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Title: How nanoscale protein interactions determine the mesoscale dynamic organisation of bacterial outer membrane proteins

Journal Article · · Nature Communications
ORCiD logo [1];  [2];  [3]; ORCiD logo [4]; ORCiD logo [5]; ORCiD logo [2];  [6];  [7]; ORCiD logo [8]; ORCiD logo [2]; ORCiD logo [2]
  1. Univ. of Oxford (United Kingdom); Univ. de Toulouse, Toulouse (France)
  2. Univ. of Oxford (United Kingdom)
  3. Univ. of Oxford (United Kingdom); Univ. de Strasbourg, Illkirch (France)
  4. Univ. of Osnabrück, Osnabrück (Germany)
  5. Univ. of Oxford (United Kingdom); SEMMLE, Oxford (United Kingdom)
  6. Univ. of Oxford (United Kingdom); Radcliffe Observatory Quarter (550), Oxford (United Kingdom)
  7. Radcliffe Observatory Quarter (550), Oxford (United Kingdom)
  8. Univ. of Osnabrück, Barbarastraße (Osnabrück)

The spatiotemporal organisation of membranes is often characterised by the formation of large protein clusters. In Escherichia coli, outer membrane protein (OMP) clustering leads to OMP islands, the formation of which underpins OMP turnover and drives organisation across the cell envelope. Modelling how OMP islands form in order to understand their origin and outer membrane behaviour has been confounded by the inherent difficulties of simulating large numbers of OMPs over meaningful timescales. Here, we overcome these problems by training a mesoscale model incorporating thousands of OMPs on coarse-grained molecular dynamics simulations. We achieve simulations over timescales that allow direct comparison to experimental data of OMP behaviour. Here, we show that specific interaction surfaces between OMPs are key to the formation of OMP clusters, that OMP clusters present a mesh of moving barriers that confine newly inserted proteins within islands, and that mesoscale simulations recapitulate the restricted diffusion characteristics of OMPs.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE Laboratory Directed Research and Development (LDRD) Program
Grant/Contract Number:
89233218CNA000001
OSTI ID:
1570630
Report Number(s):
LA-UR-19-29545
Journal Information:
Nature Communications, Vol. 9, Issue 1; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 40 works
Citation information provided by
Web of Science

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Figures / Tables (8)