Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/113694
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dc.titleTranscript scanning reveals novel and extensive splice variations in human L-type voltage-gated calcium channel, Cav1.2 α1 subunit
dc.contributor.authorTang, Z.Z.
dc.contributor.authorLiang, M.C.
dc.contributor.authorLu, S.
dc.contributor.authorYu, D.
dc.contributor.authorYu, C.Y.
dc.contributor.authorYue, D.T.
dc.contributor.authorSoong, T.W.
dc.date.accessioned2014-12-01T06:57:22Z
dc.date.available2014-12-01T06:57:22Z
dc.date.issued2004-10-22
dc.identifier.citationTang, Z.Z., Liang, M.C., Lu, S., Yu, D., Yu, C.Y., Yue, D.T., Soong, T.W. (2004-10-22). Transcript scanning reveals novel and extensive splice variations in human L-type voltage-gated calcium channel, Cav1.2 α1 subunit. Journal of Biological Chemistry 279 (43) : 44335-44343. ScholarBank@NUS Repository.
dc.identifier.issn00219258
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/113694
dc.description.abstractThe L-type (Cav1.2) voltage-gated calcium channels play critical roles in membrane excitability, gene expression, and muscle contraction. The generation of splice variants by the alternative splicing of the pore-forming Cav1.2 α1-subunit (α11.2) may thereby provide potent means to enrich functional diversity. To date, however, no comprehensive scan of α11.2 splice variation has been performed, particularly in the human context. Here we have undertaken such a screen, exploiting recently developed "transcript scanning" methods to probe the human gene. The degree of variation turns out to be surprisingly large; 19 of the 55 exons comprising the human α11.2 gene were subjected to alternative splicing. Two of these are previously unrecognized exons and two others were not known to be spliced. Comparisons of fetal and adult heart and brain uncovered a large IVS3-S4 variability resulting from combinatorial utilization of exons 31-33. Electrophysiological characterization of such IVS3-S4 variation revealed unmistakable shifts in the voltage dependence of activation, according to an interesting correlation between increased IVS3-S4 linker length and activation at more depolarized potentials. Steady-state inactivation profiles remained unaltered. This systematic portrait of splice variation furnishes a reference library for comprehending combinatorial arrangements of Cav1.2 splice exons, especially as they impact development, physiology, and disease.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1074/jbc.M407023200
dc.sourceScopus
dc.typeArticle
dc.contributor.departmentPHYSIOLOGY
dc.description.sourcetitleJournal of Biological Chemistry
dc.description.volume279
dc.description.issue43
dc.description.page44335-44343
dc.description.codenJBCHA
dc.identifier.isiut000224505600015
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