Assembly and relaxation behaviours of phosphatidylethanolamine monolayers investigated by polarization and frequency resolved SFG-VS

Physical Chemistry Chemical Physics : PCCP
Feng WeiWanquan Zheng

Abstract

The assembly conformation and kinetics of phosphatidylethanolamine (PE) lipids are the key to their membrane curvatures and activities, such as exocytosis, endocytosis and Golgi membrane fusion. In the current study, a polarization and frequency resolved (bandwidth ≈ 1 cm(-1)) picosecond sum frequency generation (SFG) system was developed to characterize phosphatidylethanolamine monolayers. In addition to obtaining π-A isotherms and Brewster angle microscopy (BAM) images, the conformational changes and assembly behaviors of phosphatidylethanolamine molecules are investigated by analyzing the SFG spectra collected at various surface pressures (SPs). The compression kinetics and relaxation kinetics of phosphatidylethanolamine monolayers are also reported. The conformational changes of PE molecules during the monolayer compression are separated into several stages: reorientation of the head group PO2(-) in the beginning of the liquid-expanded (LE) phase, conformational changes of head group alkyl chains in the LE phase, and conformational changes of tail group alkyl chains in the LE-liquid condensed (LE-LC) phase. Such an understanding may help researchers to effectively control the lipid molecular conformation and membrane curvat...Continue Reading

References

Feb 15, 1987·Physical Review. B, Condensed Matter·X D ZhuY R Shen
Feb 24, 2001·Advances in Colloid and Interface Science·M Schalke, M Lösche
Jul 31, 2002·Biochemistry·Eve-Isabelle PécheurDick Hoekstra
Jul 19, 2005·Nature Materials·Frank W DelrioMartin L Dunn
Jun 28, 2006·Langmuir : the ACS Journal of Surfaces and Colloids·Sandra Gromelski, Gerald Brezesinski
Dec 13, 2006·Langmuir : the ACS Journal of Surfaces and Colloids·Gang Ma, Heather C Allen
Jan 11, 2007·Langmuir : the ACS Journal of Surfaces and Colloids·Gang Ma, Heather C Allen
Apr 6, 2007·Brain Research·Yoshiko UchiyamaAndrew G Ewing
Jun 21, 2007·Journal of the American Chemical Society·George W H WurpelMischa Bonn
Aug 19, 2007·Journal of the American Chemical Society·Maria SovagoMischa Bonn
Jan 26, 2008·Journal of the American Chemical Society·Igor V StiopkinAlexander V Benderskii
Aug 27, 2009·Proceedings of the National Academy of Sciences of the United States of America·C S Tian, Y R Shen
Dec 25, 2009·Langmuir : the ACS Journal of Surfaces and Colloids·Katarzyna CzaplaEwa Rogalska
Apr 17, 2010·Langmuir : the ACS Journal of Surfaces and Colloids·Peter J N KettPaul B Davies
Jul 10, 2010·The Journal of Physical Chemistry. B·Nadia N Casillas-ItuarteHeather C Allen
Jan 10, 2012·Biophysical Journal·Prajnaparamita DharJoseph A Zasadzinski
May 10, 2012·Accounts of Chemical Research·Lígia C Gomes-da-SilvaJoão N Moreira
Sep 11, 2012·Biochimica Et Biophysica Acta·Jean E Vance, Guergana Tasseva
May 21, 2013·The Journal of Physical Chemistry. B·Peter J N KettPaul B Davies
May 16, 2014·Accounts of Chemical Research·Martin LangeckerFriedrich C Simmel
Sep 18, 2014·Biophysical Journal·Hirak ChakrabortyBarry R Lentz
Feb 13, 2015·Proceedings of the National Academy of Sciences of the United States of America·Ian C Shieh, Joseph A Zasadzinski

❮ Previous
Next ❯

Related Concepts

Related Feeds

Basal Ganglia

Basal Ganglia are a group of subcortical nuclei in the brain associated with control of voluntary motor movements, procedural and habit learning, emotion, and cognition. Here is the latest research.