Measuring raft size as a function of membrane composition in PC-based systems : Part 1--binary systems

This work applied two steady-state fluorescence techniques to detect nanoscopic membrane domains in a binary dimyristoylphosphocholine (DMPC)-cholesterol system and a ternary dioleoylphosphocholine (DOPC)-dipalmitoylphosphocholine (DPPC)-cholesterol system. A polarity-induced spectral shift in the e...

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Veröffentlicht in:Langmuir : the ACS journal of surfaces and colloids. - 1985. - 23(2007), 22 vom: 23. Okt., Seite 11180-7
1. Verfasser: Brown, Angela C (VerfasserIn)
Weitere Verfasser: Towles, Kevin B, Wrenn, Steven P
Format: Aufsatz
Sprache:English
Veröffentlicht: 2007
Zugriff auf das übergeordnete Werk:Langmuir : the ACS journal of surfaces and colloids
Schlagworte:Journal Article Research Support, N.I.H., Extramural Research Support, U.S. Gov't, Non-P.H.S. Fluorescent Dyes Lecithins Membranes, Artificial Phosphatidylcholines 1-O-(N-dansyl-11-amino-1-undecyl)-2-O-decanoylphosphatidylcholine 118790-13-9 1,2-Dipalmitoylphosphatidylcholine mehr... 2644-64-6 Cholesterol 97C5T2UQ7J 1,2-oleoylphosphatidylcholine EDS2L3ODLV Dimyristoylphosphatidylcholine U86ZGC74V5
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520 |a This work applied two steady-state fluorescence techniques to detect nanoscopic membrane domains in a binary dimyristoylphosphocholine (DMPC)-cholesterol system and a ternary dioleoylphosphocholine (DOPC)-dipalmitoylphosphocholine (DPPC)-cholesterol system. A polarity-induced spectral shift in the emission spectra of 1-myristoyl-2-[12-[(5-dimethylamino-1-naphthalenesulfonyl)amino]dodecanoyl]-sn-glycero-3-phosphocholine (DAN-PC) in combination with a Förster resonance energy transfer (FRET) assay agreed with the phase diagrams that have been published for these systems and were observed to be useful tools in the detection of membrane heterogeneities. The DAN-PC/dehydroergosterol (DHE) FRET pair was found to be best suited for use with these steady-state techniques because of their differential partitioning between phases, although a high acceptor concentration was needed to obtain accurate measurements. In the binary system, this high probe concentration was found to be perturbing, but in more representative ternary systems, the high probe concentration no longer disrupted the phase behavior of the system. This FRET pair allowed for the calculation of nanometer-scale domain sizes in model ternary systems, using the two steady-state fluorescence techniques along with a clear and straightforward model 
650 4 |a Journal Article 
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650 4 |a Research Support, U.S. Gov't, Non-P.H.S. 
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650 7 |a Dimyristoylphosphatidylcholine  |2 NLM 
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700 1 |a Towles, Kevin B  |e verfasserin  |4 aut 
700 1 |a Wrenn, Steven P  |e verfasserin  |4 aut 
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