Molecular investigations on the high-affinity nerve growth factor receptor

Neuron. 1991 Jan;6(1):153-63. doi: 10.1016/0896-6273(91)90130-r.

Abstract

Nerve growth factor (NGF) receptors have been investigated by means of affinity labeling with 125I-NGF and chemical cross-linking. Two distinct NGF-receptor complexes are detected on PC12 cells; these correspond to 100 kd and 158 kd for the low-affinity (LNGFR) and the high-affinity (HNGFR) receptors, respectively. Interestingly, three different antibodies directed against distinct epitopes on the LNGFR immunoprecipitate the low-but not the high-affinity NGF-receptor complex. Although the identities of the signaling molecules in the HNGFR are unknown, antibodies to the src, ras, raf-1, and yes products fail to immunoprecipitate either receptor complex, suggesting that these molecules are not a part of, or tightly coupled to, either receptor type. Phosphotyrosine residues are found exclusively on the HNGFR complex, suggesting that tyrosine phosphorylation may be one of the initiating events in the NGF-induced signal transduction cascade.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Adrenal Gland Neoplasms / chemistry
  • Affinity Labels
  • Animals
  • Antibodies, Monoclonal / immunology
  • Antibody Specificity
  • Cross-Linking Reagents
  • Epitopes / immunology
  • Humans
  • Immunosorbent Techniques
  • Macromolecular Substances
  • Male
  • Mice
  • Molecular Weight
  • Nerve Growth Factors / metabolism*
  • Pheochromocytoma / chemistry
  • Phosphotyrosine
  • Proto-Oncogene Proteins / immunology
  • Proto-Oncogene Proteins / metabolism
  • Rats
  • Receptors, Cell Surface / analysis
  • Receptors, Cell Surface / immunology*
  • Receptors, Cell Surface / metabolism*
  • Receptors, Nerve Growth Factor
  • Signal Transduction
  • Tumor Cells, Cultured
  • Tyrosine / analogs & derivatives
  • Tyrosine / analysis
  • Tyrosine / metabolism

Substances

  • Affinity Labels
  • Antibodies, Monoclonal
  • Cross-Linking Reagents
  • Epitopes
  • Macromolecular Substances
  • Nerve Growth Factors
  • Proto-Oncogene Proteins
  • Receptors, Cell Surface
  • Receptors, Nerve Growth Factor
  • Phosphotyrosine
  • Tyrosine