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New aspects of nuclear calcium signalling

Gerasimenko, Oleg Vsevolodovich and Gerasimenko, Julia Vladimirovna 2004. New aspects of nuclear calcium signalling. Journal of Cell Science 117 (15) , pp. 3087-3094. 10.1242/jcs.01295

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Abstract

Nuclear calcium signalling has been a controversial battlefield for many years and the question of how permeable the nuclear pore complexes (NPCs) are to Ca2+ has been the subject of a particularly hot dispute. Recent data from isolated nuclei suggest that the NPCs are open even after depletion of the Ca2+ store in the nuclear envelope. Other research has suggested that a new Ca2+-releasing messenger, nicotinic acid adenine dinucleotide phosphate (NAADP), can liberate Ca2+ only from acidic organelles, probably lysosomes, rather than from the traditional Ca2+ store in the endoplasmic reticulum (ER). Recent work indicates that NAADP can release Ca2+ from the nuclear envelope (NE), which has a thapsigargin-sensitive, ER-type Ca2+ store. NAADP acts in a manner similar to inositol (1,4,5)-trisphosphate [Ins(1,4,5)P3] or cyclic ADP-ribose (cADPR): all three messengers are equally able to reduce the Ca2+ concentration inside the NE and this is associated with a transient rise in the nucleoplasmic Ca2+ concentration. The NE contains ryanodine receptors (RyRs) and Ins(1,4,5)P3 receptors [Ins(1,4,5)P3Rs], and these can be activated separately and independently: the RyRs by either NAADP or cADPR, and the Ins(1,4,5)P3Rs by Ins(1,4,5)P3.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Biosciences
Publisher: The Company of Biologists Ltd
ISSN: 0021-9533
Last Modified: 17 Apr 2019 20:54
URI: http://orca-mwe.cf.ac.uk/id/eprint/63354

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