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Selected Publication:

Moreno-Cencerrado, A; Tharad, S; Iturri, J; Promdonkoy, B; Krittanai, C; Toca-Herrera, JL.
(2016): Time influence on the interaction between Cyt2Aa2 and lipid/cholesterol bilayers
Microsc Res Tech. 2016; 79(11):1017-1023 FullText FullText_BOKU

Abstract:
Protein-membrane interactions are still an important topic of investigation. One of the suitable experimental techniques used by the scientific community to address such question is atomic force microscopy. In a previous work, we have reported that the binding mechanism between the cytolytic and antimicrobial protein (Cyt2Aa2) and lipid/cholesterol bilayers was concentrationdependent, leading to either the formation of holes in the bilayer or aggregates. Here we study such binding mechanism as a function of time at low protein concentrations (10 mg/mL). We demonstrate that although holes are formed during the first stages of the protein-lipid interaction, a reparation process due to molecular mobility in the bilayer leads to a homogenous and isotropic protein-lipid/cholesterol layer within 3 hr. The combination of imaging, force spectroscopy, and phase contrast delivered information about topography dynamics (molecular mobility), layer thickness, and mechanical properties of the protein-lipid/cholesterol system. These results highlight the importance of the observation time in (such type of) protein-lipid interactions (at low protein concentrations).
Authors BOKU Wien:
Iturri Jagoba
Moreno Cencerrado Alberto
Toca-Herrera José Luis

Find related publications in this database (Keywords)
atomic force microscopy
binding mechanism
cholesterol-lipid bilayer
cytolytic protein


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