CSF-1 stimulated multiubiquitination of the CSF-1 receptor and of Cbl follows their tyrosine phosphorylation and association with other signaling proteins

Yun Wang, Yee Guide Yeung, E. Richard Stanley

Research output: Contribution to journalArticle

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Abstract

Addition of colony stimulating factor-1 (CSF-1) to macrophages stimulates the rapid, transient tyrosine phosphorylation, membrane association and multiubiquitination of Cbl (Wang et al. [1996] J. Biol. Chem. 271:17-20). Kinetic analysis reveals that the tyrosine phosphorylation of Cbl is coincident with its plasma membrane translocation and association with the activated tyrosine phosphorylated CSF-1R, p85, Grb2, and tyrosine phosphorylated p58Shc and that these events precede the simultaneous multiubiquitination of Cbl and the CSF-1R. Tyrosine phosphorylation and multiubiquitination of the cell surface CSF-1R are stoichiometric and the multiubiquitinated CSF-1R is degraded. Similarly, the membrane associated Cbl is almost stoichiometrically ubiquitinated, but the ubiquitinated Cbl is not degraded, being recovered, deubiquitinated, in the cytosol 3-10 min after stimulation at 37°C. In the membrane fraction of cells stimulated at 4°C, the association of p58Shc and Grb2 with Cbl is stable, whereas its association with Sos and p85 is transient and their dissociation occurs at the time CSF-1R and Cbl multiubiquitination commence. The membrane translocation and the pattern of association of Sos with the CSF-1R, p85, Grb2, and p58Shc resemble those of Cbl but Sos is not tyrosine phosphorylated, nor multiubiquitinated and the coprecipitation of these proteins, other than Grb2, with Sos is much less. Complexes formed by Sos and Cbl are largely independent and membrane complexes of Cbl with other tyrosine phosphorylated proteins, p85 and Grb2 also contain CSF-1R. These data raise the possibility that the predicted negative regulatory role of Cbl in macrophages is its enhancement of ligand-induced CSF-1R internalization/degradation.

Original languageEnglish (US)
Pages (from-to)119-134
Number of pages16
JournalJournal of Cellular Biochemistry
Volume72
Issue number1
DOIs
StatePublished - Jan 1 1999

Fingerprint

Colony-Stimulating Factor Receptors
Phosphorylation
Macrophage Colony-Stimulating Factor
Tyrosine
Association reactions
Membranes
Proteins
Macrophages
Cell Membrane
Cell membranes
Coprecipitation
Cytosol
Ligands
Degradation
Kinetics

Keywords

  • Cbl
  • Colony stimulating factor-1
  • Multiubiquitination
  • Receptor tyrosine kinase
  • Signal transduction

ASJC Scopus subject areas

  • Biochemistry
  • Cell Biology

Cite this

CSF-1 stimulated multiubiquitination of the CSF-1 receptor and of Cbl follows their tyrosine phosphorylation and association with other signaling proteins. / Wang, Yun; Yeung, Yee Guide; Stanley, E. Richard.

In: Journal of Cellular Biochemistry, Vol. 72, No. 1, 01.01.1999, p. 119-134.

Research output: Contribution to journalArticle

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