6533b86ffe1ef96bd12ce918
RESEARCH PRODUCT
Regulation of the hDlg/hScrib/Hugl-1 tumour suppressor complex.
Susanne StrandPaola MassimiLawrence BanksDennis StrandMiranda ThomasNoor GammohNisha Narayansubject
SCRIBBlotting WesternBiologylaw.inventionCell LineSmall hairpin RNADiscs Large Homolog 1 ProteinlawSyntaxinAnimalsHumansSorbitolTransport VesiclesAdaptor Proteins Signal TransducingRegulation of gene expressionQa-SNARE ProteinsTumor Suppressor ProteinsOsmolar ConcentrationSignal transducing adaptor proteinMembrane ProteinsCell BiologyTransport proteinCell biologyVesicular transport proteinCytoskeletal ProteinsProtein TransportGene Expression RegulationMultiprotein ComplexesSuppressorRNA InterferenceSignal Transductiondescription
The proper function of the Scribble tumour suppressor complex is dependent upon the correct localisation of its components. Previously we observed dynamic relocalisation of the hDlg component under conditions of osmotic stress. We now show that the other two components of the complex, hScrib and Hugl-1 display similar patterns of expression. We demonstrate, by shRNA ablation of hScrib expression, that hDlg and Hugl-1 are in part dependent upon hScrib for their correct localization. However under conditions of osmotic stress this apparent dependency no longer exists: hDlg and Hugl-1 localise to cell membranes independently of hScrib. We also demonstrate an interaction between the three components of the hScrib complex and the tSNARE syntaxin 4, and show that correct localization of the Scrib complex is in part tSNARE dependent. This is the first detailed analysis of the co-localisation and function of the hScrib complex in mammalian cells and demonstrates a direct link between the control of the hScrib complex and vesicle transport pathways.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2008-11-01 | Experimental cell research |