Effect of apolar lipids on archaeal membranes containing charged headgroups
Many archaea are known to live under high temperature conditions (>85C) and therefore must have specially adapted membranes in order to survive under these conditions. One adaptation strategy found in archaea is the production of monolayer forming tetraether lipids, however not all archaea living at high temperature produce these lipids. Therefore other mechanisms of adaptation must exist. Recently it has been proposed that the presence of apolar lipids, such as squalane, sit that the midplane of the membrane bilayer and provide an alternative mechanism for adaptation to high temperature. In this work we hope study the structure of a model archaeal membranes containing phosphoserine (PS) and phosphoglycerol (PG) headgroups which are commonly found in archaea as a function of temperature. Preliminary results demonstrate that the PS and PG lipids have a lesser ability to self-organize than phosphocholine (PC) containing lipids and that apolar lipids may be required in this lipid system to obtain stable and structured membrane bilayers.
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LORICCO Josephine; CRISTIGLIO Viviana; DEME Bruno; Phil Oger and PETERS Judith. (2021). Effect of apolar lipids on archaeal membranes containing charged headgroups. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.8-02-973
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