Voltage-sensitive prestin orthologue expressed in zebrafish hair cells

Jörg T. Albert, Harald Winter, Thorsten J. Schaechinger, Thomas Weber, Xiang Wang, David Z.Z. He, Oliver Hendrich, Hyun Soon Geisler, Ulrike Zimmermann, Katrin Oelmann, Marlies Knipper, Martin C. Göpfert, Dominik Oliver

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Abstract

Prestin, a member of the solute carrier (SLC) family SLC26A, is the molecular motor that drives the somatic electromotility of mammalian outer hair cells (OHCs). Its closest reported homologue, zebrafish prestin (zprestin), shares ∼70% strong amino acid sequence similarity with mammalian prestin, predicting an almost identical protein structure. Immunohistochemical analysis now shows that zprestin is expressed in hair cells of the zebrafish ear. Similar to mammalian prestin, heterologously expressed zprestin is found to generate voltage-dependent charge movements, giving rise to a non-linear capacitance (NLC) of the cell membrane. Compared with mammalian prestin, charge movements mediated by zprestin display a weaker voltage dependence and slower kinetics; they occur at more positive membrane voltages, and are not associated with electromotile responses. Given this functional dissociation of NLC and electromotility and the structural similarity with mammalian prestin, we anticipate that zprestin provides a valuable tool for tracing the molecular and evolutionary bases of prestin motor function. copy; 2007 The Authors. Journal compilation

Original languageEnglish (US)
Pages (from-to)451-461
Number of pages11
JournalJournal of Physiology
Volume580
Issue number2
DOIs
StatePublished - Apr 15 2007

All Science Journal Classification (ASJC) codes

  • Physiology

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    Albert, J. T., Winter, H., Schaechinger, T. J., Weber, T., Wang, X., He, D. Z. Z., Hendrich, O., Geisler, H. S., Zimmermann, U., Oelmann, K., Knipper, M., Göpfert, M. C., & Oliver, D. (2007). Voltage-sensitive prestin orthologue expressed in zebrafish hair cells. Journal of Physiology, 580(2), 451-461. https://doi.org/10.1113/jphysiol.2007.127993