PMID- 23280106 OWN - NLM STAT- MEDLINE DCOM- 20130605 LR - 20231115 IS - 1557-7988 (Electronic) IS - 0076-6879 (Linking) VI - 519 DP - 2013 TI - FCS in STED microscopy: studying the nanoscale of lipid membrane dynamics. PG - 1-38 LID - B978-0-12-405539-1.00001-4 [pii] LID - 10.1016/B978-0-12-405539-1.00001-4 [doi] AB - Details of molecular membrane dynamics in living cells such as lipid-protein interactions or the incorporation of molecules into lipid "rafts" are often hidden to the observer because of the limited spatial resolution of conventional far-field optical microscopy. Fortunately, the superior spatial resolution of far-field stimulated-emission-depletion (STED) nanoscopy allows gaining new insights. Applying fluorescence correlation spectroscopy (FCS) in focal spots continuously tuned down to 30 nm in diameter distinguishes free from anomalous molecular diffusion due to transient binding, as for the diffusion of fluorescent phosphoglycero- and sphingolipid analogs in the plasma membrane of living cells. STED-FCS data recorded at different environmental conditions and on different lipid analogs reveal molecular details of the observed nanoscale trapping. Dependencies on the molecular structure of the lipids point to the distinct connectivity of the various lipids to initiate or assist cellular signaling events, but also outline strong differences to the characteristics of liquid-ordered and disordered phase separation in model membranes. STED-FCS is a highly sensitive and exceptional tool to study the membrane organization by introducing a new class of nanoscale biomolecular studies. CI - Copyright (c) 2013 Elsevier Inc. All rights reserved. FAU - Mueller, Veronika AU - Mueller V AD - Department of Nanobiophotonics, Max Planck Institute for Biophysical Chemistry, Gottingen, Germany. FAU - Honigmann, Alf AU - Honigmann A FAU - Ringemann, Christian AU - Ringemann C FAU - Medda, Rebecca AU - Medda R FAU - Schwarzmann, Gunter AU - Schwarzmann G FAU - Eggeling, Christian AU - Eggeling C LA - eng GR - MC_UU_12010/9/MRC_/Medical Research Council/United Kingdom GR - MR/K01577X/1/MRC_/Medical Research Council/United Kingdom PT - Journal Article PL - United States TA - Methods Enzymol JT - Methods in enzymology JID - 0212271 RN - 0 (Fluorescent Dyes) SB - IM MH - Diffusion MH - Fluorescent Dyes MH - *Membrane Microdomains MH - Spectrometry, Fluorescence/*methods EDAT- 2013/01/03 06:00 MHDA- 2013/06/06 06:00 CRDT- 2013/01/03 06:00 PHST- 2013/01/03 06:00 [entrez] PHST- 2013/01/03 06:00 [pubmed] PHST- 2013/06/06 06:00 [medline] AID - B978-0-12-405539-1.00001-4 [pii] AID - 10.1016/B978-0-12-405539-1.00001-4 [doi] PST - ppublish SO - Methods Enzymol. 2013;519:1-38. doi: 10.1016/B978-0-12-405539-1.00001-4.