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2015 ; 112
(51
): 15725-30
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Supramolecular structure in the membrane of Staphylococcus aureus
#MMPMID26644587
García-Lara J
; Weihs F
; Ma X
; Walker L
; Chaudhuri RR
; Kasturiarachchi J
; Crossley H
; Golestanian R
; Foster SJ
Proc Natl Acad Sci U S A
2015[Dec]; 112
(51
): 15725-30
PMID26644587
show ga
All life demands the temporal and spatial control of essential biological
functions. In bacteria, the recent discovery of coordinating elements provides a
framework to begin to explain cell growth and division. Here we present the
discovery of a supramolecular structure in the membrane of the coccal bacterium
Staphylococcus aureus, which leads to the formation of a large-scale pattern
across the entire cell body; this has been unveiled by studying the distribution
of essential proteins involved in lipid metabolism (PlsY and CdsA). The
organization is found to require MreD, which determines morphology in rod-shaped
cells. The distribution of protein complexes can be explained as a spontaneous
pattern formation arising from the competition between the energy cost of bending
that they impose on the membrane, their entropy of mixing, and the geometric
constraints in the system. Our results provide evidence for the existence of a
self-organized and nonpercolating molecular scaffold involving MreD as an
organizer for optimal cell function and growth based on the intrinsic
self-assembling properties of biological molecules.