Bioanalysis for Biocatalysis: Multiplexed Capillary Electrophoresis-Mass Spectrometry Assay for Aminotransferase Substrate Discovery and Specificity Profiling.

In this work, we introduce an entirely automated enzyme assay based on capillary electrophoresis coupled to electrospray ionization mass spectrometry termed MINISEP-MS for multiple interfluent nanoinjections-incubation-separation-enzyme profiling using mass spectrometry. MINISEP-MS requires only nan...

Descripción completa

Detalles Bibliográficos
Publicado en:Journal of the American Chemical Society Vol. 135; no. 37; pp. 13728 - 13737
Autores principales: Mironov, Gleb G., St-Jacques, Antony D., Mungham, Alexander, Eason, Matthew G., Chica, Roberto A., Berezovski, Maxim V.
Formato: Artículo
Publicado: American Chemical Society 9/18/2013
Materias:
Acceso en línea:Ver este registro en EBSCOhost
fields @attributes:
  recordID: 1
pdfLink:
plink: https://search.ebscohost.com/login.aspx?direct=true&db=hlh&AN=90544263&site=ehost-live
header:
  @attributes:
    shortDbName: hlh
    uiTerm: 90544263
    longDbName: Humanities International Complete
    uiTag: AN
  controlInfo:
    bkinfo:
    jinfo:
      jid:
        00027863
        ACS
      jtl: Journal of the American Chemical Society
      issn: 00027863
      maglogo: N
    pubinfo:
      dt: 9/18/2013
      vid: 135
      iid: 37
      pid: 997
      pub: American Chemical Society
    artinfo:
      ui:
        90544263
        10.1021/ja407486z
      ppf: 13728
      ppct: 9
      formats:
      tig:
        atl: Bioanalysis for Biocatalysis: Multiplexed Capillary Electrophoresis-Mass Spectrometry Assay for Aminotransferase Substrate Discovery and Specificity Profiling.
      aug:
        au:
          Mironov, Gleb G.
          St-Jacques, Antony D.
          Mungham, Alexander
          Eason, Matthew G.
          Chica, Roberto A.
          Berezovski, Maxim V.
        affil:
          Department of Chemistry, University of Ottawa, Ottawa, Ontario, Canada, K1N 6N5
          Centre for Catalysis Research and Innovation, University of Ottawa, Ottawa, Ontario, Canada, K1N 6N5
      su:
        Catalysis
        Capillary electrophoresis
        Mass spectrometry
        Aminotransferases
        Microreactors
        Biochemical substrates
        Enzymes
        Amino acids
      sug:
        subj:
          Catalysis
          Capillary electrophoresis
          Mass spectrometry
          Aminotransferases
          Microreactors
          Biochemical substrates
          Enzymes
          Amino acids
      ab: In this work, we introduce an entirely automated enzyme assay based on capillary electrophoresis coupled to electrospray ionization mass spectrometry termed MINISEP-MS for multiple interfluent nanoinjections-incubation-separation-enzyme profiling using mass spectrometry. MINISEP-MS requires only nanoliters of reagent solutions and uses the separation capillary as a microreactor, allowing multiple substrates to be assayed simultaneously. The method can be used to rapidly profile the substrate specificity of any enzyme and to measure steady-state kinetics in an automated fashion. We used the MINISEP-MS assay to profile the substrate specificity of three aminotransferases (E. coli aspartate aminotransferase, E. coli branched-chain amino acid aminotransferase, and Bacillus sp. YM-1 d-amino acid aminotransferase) for 33 potential amino acid substrates and to measure steady-state kinetics. Using MINISEP-MS, we were able to recapitulate the known substrate specificities and to discover new amino acid substrates for these industrially relevant enzymes. Additionally, we were able to measure the apparent KM and kcat parameters for amino acid donor substrates of these aminotransferases. Because of its many advantages, the MINISEP-MS assay has the potential of becoming a useful tool for researchers aiming to identify or create novel enzymes for specific biocatalytic applications.
      pubtype: Academic Journal
      doctype: Article
      src: R
    language: English
    refInfo:
    copyright:
      @attributes:
        flag: Y
      dt:
        @attributes:
          year: 2013
    holdings:
      @attributes:
        islocal: N