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Biochem J
2007 Jun 15;4043:383-91. doi: 10.1042/BJ20070101.
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The inositol 1,4,5-trisphosphate receptor (Itpr) gene family in Xenopus: identification of type 2 and type 3 inositol 1,4,5-trisphosphate receptor subtypes.
Zhang D
,
Boulware MJ
,
Pendleton MR
,
Nogi T
,
Marchant JS
.
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Studies in the Xenopus model system have provided considerable insight into the developmental role of intracellular Ca2+ signals produced by activation of IP3Rs (inositol 1,4,5-trisphosphate receptors). However, unlike mammalian systems where three IP3R subtypes have been well characterized, our molecular understanding of the IP3Rs that underpin Ca2+ signalling during Xenopus embryogenesis relate solely to the original characterization of the 'Xenopus IP3R' cloned and purified from Xenopus laevis oocytes several years ago. In the present study, we have identified Xenopus type 2 and type 3 IP3Rs and report the full-length sequence, genomic architecture and developmental expression profile of these additional IP3R subtypes. In the light of the emerging genomic resources and opportunities for genetic manipulation in the diploid frog Xenopus tropicalis, these data will facilitate manipulations to resolve the contribution of IP3R diversity in Ca2+ signalling events observed during vertebrate development.
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