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Biochem Biophys Res Commun. 1996 Jan 26;218(3):916-23.

Purification and cloning of a soluble ATP-diphosphohydrolase (apyrase) from potato tubers (Solanum tuberosum).

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  • 1Department of Molecular and Cellular Biology, Harvard University, Cambridge, Massachusetts 02138, USA. mhanda@fas.harvard.edu.

Abstract

A soluble ATP-diphosphohydrolase (apyrase, EC 3.6.1.5) has been purified from potato tubers. Solanum tuberosum, to a specific activity of 10,000 mumol P(i)/mg/min. The cDNA corresponding to the potato apyrase has been isolated and termed RROP1. The deduced amino acid sequence contains a putative signal sequence, two hydrophobic regions at the carboxy terminus, two potential Asn-linked glycosylation sites, and four regions in the amino-terminal half that we term ACR (apyrase conserved regions) 1-4 that are highly conserved in known apyrases and related enzymes; garden pea nucleoside triphosphatase, Toxoplasma gondii nucleoside triphosphate hydrolases, and Saccharomyces cerevisiae golgi guanosine diphosphatase. A yeast 71.9-kDa hypothetical protein on chromosome V, a Caenorhabditis elegans hypothetical 61.3-kDa protein on chromosome III, and human CD39, a lymphoid cell activation antigen, also share the conserved ACR regions, but their ability to hydrolyze nucleotides has not been assessed.

PMID:
8579614
[PubMed - indexed for MEDLINE]
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