Results

RDF/XMLNTriplesTurtleShow queryShare
SubjectPredicateObject
http://purl.uniprot.org/citations/15200686http://www.w3.org/1999/02/22-rdf-syntax-ns#typehttp://purl.uniprot.org/core/Journal_Citation
http://purl.uniprot.org/citations/15200686http://www.w3.org/2000/01/rdf-schema#comment"

Background

Apyrases are divalent ion dependent tri- and dinucleotide phosphatases with different substrate specificity. The intracellular lysosomal apyrase LALP70 is also expressed as a splice variant (LALP70v) lacking a VSFASSQQ motif in the center of the molecule (aminoacids 287-294). However, the functional significance of this motif is unknown. In this report we used a thin layer chromatography approach to study separately the UTPase and UDPase activity of the two LALP-enzymes.

Results

We show, that LALP70 and LALP70v cleaved UTP to UDP in a calcium independent manner. In contrast, the cleavage of UDP to UMP was strongly calcium dependent for LALP70, but calcium independent for LALP70v.

Conclusions

The VSFASSQQ motif not only influences the substrate specificity of LALP70, but it confers calcium sensitivity to LALP70 during the UDP cleavage. Whether this is due to direct binding of calcium to this motif or to a conformational change of the enzyme, remains to be elucidated."xsd:string
http://purl.uniprot.org/citations/15200686http://purl.org/dc/terms/identifier"doi:10.1186/1471-2091-5-8"xsd:string
http://purl.uniprot.org/citations/15200686http://purl.uniprot.org/core/author"Elsasser H.P."xsd:string
http://purl.uniprot.org/citations/15200686http://purl.uniprot.org/core/author"Biederbick A."xsd:string
http://purl.uniprot.org/citations/15200686http://purl.uniprot.org/core/author"Rosser R."xsd:string
http://purl.uniprot.org/citations/15200686http://purl.uniprot.org/core/author"Storre J."xsd:string
http://purl.uniprot.org/citations/15200686http://purl.uniprot.org/core/date"2004"xsd:gYear
http://purl.uniprot.org/citations/15200686http://purl.uniprot.org/core/name"BMC Biochem"xsd:string
http://purl.uniprot.org/citations/15200686http://purl.uniprot.org/core/pages"8"xsd:string
http://purl.uniprot.org/citations/15200686http://purl.uniprot.org/core/title"The VSFASSQQ motif confers calcium sensitivity to the intracellular apyrase LALP70."xsd:string
http://purl.uniprot.org/citations/15200686http://purl.uniprot.org/core/volume"5"xsd:string
http://purl.uniprot.org/citations/15200686http://www.w3.org/2004/02/skos/core#exactMatchhttp://purl.uniprot.org/pubmed/15200686
http://purl.uniprot.org/citations/15200686http://xmlns.com/foaf/0.1/primaryTopicOfhttps://pubmed.ncbi.nlm.nih.gov/15200686
http://purl.uniprot.org/uniprot/#_B4DU21-mappedCitation-15200686http://www.w3.org/1999/02/22-rdf-syntax-ns#objecthttp://purl.uniprot.org/citations/15200686
http://purl.uniprot.org/uniprot/#_Q8NE73-mappedCitation-15200686http://www.w3.org/1999/02/22-rdf-syntax-ns#objecthttp://purl.uniprot.org/citations/15200686
http://purl.uniprot.org/uniprot/#_Q9Y227-mappedCitation-15200686http://www.w3.org/1999/02/22-rdf-syntax-ns#objecthttp://purl.uniprot.org/citations/15200686
http://purl.uniprot.org/uniprot/Q9Y227http://purl.uniprot.org/core/mappedCitationhttp://purl.uniprot.org/citations/15200686
http://purl.uniprot.org/uniprot/B4DU21http://purl.uniprot.org/core/mappedCitationhttp://purl.uniprot.org/citations/15200686
http://purl.uniprot.org/uniprot/Q8NE73http://purl.uniprot.org/core/mappedCitationhttp://purl.uniprot.org/citations/15200686