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Activity analysis of expression conditions on ion dependent of metal activated enzyme NAOase

表达条件对金属激活酶NAOase离子依赖的活性分析



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ChineseJournalofBioprocessEngineering
Vol.11No.5
Sep.2013
doi:10.3969/j.issn.1672-3678.2013.05.010
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N
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:1672-3678(2013)05-0049-06
Activityanalysisofexpressionconditionsoniondependentof
metalactivatedenzymeNAOase
WUYuanli,LIHuan,ZHANGChen,WEIPing
(ColegeofBiotechnologyandPharmaceuticalEngineering,NanjingUniversityofTechnology,Nanjing211800,China)
Abstract:Asanovelchiralseparatorofenzymepreparations,theactivityofacetylornihinedeacetylase
dependedonsomeofMg2+,Mn2+,Zn2+andCo2+ ions.RecombinedDH10B/argEpHshofhigh
expressionNAOasewasinvestigated.Themetalionswerechosentoprobetheirefectsonthegrowthof
recombinantbacteriaandenzymeexpressionactivityunderdiferentcultureconditions.Theresultwas
thatunderdiferentconditionsthesameionshadlitleefectonthegrowthofrecombinantbacteria,but
hadasignificantefectontheenzymeactivitieswhenithadappropriateconcentration.Alfourions
enhancedtheactivityofenzyme,andintheorderofMg2+,Mn2+,Zn2+,andCo2+ fromhightolow.
WhentheTBmediumcontained15mmol/LofMn2+,activityoftheenzymereached12727U/mL.It
was467timeshigherthanthatofwithoutMn2+inTBmedium.Additionaly,theefectofactivationwas
significantlybeterthanthatwithotherions.SDSPAGEshowedthattheamountsofproteinexpressionof
thefourionsweresimilar
Keywords:Nacetylornithinedeacetylase;metalions;expressconditions
  
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