Literature DB >> 10226146

The effects of level of expression of a jellyfish Shaker potassium channel: a positive potassium feedback mechanism.

N G Grigoriev1, J D Spafford, A N Spencer.   

Abstract

1. When jellyfish Shaker potassium channels (jShak2) are heterologously expressed in Xenopus oocytes at different levels they demonstrate density-dependent changes in electrical and kinetic properties of macroscopic currents. 2. The activation and inactivation properties of jShak2 channels depend on the extracellular potassium concentration. In this study we present experimental data which show that expression-dependent changes in kinetic and electrical properties of jShak2 macroscopic currents can be explained by the positive feedback effect of dynamic accumulation of K+ in the perimembranal space.

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Year:  1999        PMID： 10226146      PMCID： PMC2269314          DOI： 10.1111/j.1469-7793.1999.0025z.x

Source DB:  PubMed          Journal:  J Physiol        ISSN： 0022-3751            Impact factor:   5.182


  13 in total

1.  Modulation of synaptic transmitter release by repetitive postsynaptic action potentials.

Authors:  F F Weight; S D Erulkar
Journal:  Science       Date:  1976-09-10       Impact factor: 47.728

2.  Level of expression controls modes of gating of a K+ channel.

Authors:  O Moran; W Schreibmayer; L Weigl; N Dascal; I Lotan
Journal:  FEBS Lett       Date:  1992-05-04       Impact factor: 4.124

3.  Submicroscopic Ca2+ diffusion mediates inhibitory coupling between individual Ca2+ channels.

Authors:  J P Imredy; D T Yue
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4.  The after-effects of impulses in the giant nerve fibres of Loligo.

Authors:  B FRANKENHAEUSER; A L HODGKIN
Journal:  J Physiol       Date:  1956-02-28       Impact factor: 5.182

5.  TEA prevents inactivation while blocking open K+ channels in human T lymphocytes.

Authors:  S Grissmer; M Cahalan
Journal:  Biophys J       Date:  1989-01       Impact factor: 4.033

6.  Extracellular potassium ions mediate specific neuronal interaction.

Authors:  Y Yarom; M E Spira
Journal:  Science       Date:  1982-04-02       Impact factor: 47.728

7.  Potassium accumulation around individual purkinje cells in cerebellar slices from the guinea-pig.

Authors:  J Hounsgaard; C Nicholson
Journal:  J Physiol       Date:  1983-07       Impact factor: 5.182

8.  Significant potassium ion accumulation at the external surface of Myxicola giant axons.

Authors:  N Moran; E Levitan; Y Palti; P Roslansky; W J Adelman
Journal:  Biochim Biophys Acta       Date:  1985-03-14

9.  Different types of K+ channel current are generated by different levels of a single mRNA.

Authors:  E Honoré; B Attali; G Romey; F Lesage; J Barhanin; M Lazdunski
Journal:  EMBO J       Date:  1992-07       Impact factor: 11.598

10.  The polarized distribution of poly(A+)-mRNA-induced functional ion channels in the Xenopus oocyte plasma membrane is prevented by anticytoskeletal drugs.

Authors:  A B Peter; J C Schittny; V Niggli; H Reuter; E Sigel
Journal:  J Cell Biol       Date:  1991-08       Impact factor: 10.539
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  3 in total

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Authors:  Paola V Plazas; María J De Rosa; María E Gomez-Casati; Miguel Verbitsky; Noelia Weisstaub; Eleonora Katz; Cecilia Bouzat; Ana Belén Elgoyhen
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3.  Mechanism of Ba(2+) block of a mouse inwardly rectifying K+ channel: differential contribution by two discrete residues.

Authors:  N Alagem; M Dvir; E Reuveny
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  3 in total

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