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Science 9 July 1993:
Vol. 261. no. 5118, pp. 221 - 224
DOI: 10.1126/science.7687074

Articles

Science, Vol 261, Issue 5118, 221-224
Copyright © 1993 by American Association for the Advancement of Science


articles

mSlo, a complex mouse gene encoding "maxi" calcium-activated potassium channels

A Butler, S Tsunoda, DP McCobb, A Wei, and L Salkoff

Department of Anatomy and Neurobiology, Washington University School of Medicine, St. Louis, MO 63110.

Complementary DNAs (cDNAs) from mSlo, a gene encoding calcium-activated potassium channels, were isolated from mouse brain and skeletal muscle, sequenced, and expressed in Xenopus oocytes. The mSlo-encoded channel resembled "maxi" or BK (high conductance) channel types; single channel conductance was 272 picosiemens with symmetrical potassium concentrations. Whole cell and single channel currents were blocked by charybdotoxin, iberiotoxin, and tetraethylammonium ion. A large number of variant mSlo cDNAs were isolated, indicating that several diverse mammalian BK channel types are produced by a single gene.


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Endothelial K+ channel lacks the Ca2+ sensitivity-regulating {beta} subunit.
J. PAPASSOTIRIOU, R. KÖHLER, J. PRENEN, H. KRAUSE, M. AKBAR, J. EGGERMONT, M. PAUL, A. DISTLER, B. NILIUS, and J. HOYER (2000)
FASEB J 14, 885-894
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beta Subunits Modulate Alternatively Spliced, Large Conductance, Calcium-Activated Potassium Channels of Avian Hair Cells.
K. Ramanathan, T. H. Michael, and P. A. Fuchs (2000)
J. Neurosci. 20, 1675-1684
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Molecular Cloning and Characterization of the Intermediate-Conductance Ca2+-Activated K+ Channel in Vascular Smooth Muscle : Relationship Between KCa Channel Diversity and Smooth Muscle Cell Function.
C. B. Neylon, R. J. Lang, Y. Fu, A. Bobik, and P. H. Reinhart (1999)
Circ. Res. 85 , e33-e43
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Molecular Components of Large Conductance Calcium-Activated Potassium (BK) Channels in Mouse Pituitary Corticotropes.
M. J. Shipston, R. R. Duncan, A. G. Clark, F. A. Antoni, and L. Tian (1999)
Mol. Endocrinol. 13, 1728-1737
   Abstract »    Full Text »
Acute Activation of Maxi-K Channels (hSlo) by Estradiol Binding to the  Subunit.
M. A. Valverde, P. Rojas, J. Amigo, D. Cosmelli, P. Orio, M. I. Bahamonde, G. E. Mann, C. Vergara, and R. Latorre (1999)
Science 285, 1929-1931
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