Laura J. Taylor

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The protein encoded by the retinoblastoma susceptibility gene (Rb) functions as a tumour suppressor and negative growth regulator. As actively growing cells require the ongoing synthesis of ribosomal RNA, we considered that Rb might interact with the ribosomal DNA transcription apparatus. Here we report that (1) there is an accumulation of Rb protein in the(More)
Ras proteins play a central role in transducing signals that control cell proliferation, differentiation, motility, and survival. The location-specific signaling activity of Ras has been previously shown to be regulated by ubiquitination [1]. However, the molecular machinery that controls Ras ubiquitination has not been defined. Here we demonstrate through(More)
Ligand-induced activation of the epidermal growth factor receptor (EGFR) initiates multiple signal-transduction pathways as well as trafficking events that relocalize the receptors from the cell surface to intracellular endocytic compartments. Although there is growing awareness that endocytic transport can play a direct role in signal specification,(More)
Mammalian cells contain three closely related ras genes, H-ras, K-ras and N-ras. Although in a given tumour type, oncogenic mutations are selectively observed in only one of the ras genes, the acquisition of the transformed phenotype has been shown to require the contribution of the normal products of the other ras genes. Here we demonstrate that oncogenic(More)
Androgen-dependent growth of prostate tissue has been well documented. An additional prerequisite for cellular growth is the accumulation of ribosomes. It is thus reasonable to hypothesize that ribosomal DNA (rDNA) transcription in prostate tissue must be stimulated by androgen either directly or indirectly. This hypothesis was tested using both LNCaP(More)
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