Diffusive exit rates through pores in membrane-enclosed structures
Diffusive exit rates through pores in membrane-enclosed structures
复制标题
通过膜封闭结构中的孔的扩散出口率
DOI:
10.1088/1478-3975/acb1ea
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发表时间:
2023
期刊:
影响因子:
2
通讯作者:
Koslover, Elena F.
中科院分区:
文献类型:
--
作者:
Yang, Zitao;Koslover, Elena F.
The function of many membrane-enclosed intracellular structures relies on release of diffusing particles that exit through narrow pores or channels in the membrane. The rate of release varies with pore size, density, and length of the channel. We propose a simple approximate model, validated with stochastic simulations, for estimating the effective release rate from cylinders, and other simple-shaped domains, as a function of channel parameters. The results demonstrate that, for very small pores, a low density of channels scattered over the boundary is sufficient to achieve substantial rates of particle release. Furthermore, we show that increasing the length of passive channels will both reduce release rates and lead to a less steep dependence on channel density. Our results are compared to previously-measured local calcium release rates from tubules of the endoplasmic reticulum, providing an estimate of the relevant channel density responsible for the observed calcium efflux.
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DOI:
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DOI:
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2021
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DOI:
--
发表时间:
2021
期刊:
bioRxiv
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