Characterisation of two genes for guanylate cyclase activator protein (GCAP1 and GCAP2) in the Japanese pufferfish, Fugu rubripes

Wilkie, Susan E. and Stinton, Inez and Cottrill, Philippa and Deery, Evelyne and Newbold, Richard J. and Warren, Martin J. and Bhattacharya, Shomi S. and Hunt, David M. (2002) Characterisation of two genes for guanylate cyclase activator protein (GCAP1 and GCAP2) in the Japanese pufferfish, Fugu rubripes. Biochimica et Biophysica Acta (BBA) - Gene Structure and Expression, 1577 (1). pp. 73-80. ISSN 0167-4781 . (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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cDNA and genomic clones encoding guanylate cyclase activating proteins (GCAP1 and GCAP2) in the Japanese puffer fish (Fugu rubripes) were identified by probing, respectively, a retinal cDNA library and a whole genomic cosmid library with human GCAP1 and GCAP2 cDNA probes. Clones were identified as GCAP1 and GCAP2 on the basis of amino acid identity with the equivalent frog sequences and their placement into GCAP1 and GCAP2 clades within a GCAP phylogenetic tree. The Fugu genes have an identical four exon/three intron structure to GCAP1 and GCAP2 genes from other vertebrates but the introns are smaller, with the result that the four exons spread over approximately 1 kb of DNA in each case. The two genes are separated on to separate cosmids. However, the results of Southern analysis of the cosmids and of genomic DNA are consistent with a tail-to-tail gene arrangement, as in other species, but with a surprisingly large intergenic separation of around 18.7 kb. Recombinant Fugu GCAP1 failed to activate human retinal guanylate cyclase (retGC) in vitro although CD spectroscopy shows that the protein is folded with a similar secondary structure to that of human GCAP1. The failure to activate may be due therefore to a lack of molecular compatibility in this heterologous assay system.

Item Type: Article
Additional information: 0006-3002 (Print) Journal Article Research Support, Non-U.S. Gov't
Uncontrolled keywords: Amino Acid Sequence Base Sequence Calcium-Binding Proteins/chemistry/*genetics Cloning, Molecular Genes Guanylate Cyclase-Activating Proteins Humans Molecular Sequence Data Phylogeny Protein Folding Recombinant Proteins/chemistry Retina/metabolism Sequence Alignment Sequence Analysis, DNA Sequence Homology, Amino Acid Takifugu/*genetics
Subjects: Q Science
Divisions: Faculties > Science Technology and Medical Studies > School of Biosciences
Depositing User: Martin Warren
Date Deposited: 09 Oct 2009 08:17
Last Modified: 15 Jul 2014 13:55
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