Linked Life Data

17482382

Source:http://linkedlifedata.com/resource/pubmed/id/17482382

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pubmed-article:17482382pubmed:abstractTextWhole genome sequence data permit the study of protein families regulating cellular homeostasis during development. Here we present a study of the sea urchin Ca(2+)-ATPases made possible by the Sea Urchin Genome Sequencing Project. This is of potential interest because adult sea urchins, their gametes and embryos live in the relatively high Ca(2+) concentration of 10 mM. Three Ca(2+)-ATPases regulate Ca(2+) levels in animal cells: plasma membrane Ca(2+)-ATPase (PMCA), sarcoplasmic/endoplasmic reticulum Ca(2+)-ATPase (SERCA) and secretory pathway Ca(2+)-ATPase (SPCA). The primary structures of Sp-PMCA and Sp-SERCA in the sea urchin, Strongylocentrotus purpuratus (Sp), have been published. Here, we present the primary structure of Sp-SPCA, which is 912 amino acids and has 66% identity and 80% similarity to human SPCA1. Southern blots and genome analysis show that Sp-SPCA is a single copy gene. Each Sp Ca(2+)-ATPase is highly conserved when compared to its human ortholog, indicating that human and sea urchin share structurally similar energy driven Ca(2+) homeostasis mechanisms that have been maintained throughout the course of deuterostome evolution. Annotation using the assembled sea urchin genome reveals that Sp-SPCA, Sp-PMCA and Sp-SERCA have 23, 17 and 24 exons. RT-Q-PCR shows that transcripts of Sp-SPCA are at low levels compared to Sp-PMCA and Sp-SERCA. Gradual increases in Sp-PMCA and Sp-SERCA mRNA begin at the 18 hour hatched blastula stage and peak 4-5-fold higher by 25 h at the mid to late blastulae stage.lld:pubmed
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pubmed-article:17482382pubmed:authorpubmed-author:VacquierVicto...lld:pubmed
pubmed-article:17482382pubmed:authorpubmed-author:Jayantha...lld:pubmed
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pubmed-article:17482382pubmed:dateRevised2010-11-18lld:pubmed
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pubmed-article:17482382pubmed:year2007lld:pubmed
pubmed-article:17482382pubmed:articleTitleSequence, annotation and developmental expression of the sea urchin Ca(2+) -ATPase family.lld:pubmed
pubmed-article:17482382pubmed:affiliationCenter for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA 92093-0202, USA. jayantha_gunaratne@etc.a-star.edu.sglld:pubmed
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pubmed-article:17482382pubmed:publicationTypeResearch Support, N.I.H., Extramurallld:pubmed