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Endocytosis-dominated membrane area decrease requires rab5 protein in rat melanotrophsSedej, Simon, 1974- ; Rupnik, Marjan ; Zorec, RobertEukaryotic cells internalize extracellular macromolecules by endocytosis and it was shown that Rab5 protein is required for this process. While it is clearthat endocytosis consists of vesicle fission ... from the plasma membrane, the role of Rab5 protein in the plasma membrane surface area changes is still unclear. Here we studied whether Rab5 is required for membrane surface area changes in rat melanotrophs-cells deriving from the pituitary pars intermedia.The presence of this protein in melanotrophs was probed by immunocytochemistry and its putative role in membrane area dynamics was monitored electrophysiologically with membrane capacitance measurements as this parameter directly reflects changes in membrane surface area. We found that Rab5 protein exists in melanotrophs. At [Ca(2+)](i) < [micro]M, endocytosis-dominated membrane capacitance decrease was found to be blocked by microinjection of specific Rab5 antibody. At high [Ca(2+)](i), Rab5 antibodydid not affect the steady-state increase in membrane capacitance, while it elevated the rate of membrane capacitance increase, which is consistent with an inhibition of endocytosis.Source: Annals of the New York Academy of Sciences. - ISSN 0077-8923 (Vol. 1048, 2005, str. 272-280)Type of material - article, component part ; adult, seriousPublish date - 2005Language - englishCOBISS.SI-ID - 2086975
Author
Sedej, Simon, 1974- |
Rupnik, Marjan |
Zorec, Robert
Topics
Melanotropin |
Endocytosis |
rab GTP-binding proteins |
Rats
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source: Annals of the New York Academy of Sciences. - ISSN 0077-8923 (Vol. 1048, 2005, str. 272-280)
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Sedej, Simon, 1974- | 20340 |
Rupnik, Marjan | 12266 |
Zorec, Robert | 03702 |
Source: Personal bibliographies
and: SICRIS
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