Development of mapping and extraction methods of cell surface proteins (オーガナイズドセッション2「ナノ・マイクロレベルのマニピュレーション技術・解析技術」) DEVELOPMENT OF MAPPING AND EXTRACTION METHODS OF CELL SURFACE PROTEINS

Access this Article

Author(s)

Abstract

The atomic force microscope (AFM) has become a valuable tool for cell biologists. Although the AFM has been mainly used as an imaging device, it has recently found several other applications where it is used to study the mechanical response of biological samples against a local application of force. In this paper, we showed that the AFM could be used to extract cell surface proteins using covalent crosslinks between a modified tip and the cell surface for later identification of the extracted proteins and lipids. A series of experiments were performed to extract proteins from a cell surface by using amino reactive, bifunctional covalent crosslinkers between an AFM tip and living Balb 3T3 cells. Results showed that the frequency of the rupture force between modified Si<SUB>3</SUB>N<SUB>4</SUB> tips against the cell surface was high between 100 and 600 pN. The average rupture force was significantly less than the force to break the covalent bond system (1.6 - 1.7 nN), indicating that whatever that was bound to the tip through its amino group was extracted from the cell surface. A similar method was applied to living cells using a modified tip with specific ligand molecules, and it has been shown that receptors on the cell surface could be located and mapped (Kim, Osada and Ikai to be published).

Journal

  • Journal of Japanese Society of Biorheology

    Journal of Japanese Society of Biorheology 16(1), 23-26, 2002-03-30

    JAPANESE SOCIETY OF BIORHEOLOGY

References:  3

Codes

  • NII Article ID (NAID)
    10008442933
  • NII NACSIS-CAT ID (NCID)
    AN10042423
  • Text Lang
    ENG
  • Article Type
    REV
  • ISSN
    09134778
  • NDL Article ID
    6169395
  • NDL Source Classification
    ZR2(科学技術--生物学--生化学)
  • NDL Call No.
    Z18-1996
  • Data Source
    CJP  NDL  J-STAGE 
Page Top