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      Annexins--modulators of EGF receptor signalling and trafficking.

      Cellular Signalling
      Animals, Annexins, metabolism, Endosomes, Humans, Protein Transport, Receptor, Epidermal Growth Factor, Signal Transduction, ras Proteins

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          Abstract

          At the cell surface, activation of the epidermal growth factor (EGF) receptor triggers a complex network of signalling events that regulate a variety of cellular processes. For signal termination, the activated EGF receptor is internalised and targeted to lysosomes for degradation. Microdomain localization at the plasma membrane and endocytic transport of the EGFR is important for the formation of compartment-specific signalling complexes and is regulated by scaffolding and targeting proteins. This includes Ca2+-effector proteins, such as calmodulin and annexins (Anx), in particular AnxA1, AnxA2, AnxA6 and as shown recently,AnxA8. Given that these annexins show differences in their expression patterns, subcellular localization and mode of action, they are likely to differentially contribute and cooperate in the fine-tuning of EGFR activity. In support of this hypothesis, current literature suggests these annexins to be involved in different steps that control the endocytic transport and signalling of the EGF receptor. This review summarizes how the coordinated activity of AnxA1, AnxA2, AnxA6 and AnxA8 can contribute to regulate EGF receptor localization and activity.

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          Author and article information

          Journal
          19385045
          10.1016/j.cellsig.2009.01.031

          Chemistry
          Animals,Annexins,metabolism,Endosomes,Humans,Protein Transport,Receptor, Epidermal Growth Factor,Signal Transduction,ras Proteins

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