酵母不對稱還原4-羥基-2-丁酮為(R)-1,3-丁二醇的初步研究.pdf_第1頁
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1、江南大學(xué)碩士學(xué)位論文酵母不對稱還原4羥基2丁酮為(R)1,3丁二醇的初步研究姓名:楊套偉申請學(xué)位級別:碩士專業(yè):微生物學(xué)指導(dǎo)教師:饒志明20090601AbstractAbstractChiralcompoundshavebeenwidelyappliedinpharmaceuticals,food,pesticideandchemicalindustryduetotheirspecialopticalactivityWiththepr

2、ogressinpharmacologyofchiralpharmaceuticalsandthestrictregulationontheapplicationofnewracemicdruginrecentyears,theresearchanddevelopmentofchiralpharmaceuticalshavebecomethenewfocusanddirectionEnantiomericallypurealcohols

3、areimportantintermediatesforsynthesisofpharmaceuticalsAsymmetricreductionprochiralketonescatalyzedbymicroorganismortheoxidoreductaseinthecellhasbeenanimportantmethodofsynthesisenantiomericallypurealcohols(R)I,3butanediol

4、((R)I,3BDO)isanimportantmaterialforsynthesizingvariousopticallyactivecompoundssuch38azetidinonederivatives,whichareintermediatematerialforantibioties,pheromones,fragrancesandinsecticidesIthasreportedthatmicrobialscanbeus

5、edteducecarbonylcompoundsintothechiralalcoh01Inthiswork,thereductionofreactionsof4hydroxy2butanone(4H2B)intochlorine13butanediolcatalyzedbyyeastceilswillbestudiedThemaincontentsofthisworkareasfollows:(1)HBY61wasscreenedf

6、rom80yeaststrainspreservedinourlaboratory,whichshowedahi曲bioreductionactivityandenantioselectivityTheproductofasymmetricreductionwasenantiomericallypure(R)1,3BDOTheidentitiesofthestrainswereestablishedbasedontheir18SrRNA

7、sequencesandphysiologicalcharacteristicsResultsindicatedthestrainwhichdesignatedasHBY61wasavarietyofPichiajadiniiwithsimilaritiesof997%(2)Thesampleofsubstrateandproductwereanalyzedqualitativelycomparingwithgaschromatogra

8、phicchartofstandard,theexternalstandardmethodwasusedtodeterminetheirquantityofsample(3)TheexperimentwasusedtooptimizeparametersofthebioreductionconditionofyeastCompositionofculturemediawasdiscussed,theanalyticalresultsin

9、dicatedthattherearethreefactorsincludingglcose,tryponeandK2HP04whichhaveremarkableeffectonbiomassofyeastBasedontheexperiment,themaximalyieldofthebiomass(151g/L)couldbeobtainedwhentheconcentrationsofglcose,yeastextract,tr

10、yptone,KH2P04andMgS04weresetat120g/L,20g/L,20g/L,5g/Land075g/L,respectivelyattheoptimalcultivationnaturalpH,rotatespeed200r/min,inoculationsize2%Inthisconditionthebiomassis19timesoftheinitializationThe(R)1,3BDO(58g/L)and

11、thebiomass(152g/L)wereachievedinstandardreactionsystemusingtheoptimizedmediumThegrowthcurveofyeastwasdetected,whichshowedthehighactivityyeastcouldbeobtainedfor2628hr(4)Thefactorshavingeffectonasymmetricbioreduction4H2Bby

12、yeastHBY61hadbeeninvestigatedinstandardreactionsystemThetechnicalconditionsofbioreductionbyyeastHBY61wereobtained,includingappropriatetemperature(30℃),PH(7o),initialsubconcentration(1%),carbonresource,andglcose(6%)assoon

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