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- W2055324119 abstract "The c-cbl protooncogene was first identified as the cellular homologue of a viral oncogene v-cbl that induces pre-B lymphomas and myeloid leukemias in mice. Until recently, the biochemical basis for Cbl's transforming potential and its physiological role remained unclear. However, a convergence of biochemical studies in mammalian cells and genetic studies in C. elegans and Drosophila has now identified Cbl as a negative regulator of tyrosine kinase signaling. The N-terminal transforming region of Cbl (Cbl-N) and an adjacent RING finger domain are the elements most conserved during evolution. The Cbl-N region has now been shown to contain a novel phosphotyrosine-binding (PTB) domain that directly interacts with autophosphorylated tyrosine kinases via a D(N/D)XpY motif. A critical role of the PTB domain in Cbl function is demonstrated by the localization of a loss-of-function mutation in C. elegans Cbl homologue SLI-1 within this region. The corresponding mutation in human Cbl inactivates the PTB domain function and abrogates Cbl-mediated regulation of tyrosine kinase function. Recent studies have also identified a novel signaling pathway initiated by the interaction of mammalian Cbl proteins with the SH2 domains of Crk adaptor molecules, which results in Cbl's linkage with C3G, a guanine nucleotide exchange protein for Rap1 family of small G-proteins. Presently, Rap1 is thought to antagonize Ras function, although Rap1-specific targets have emerged recently. Thus, recent advances have firmly placed the little known protooncoprotein Cbl on the center stage of tyrosine kinase-mediated signal transduction." @default.
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- W2055324119 date "1997-01-01" @default.
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- W2055324119 title "The Cbl Protooncogene Product: From an Enigmatic Oncogene to Center Stage of Signal Transduction" @default.
- W2055324119 doi "https://doi.org/10.1615/critrevoncog.v8.i2-3.30" @default.
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