Search results for ENTPD2

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Protein (1 results from a total of 1)

Identifier: R-HSA-8851088
Species: Homo sapiens
Compartment: plasma membrane
Primary external reference: UniProt: ENTPD2: Q9Y5L3

Complex (1 results from a total of 1)

Identifier: R-HSA-8851095
Species: Homo sapiens
Compartment: plasma membrane

Reaction (1 results from a total of 1)

Identifier: R-HSA-8851089
Species: Homo sapiens
Compartment: extracellular region, plasma membrane
NTPDase2 (CD39L1), encoded by the ENTPD2 gene, is an ectonucleoside triphosphate diphosphohydrolase that is expressed at the plasma membrane where it hydrolyzes extracellular nucleoside triphosphates (ATP, GTP, CTP, ITP, UTP) to the respective nucleoside diphosphate (ADP, GDP, CDP, IDP, UDP) in the presence of Ca2+ of Mg2+ ions. NTPDase2 is only marginally active in hydrolyzing nucleoside diphosphates, such as ADP and UDP (Kegel et al. 1997, Kirley et al. 1997, Mateo et al. 1999). The alpha splicing isoform of NTPDase2 is expressed at the plasma membrane, while beta and gamma isoforms are expressed in the endoplasmic reticulum (Mateo et al. 2003). NTPDase2 may oligomerize and the oligomerization state may affect substrate specificity (Failer et al. 2003).

NTPDase2 may contribute to vascular hemostasis by exerting an opposing role to NTPDase1 (Sévigny et al. 2002).

Pathway (1 results from a total of 1)

Identifier: R-HSA-8850843
Species: Homo sapiens
The ectonucleoside triphosphate diphosphatase (E-NTPDase family) of ectonucleotidases includes 8 enzymes: NTPDase1 (encoded by the ENTPD1 gene), NTPDase2 (encoded by the ENTPD2 gene), NTPDase3 (encoded by the ENTPD3 gene), NTPDase4 (encoded by the ENTPD4 gene), NTPDase5 (encoded by the ENTPD5 gene), NTPDase6 (encoded by the ENTPD6 gene), NTPDase7 (encoded by the ENTPD7 gene) and NTPDase8 (encoded by the ENTPD8 gene). NTPDases hydrolyze nucleoside triphosphates and nucleoside diphosphates, producing the corresponding nucleoside monophosphates as final products. Different family members show different specificity for particular nucleotides. NTPDases are involved in various biological processes, such as hemostasis, immune response and development of the nervous system.
The catalytic domain of NTPDases is contained within the loop formed by a cluster of apyrase conserved regions (ACRs). All family members require divalent cations, such as calcium (Ca2+) or magnesium (Mg2+) ions, for catalytic activity. The hydrolysis involves a nucleophilic attack of a water molecule on the terminal phosphate of a nucleotide substrate.
All E-NTPDase family members are transmembrane proteins, associated with either plasma membrane (NTPDase1, NTPDase2, NTPDase3 and NTPDase8) or organelle membranes (NTPDase4 and NTPDase7). Two family members, NTPDase5 and NTPDase6, can be secreted into extracellular space following a proteolytic cleavage from the plasma membrane. NTPDases hydrolyze exocytoplasmic nucleotides, thus regulating the availability of ligands for purinergic receptors. Glycosylation and oligomerization are involved in the regulation of NTPDases, but have not been thoroughly studied.

For reviews of the NTPDase family, please refer to Robson et al. 2006 and Zimmermann et al. 2012.

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