On multivalent receptor activity of GM1 in cholesterol containing membranes

Šachl, Radek; Amaro, Mariana; Aydogan, Gokcan; Koukalová, Alena; Mikhaylov, I. I.; Boldyrev, I. A.; Humpolíčková, Jana; Hof, Martin

doi:https://dx.doi.org/10.1016/j.bbamcr.2014.07.016

Number of the records: 1

On multivalent receptor activity of GM1 in cholesterol containing membranes

1.

SYSNO ASEP	0436776
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	On multivalent receptor activity of GM1 in cholesterol containing membranes
Author(s)	Šachl, Radek (UFCH-W)_{RID, ORCID} Amaro, Mariana (UFCH-W)_{RID, ORCID} Aydogan, Gokcan (UFCH-W) Koukalová, Alena (UFCH-W)_RID Mikhaylov, I. I. (RU) Boldyrev, I. A. (RU) Humpolíčková, Jana (UFCH-W)_RID Hof, Martin (UFCH-W)_{RID, ORCID}
Source Title	Biochimica Et Biophysica Acta-Molecular Cell Research. - : Elsevier - ISSN 0167-4889 Roč. 1853, č. 4 (2015), s. 850-857
Number of pages	8 s.
Language	eng - English
Country	US - United States
Keywords	Gangliosides ; Cholera toxin ; Fluorescence correlation spectroscopy
Subject RIV	CF - Physical ; Theoretical Chemistry
R&D Projects	GC14-03141J GA ČR - Czech Science Foundation (CSF)
	LH13259 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
Institutional support	UFCH-W - RVO:61388955
UT WOS	000350935600011
EID SCOPUS	84923123705
DOI	10.1016/j.bbamcr.2014.07.016
Annotation	Gangliosides located at the outer leaflet of plasma membrane aremolecules that either participate in recognizing of exogenous ligandmolecules or exhibit their own receptor activity,which are both essential phenomena for cell communication and signaling aswell as for virus and toxin entry. Regulatorymechanisms of lipid-mediated recognition are primarily subjected to the physical status of the membrane in close vicinity of the receptor. Concerning the multivalent receptor activity of the ganglioside GM1, several regulatory strategies dealing with GM1 clustering and cholesterol involvement have been proposed. So far however, merely the isolated issues were addressed and no interplay between them investigated. In this work, several advanced fluorescence techniques such as Z-scan fluorescence correlation spectroscopy, Förster resonance energy transfer combined with Monte Carlo simulations, and a newly developed fluorescence antibunching assay were employed to give a more complex portrait of clustering and cholesterol involvement in multivalent ligand recognition of GM1. Our results indicate that membrane properties have an impact on a fraction of GM1 molecules that is not available for the ligand binding. While at low GM1 densities (~1 %) it is the cholesterol that turns GM1 headgroups invisible, at higher GM1 level (~4 %) it is purely the local density of GM1molecules that inhibits the recognition. At mediumGM1 content, cooperation of the two phenomena occurs. This article is part of a Special Issue entitled: Nanoscale membrane orgainisation and signalling.
Workplace	J. Heyrovsky Institute of Physical Chemistry
Contact	Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196
Year of Publishing	2016

Number of the records: 1