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GCAPs: Ca2+-Sensitive Regulators of retGC

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Photoreceptors and Calcium

Part of the book series: Advances in Experimental Medicine and Biology ((AEMB,volume 514))

Abstract

Lowered concentration of Ca2+ions, resulting from illumination of the photoreceptor cell, is the signal for resynthesis of cGMP by retina-specific guanylyl cyclase (retGC). This Ca2+-dependent activation of retGC is mediated by Ca2+-binding proteins named GCAPs (guanylyl cyclase-activating proteins) and contributes to the recovery of photoreceptor cell to the dark state. Three different GCAPs (GCAP1, GCAP2 and GCAP3) are identified in vertebrate retina to date. In this chapter we describe their discovery, methods of purification, properties, and possible modes of action.

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Gorczyca, W.A., Sokal, I. (2002). GCAPs: Ca2+-Sensitive Regulators of retGC. In: Baehr, W., Palczewski, K. (eds) Photoreceptors and Calcium. Advances in Experimental Medicine and Biology, vol 514. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-0121-3_19

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  • DOI: https://doi.org/10.1007/978-1-4615-0121-3_19

  • Publisher Name: Springer, Boston, MA

  • Print ISBN: 978-1-4613-4933-4

  • Online ISBN: 978-1-4615-0121-3

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