Cooperative protein transport in cellular organelles

Details Cooperative protein transport in cellular organelles Cooperative protein transport in cellular organelles

2011-03-31

arxiv.org/abs/1103.6111v1

Biology

Quantitative Biology

Subcellular Processes

9 pages, 5 figures

Scientific paper

Compartmentalization into biochemically distinct organelles constantly exchanging material is one of the hallmarks of eukaryotic cells. In the most naive picture of inter-organelle transport driven by concentration gradients, concentration differences between organelles should relax. We determine the conditions under which cooperative transport, i.e. based on molecular recognition, allows for the existence and maintenance of distinct organelle identities. Cooperative transport is also shown to control the flux of material transiting through a compartmentalized system, dramatically increasing the transit time under high incoming flux. By including chemical processing of the transported species, we show that this property provides a strong functional advantage to a system responsible for protein maturation and sorting.

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