Protein–protein interactions involving voltage-gated sodium channels: Post-translational regulation, intracellular trafficking and functional expression
| Autor: | Mustafa B.A. Djamgoz, Kenji Okuse, Dongmin Shao |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
chemistry.chemical_classification
Calmodulin Sodium channel Molecular Sequence Data Intracellular Space Cell Biology Endoplasmic-reticulum-associated protein degradation Sudden infant death syndrome Biology Endoplasmic Reticulum Biochemistry Sodium Channels Cell biology Protein Transport chemistry biology.protein Animals Humans Ankyrin Post-translational regulation Amino Acid Sequence Protein Processing Post-Translational Intracellular Protein Binding Syntrophin |
| Zdroj: | The International Journal of Biochemistry & Cell Biology. 41:1471-1481 |
| ISSN: | 1357-2725 |
| DOI: | 10.1016/j.biocel.2009.01.016 |
| Popis: | Voltage-gated sodium channels (VGSCs), classically known to play a central role in excitability and signalling in nerves and muscles, have also been found to be expressed in a range of ‘non-excitable’ cells, including lymphocytes, fibroblasts and endothelia. VGSC abnormalities are associated with various diseases including epilepsy, long-QT syndrome 3, Brugada syndrome, sudden infant death syndrome and, more recently, various human cancers. Given their pivotal role in a wide range of physiological and pathophysiological processes, regulation of functional VGSC expression has been the subject of intense study. An emerging theme is post-translational regulation and macro-molecular complexing by protein–protein interactions and intracellular trafficking, leading to changes in functional VGSC expression in plasma membrane. This partially involves endoplasmic reticulum associated degradation and ubiquitin–proteasome system. Several proteins have been shown to associate with VGSCs. Here, we review the interactions involving VGSCs and the following proteins: p11, ankyrin, syntrophin, β-subunit of VGSC, papin, ERM and Nedd4 proteins. Protein kinases A and C, as well as Ca 2+ -calmodulin dependant kinase II that have also been shown to regulate intracellular trafficking of VGSCs by changing the balance of externalization vs. internalization, and an effort is made to separate these effects from the short-term phosphorylation of mature proteins in plasma membrane. Two further modulatory mechanisms are reciprocal interactions with the cytoskeleton and, late-stage, activity-dependant regulation. Thus, the review gives an updated account of the range of post-translational molecular mechanisms regulating functional VGSC expression. However, many details of VGSC subtype-specific regulation and pathophysiological aspects remain unknown and these are highlighted throughout for completeness. |
| Databáze: | OpenAIRE |
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