Organelle morphogenesis by active membrane remodeling.
|Title||Organelle morphogenesis by active membrane remodeling.|
|Publication Type||Journal Article|
|Year of Publication||2015|
|Authors||Ramakrishnan N, Ipsen JH, Rao M, Kumar PBSunil|
|Date Published||2015 Mar 28|
|Keywords||Intracellular Membranes, Membrane Fusion, Models, Biological, Models, Statistical, Monte Carlo Method, Organelles|
Intracellular organelles are subject to a steady flux of lipids and proteins through active, energy consuming transport processes. Active fission and fusion are promoted by GTPases, e.g., Arf-Coatamer and the Rab-Snare complexes, which both sense and generate local membrane curvature. Here we investigate, through Dynamical Triangulation Monte Carlo simulations, the role that these active processes play in determining the morphology and composition segregation in closed membranes. We find that the steady state shapes obtained as a result of such active processes, bear a striking resemblance to the ramified morphologies of organelles in vivo, pointing to the relevance of nonequilibrium fission-fusion in organelle morphogenesis.
|Alternate Journal||Soft Matter|