CaT1 Contributes to the Stores-operated Calcium Current in Jurkat T-lymphocytes

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Monovalent Permeability, Rectification, and Ionic Block of Store-operated Calcium Channels in Jurkat T Lymphocytes

We used whole-cell recording to characterize ion permeation, rectification, and block of monovalent current through calcium release-activated calcium (CRAC) channels in Jurkat T lymphocytes. Under physiological conditions, CRAC channels exhibit a high degree of selectivity for Ca2+, but can be induced to carry a slowly declining Na+ current when external divalent ions are reduced to micromolar ...

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In T lymphocytes, a store-operated calcium ion (Ca2+) entry mechanism termed the calcium release-activated Ca2+ channel (CRAC channel) underlies the sustained or oscillatory intracellular calcium concentration signal required for interleukin-2 gene expression and cell proliferation. The use of sodium ions as a current carrier enabled single-channel recordings of CRAC channels during activation,...

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ژورنال

عنوان ژورنال: Journal of Biological Chemistry

سال: 2002

ISSN: 0021-9258

DOI: 10.1074/jbc.m205870200