A large conductance ion channel in the nuclear envelope of a higher plant cell.

Abstract:

:To detect and characterize ion channel activity in the nuclear envelope of a higher plant cell, we performed patch clamp experiments on nuclei isolated from coconut endosperm cells and on giant liposomes containing nuclear envelope fragments prepared from the same cells. An ion channel exhibiting a number of conductance substates, with a maximum of ca. 1,000 pS, was observed. Above an applied potential of +/- 100 mV, the behavior of the channel was similar in isolated nuclei and liposomes, indicating that both patch clamp modes were detecting the same channel. That such a channel has now been identified in members of both the animal and plant kingdoms reinforces the notion that the nuclear pores are not always open to ions.

journal_name

FEBS Lett

journal_title

FEBS letters

authors

Matzke AJ,Behensky C,Weiger T,Matzke MA

doi

10.1016/0014-5793(92)80290-w

keywords:

subject

Has Abstract

pub_date

1992-05-04 00:00:00

pages

81-5

issue

1

eissn

0014-5793

issn

1873-3468

pii

0014-5793(92)80290-W

journal_volume

302

pub_type

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