Amino Acids

, Volume 35, Issue 2, pp 355–358 | Cite as

Identification and characterisation of arsenite (+3 Oxidation State) methyltransferase (AS3MT) in mouse neuroblastoma cell line N1E-115

  • J. P. P. John
  • J.-E. Oh
  • A. Pollak
  • G. Lubec


Handling and detoxification of metals by enzymes is a major issue that is not in the focus of current biomedical research concepts. The finding of the presence of arsenic (+3 Oxidation State) methyltransferase (AS3MT) in neuroblastoma cells NE-115 as a high abundance protein made us investigate primary structure of AS3MT reflecting an example of metal-handling in eucaryotes. Proteins extracted from NE-115 cells were run on 2-DE followed by two different mass spectrometrical methods. High sequence coverage was obtained by multiple protease digestion and a sequence conflict was solved at arginine 335.

These findings are important when future studies on this enzyme are designed at the protein level and in particular, when antibodies against this protein will be generated.

Keywords: Arsenite methyltransferase – MALDI-TOF-TOF – Nano-LC-ESI-MS/MS – Neuroblastoma cells 


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Copyright information

© Springer-Verlag 2007

Authors and Affiliations

  • J. P. P. John
    • 1
  • J.-E. Oh
    • 1
  • A. Pollak
    • 1
  • G. Lubec
    • 1
  1. 1.Department of PediatricsMedical University of ViennaViennaAustria

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