Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/49301
COMPARTIR / EXPORTAR:
SHARE CORE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Título: | Calcium entry-calcium refilling (CECR) coupling between store-operated Ca2+ entry and sarco/endoplasmic reticulum Ca2+-ATPase |
Autor: | Manjarrés, Isabel M. CSIC; Alonso, María Teresa; García-Sancho, Javier CSIC ORCID | Palabras clave: | Calcium signaling Calcium microdomains STIM1 Endoplasmic reticulum Aequorin Chemiluminescence |
Fecha de publicación: | mar-2011 | Editor: | Elsevier | Citación: | Cell Calcium 49(3): 153-161 (2011) | Resumen: | Cross-talk between subcellular organelles is essential for cellular Ca2+ homeostasis. We have studied the effects of knocking down STIM1, the Ca2+ sensor of the endoplasmic reticulum (ER), on several homeostatic Ca2+-handling mechanisms, including plasma membrane Ca2+ entry and transport by ER, mitochondria and nucleus. We have used targeted aequorins to selectively measure calcium fluxes in different organelles. Actions of STIM1 were extremely selective, restricted to store operated Ca2+ channels (SOC) and Ca2+ uptake by the ER. No interactions with uptake or release of Ca2+ by mitochondria or nucleus were detected. Ca2+ exit from the ER, including passive leak, release via inositol 1,4,5-trisphosphate and ryanodine receptors, was unaffected. STIM1 knock-down inhibited ER Ca2+ uptake in intact but not in permeabilized cells, suggesting a privileged calcium entry-calcium refilling (CECR) coupling between plasma membrane SOC and ER calcium pump in the intact cell. As a result a large part of the entering Ca2+ is taken up into the ER without reaching the bulk cytosol. The tightness of CECR, as measured by the slope of the stimulus-signal strength function, was comparable to classic excitation–response coupling mechanisms, such as excitation–contraction, excitation–secretion or excitation–transcription coupling. | Descripción: | 9 páginas, 9 figuras, 1 tabla.-- El pdf del es la versión pre-print del artículo. | Versión del editor: | http://dx.doi.org/10.1016/j.ceca.2011.01.007 | URI: | http://hdl.handle.net/10261/49301 | DOI: | 10.1016/j.ceca.2011.01.007 | ISSN: | 0143-4160 |
Aparece en las colecciones: | (IBGM) Artículos |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
---|---|---|---|---|
Calcium Entry-Calcium.pdf | 1,43 MB | Adobe PDF | Visualizar/Abrir |
CORE Recommender
SCOPUSTM
Citations
39
checked on 25-abr-2024
WEB OF SCIENCETM
Citations
36
checked on 24-feb-2024
Page view(s)
436
checked on 22-abr-2024
Download(s)
448
checked on 22-abr-2024
Google ScholarTM
Check
Altmetric
Altmetric
NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.