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Beyond the RING: CBL proteins as multivalent adapters

A Y Tsygankov1, A M Teckchandani, E A Feshchenko

  • 1Department of Microbiology and Immunology, Temple University School of Medicine, Philadelphia, Pennsylvania, PA 19140, USA. tsygan@astro.temple.edu

Oncogene
|October 19, 2001
PubMed

Insights

The Cbl protein family acts as crucial cell signaling adapters and inhibitors of protein tyrosine kinases. Their E3 ubiquitin-ligase activity is key to these functions, impacting various biological processes.

Area of Science:

  • Cellular Biology
  • Molecular Biology
  • Biochemistry

Background:

  • Discovery of c-Cbl, a cellular homolog of v-Cbl, revealed a family of related proteins.
  • Cbl proteins interact with diverse signaling molecules, including protein tyrosine kinases and molecular adapters.

Purpose of the Study:

  • To review the functional roles of Cbl proteins.
  • To highlight their significance as multivalent adapters and inhibitors of protein tyrosine kinases.
  • To emphasize the role of E3 ubiquitin-ligase activity in Cbl protein function.

Main Methods:

  • Literature review of experimental evidence.
  • Analysis of Cbl protein interactions.
  • Examination of E3 ubiquitin-ligase activity.

Main Results:

  • Cbl proteins function as multivalent adapters in cell signaling pathways.
  • They act as inhibitors of various protein tyrosine kinases.
  • E3 ubiquitin-ligase activity is substantially linked to their inhibitory function.

Conclusions:

  • Cbl proteins are versatile regulators of cell signaling.
  • Their adapter functions are central to their biological roles.
  • Understanding Cbl proteins is crucial for comprehending cell signaling networks.

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