Publications

SK3 trafficking in hippocampal cells: the role of different molecular domains.  (2006)

Authors:
DECIMO I; RONCARATI R; GRASSO S; CLEMENS M; C. CHIAMULERA; FUMAGALLI G
Title:
SK3 trafficking in hippocampal cells: the role of different molecular domains.
Year:
2006
Type of item:
Articolo in Rivista
Tipologia ANVUR:
Articolo su rivista
Language:
Inglese
Format:
A Stampa
Referee:
Name of journal:
BIOSCIENCE REPORTS
ISSN of journal:
0144-8463
N° Volume:
26
:
Springer/Plenum Publishers, New York
Page numbers:
399-412
Keyword:
SK3; IPPOCAMPO; IMMUNOFLUORESCENZA
Short description of contents:
The regulative steps that control trafficking of ion channels are fundamental determinants of their qualitative and quantitative expression on the cell membrane. In this work the trafficking of the small conductance calcium-activated potassium channel, SK3 was studied in neurons in order to identify relevant molecular domains involved in this process. Hippocampal cell cultures were transfected with fusion proteins of green fluorescent protein (GFP) and different SK3 subunit truncations. The differential distribution of the mutants was analyzed by confocal microscopy and compared to the localization of the control fusion protein with full length SK3. The transport of chimeric proteins was quantified from fluorescence images by developing a morphometric analytical method. We found that the full length SK3 was distributed in cell body, axon and dendrites, whereas the deleted forms GFPDelta578-736 (deletion of the entire C-terminal domain), GFPDeltaCaMBD (deletion of the calmodulin-binding site) and GFPDeltaN (deletion of the N-terminal domain) were not transported into cell processes but accumulated in the cell body. The GFPDelta640-736 (deletion of the distal C-terminal domain) showed a distribution similar to control. The quantification and statistical analysis confirmed the differences in distribution across the three groups. In conclusion, the current work provides evidence for a fundamental role of the N-terminal domain and the calmodulin binding domain in SK3 trafficking in neurons.
Product ID:
36862
Handle IRIS:
11562/305875
Deposited On:
March 6, 2012
Last Modified:
December 4, 2019
Bibliographic citation:
DECIMO I; RONCARATI R; GRASSO S; CLEMENS M; C. CHIAMULERA; FUMAGALLI G, SK3 trafficking in hippocampal cells: the role of different molecular domains. «BIOSCIENCE REPORTS» , vol. 262006pp. 399-412

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