Reversible permeabilization of plasma membranes with an engineered switchable pore.

Abstract:

:By using an engineered, self-assembling, proteinaceous, 2-nm pore equipped with a metal-actuated switch, a technique to reversibly permeabilize the plasma membrane to small molecules (approximately 1000 Da) has been developed. We have demonstrated the dose-dependent permeabilization of fibroblasts by pores designed to be blocked and unblocked by the addition and removal of microM concentrations of Zn2+. Further, we have shown that the activity of the switch allows permeabilized cells to maintain viability and ultrastructural integrity following the unconstrained flux of small molecules. This ability to control the transmembrane influx and efflux of molecules and thereby vary the intracellular environment yet maintain cell viability will impact an array of biological and medical problems.

journal_name

Nat Biotechnol

journal_title

Nature biotechnology

authors

Russo MJ,Bayley H,Toner M

doi

10.1038/nbt0397-278

subject

Has Abstract

pub_date

1997-03-01 00:00:00

pages

278-82

issue

3

eissn

1087-0156

issn

1546-1696

journal_volume

15

pub_type

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