Line tension and stability of domains in cell-adhesion zones mediated by long and short receptor-ligand complexes.

Line tension and stability of domains in cell-adhesion zones mediated by long and short receptor-ligand complexes.
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DOI:
10.1371/journal.pone.0023284
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发表时间:
2011
期刊:
影响因子:
3.7
通讯作者:
Weikl TR
Weikl TR
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Krobath H;Różycki B;Lipowsky R;Weikl TR

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Submicron scale domains of membrane-anchored receptors play an important role in cell signaling. Central questions concern the stability of these microdomains, and the mechanisms leading to the domain formation. In immune-cell adhesion zones, microdomains of short receptor-ligand complexes form next to domains of significantly longer receptor-ligand complexes. The length mismatch between the receptor-ligand complexes leads to membrane deformations and has been suggested as a possible cause of the domain formation. The domain formation is a nucleation and growth process that depends on the line tension and free energy of the domains. Using a combination of analytical calculations and Monte Carlo simulations, we derive here general expressions for the line tension between domains of long and short receptor-ligand complexes and for the adhesion free energy of the domains. We argue that the length mismatch of receptor-ligand complexes alone is sufficient to drive the domain formation, and obtain submicron-scale minimum sizes for stable domains that are consistent with the domain sizes observed during immune-cell adhesion.
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