tggtgtgcca agacaagaaa tatttatcac aacgaaacta 240
tggggtaccg aacatagaaa cccagccaaa gctctggact cctctttgaa aaggctgggg 300
ttggactatg ttgatttgta tttgatgcat tggccggttg ctcttaaggc ccatggctct 360
gaggagaagg acttgctcaa cattccaaaa aaaccagatg gcaagactga tattgacatc 420
gaggattggg atttcatcaa gacttgggaa ttaatgcagg agctaccaaa aactggtaaa 480
accaaggcaa ttggtgtctc caacttttct ataaataatc tgaaggcgtt gaaaaactct 540
ccaaagttca acactgttcc agccgctaac caggttgaaa ttcatccatt atttccacaa 600
accgaattga tcgaatactg taagagtgaa aatatcctga ttgaagccta ctctccattt 660
ggtagtgcag atgccccagt tttaaaggaa ccagaattac acaaacttgc tgagaaatac 720
aatattagca ctgcccaact aatcatcagc tggagtgtac aaaggggtta cgttgttctt 780
ccaaaatctg tgcatgcaga gagaattgaa gccaacttga aggtattaac cctgaaggat 840
gaagacatgg aaaccattac caacttgtcc aaagtcaaag gtgaaaagag attggtacaa 900
ctggactggt cacctttccc tacatttgaa tag 933
<210> 4
<211> 32
<212> DNA
<213> 人工序列
<220>
<223> 羰基还原酶基因上游引物
<400> 4
ggcgcggatc cactctactg ccactttgaa gc 32
<210> 5
<211> 32
<212> DNA
<213> 人工序列
<220>
<223> 羰基还原酶基因下游引物
<400> 5
cgcagaagct taatgtaggg aaaggtgacc a 31