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DOI | 10.1002/JCP.21900 | ||||
Año | 2009 | ||||
Tipo | artículo de investigación |
Citas Totales
Autores Afiliación Chile
Instituciones Chile
% Participación
Internacional
Autores
Afiliación Extranjera
Instituciones
Extranjeras
ClC-2 chloride channel is present in the brain and some transporting epithelia where its function is poorly understood. We have now demonstrated that the surface channels are rapidly internalised and approximately the 70% of the surface membrane protein recycles after 4- to 8-min internalisation. Endocytosis of ClC-2 was dependent upon tyrosine 179 located within an endocytic motif. Rapid recycling accompanied by an even faster internalisation could account for the abundant presence of ClC-2 in intracellular membranous structures. At least a proportion of ClC-2 resides in lipid rafts. Use of beta-cyclodextrin led to an increase in cell surface channel, but, surprisingly, a decrease in functionally active channels. We suggest that ClC-2 requires residing in beta-cyclodextrin sensitive clusters with other molecules in order to remain active. Regulation of ClC-2 trafficking to and within the membrane could be a means of modulating its activity. Cell. Physiol. 221: 650-657, 2009. (C) 2009 Wiley-Liss, Inc.
Ord. | Autor | Género | Institución - País |
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1 | Cornejo, Isabel | Mujer |
Centro de Estudios Científicos - Chile
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2 | NIEMEYER-MARICH, MARIA ISABEL | Mujer |
Centro de Estudios Científicos - Chile
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3 | Zuniga, Leandro | Hombre |
Centro de Estudios Científicos - Chile
Pritzker School of Medicine - Estados Unidos |
4 | Yusef, Yamil R. | - |
Centro de Estudios Científicos - Chile
Royal College of Surgeons in Ireland (RCSI) - Irlanda Royal College of Surgeons in Ireland - Irlanda |
5 | SEPULVEDA-VALENZUELA, FRANCISCO LEANDRO | Hombre |
Centro de Estudios Científicos - Chile
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6 | CID-SOTO, LUIS PABLO | Hombre |
Centro de Estudios Científicos - Chile
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Fuente |
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FONDECYT |
CONICYT |
MECESUP |
Gobierno Regional de Los Ríos |
Telefónica del Sur |
Arauco |
Empresas CMPC |
Antofagasta Minerals |
Indura |
Naviera Ultragas |
UACH DID |
Chilean Government through the Millennium Science Initiative and the Centers of Excellence Base Financing Program of Conicyt |
Agradecimiento |
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This study was supported by Fondecyt grant 1070722 and by UACh DID, Conicyt and MECESUP Doctoral grants. The Centro de Estudios Cientificos (CECS) is funded by the Chilean Government through the Millennium Science Initiative and the Centers of Excellence Base Financing Program of Conicyt. CECS is also supported by a group of private companies which at present includes Antofagasta Minerals, Arauco, Empresas CMPC, Indura, Naviera Ultragas and Telefonica del Sur. CIN is funded by Conicyt and the Gobierno Regional de Los Rios. We are grateful to Marcela Bravo-Zehnder and Steffen Hartel for help and advice, and Carlos B. Gonzalez for providing laboratory facilities. |