LEVEL OF EXPRESSION IN, XENOPUS OOCYTES AFFECTS SOME CHARACTERISTICS OF A PLANT INWARD-RECTIFYING VOLTAGE-GATED K+ CHANNEL

被引：43

作者：

VERY, AA ^{[1
]}

BOSSEUX, C ^{[1
]}

GAYMARD, F ^{[1
]}

SENTENAC, H ^{[1
]}

THIBAUD, JB ^{[1
]}

机构：

[1] ENSAM,INRA,BIOCHIM & PHYSIOL VEGETALES LAB,CNRS,URA 573,F-34060 MONTPELLIER 1,FRANCE

来源：

PFLUGERS ARCHIV-EUROPEAN JOURNAL OF PHYSIOLOGY | 1994年 / 428卷 / 3-4期

关键词：

POTASSIUM CHANNELS; ARABIDOPSIS THALIANA; XENOPUS OOCYTES; ACTIVATION KINETICS; CESIUM BLOCKADE;

D O I：

10.1007/BF00724528

中图分类号：

Q4 [生理学];

学科分类号：

071003 ;

摘要：

The plant K+ channel KAT1 shows some similarity to animal voltage-gated channels of the Shaker superfamily. Contrary to these animal counterparts, this plant channel is inwardly rectifying, being gated upon hyperpolarization. Different levels of expression of KAT1 in Xenopus oocytes could be obtained by increasing the amount of injected cRNA. The resulting KAT1 gating and sensitivity to external caesium were significantly changed. Similar findings have been published regarding animal voltage-gated channels. The present data show that plant channels may also undergo modification of their activity upon modification of their level of expression.

引用

页码：422 / 424

页数：3

共 8 条

[1] FUNCTIONAL EXPRESSION OF A PROBABLE ARABIDOPSIS-THALIANA POTASSIUM CHANNEL IN SACCHAROMYCES-CEREVISIAE [J].

ANDERSON, JA ;

HUPRIKAR, SS ;

KOCHIAN, LV ;

LUCAS, WJ ;

GABER, RF .

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 1992, 89 (09) :3736-3740

[2]

HILLE B, 1992, IONIC CHANNELS EXCIT

[3] DIFFERENT TYPES OF K+ CHANNEL CURRENT ARE GENERATED BY DIFFERENT LEVELS OF A SINGLE MESSENGER-RNA [J].

HONORE, E ;

ATTALI, B ;

ROMEY, G ;

LESAGE, F ;

BARHANIN, J ;

LAZDUNSKI, M .

EMBO JOURNAL, 1992, 11 (07) :2465-2471

[4] POTASSIUM CHANNELS CLONED FROM NEUROBLASTOMA-CELLS DISPLAY SLOWLY INACTIVATING OUTWARD CURRENTS IN XENOPUS OOCYTES [J].

ITO, Y ;

YOKOYAMA, S ;

HIGASHIDA, H .

PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES, 1992, 248 (1322) :95-101

[5] LEVEL OF EXPRESSION CONTROLS MODES OF GATING OF A K+ CHANNEL [J].

MORAN, O ;

SCHREIBMAYER, W ;

WEIGL, L ;

DASCAL, N ;

LOTAN, I .

FEBS LETTERS, 1992, 302 (01) :21-25

[6] EXPRESSION OF AN INWARD-RECTIFYING POTASSIUM CHANNEL BY THE ARABIDOPSIS KAT1 CDNA [J].

SCHACHTMAN, DP ;

SCHROEDER, JI ;

LUCAS, WJ ;

ANDERSON, JA ;

GABER, RF .

SCIENCE, 1992, 258 (5088) :1654-1658

[7] CLONING AND EXPRESSION IN YEAST OF A PLANT POTASSIUM-ION TRANSPORT-SYSTEM [J].

SENTENAC, H ;

BONNEAUD, N ;

MINET, M ;

LACROUTE, F ;

SALMON, JM ;

GAYMARD, F ;

GRIGNON, C .

SCIENCE, 1992, 256 (5057) :663-665

[8] PLANT ION CHANNELS - WHOLE-CELL AND SINGLE-CHANNEL STUDIES [J].

TESTER, M .

NEW PHYTOLOGIST, 1990, 114 (03) :305-340

← 1 →