Enzymes
| UniProtKB help_outline | 1,518 proteins |
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- Name help_outline inosine Identifier CHEBI:17596 (CAS: 58-63-9) help_outline Charge 0 Formula C10H12N4O5 InChIKeyhelp_outline UGQMRVRMYYASKQ-KQYNXXCUSA-N SMILEShelp_outline OC[C@H]1O[C@H]([C@H](O)[C@@H]1O)n1cnc2c(O)ncnc12 2D coordinates Mol file for the small molecule Search links Involved in 20 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline CMP Identifier CHEBI:60377 Charge -2 Formula C9H12N3O8P InChIKeyhelp_outline IERHLVCPSMICTF-XVFCMESISA-L SMILEShelp_outline Nc1ccn([C@@H]2O[C@H](COP([O-])([O-])=O)[C@@H](O)[C@H]2O)c(=O)n1 2D coordinates Mol file for the small molecule Search links Involved in 193 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline cytidine Identifier CHEBI:17562 (CAS: 65-46-3) help_outline Charge 0 Formula C9H13N3O5 InChIKeyhelp_outline UHDGCWIWMRVCDJ-XVFCMESISA-N SMILEShelp_outline Nc1ccn([C@@H]2O[C@H](CO)[C@@H](O)[C@H]2O)c(=O)n1 2D coordinates Mol file for the small molecule Search links Involved in 14 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline IMP Identifier CHEBI:58053 Charge -2 Formula C10H11N4O8P InChIKeyhelp_outline GRSZFWQUAKGDAV-KQYNXXCUSA-L SMILEShelp_outline O[C@@H]1[C@@H](COP([O-])([O-])=O)O[C@H]([C@@H]1O)n1cnc2c1nc[nH]c2=O 2D coordinates Mol file for the small molecule Search links Involved in 20 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
Cross-references
| RHEA:69592 | RHEA:69593 | RHEA:69594 | RHEA:69595 | |
|---|---|---|---|---|
| Reaction direction help_outline | undefined | left-to-right | right-to-left | bidirectional |
| UniProtKB help_outline |
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Publications
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Bovine cytosolic IMP/GMP-specific 5'-nucleotidase: cloning and expression of active enzyme in Escherichia coli.
Allegrini S., Pesi R., Tozzi M.G., Fiol C.J., Johnson R.B., Eriksson S.
A cDNA coding for bovine cytosolic IMP/GMP-specific 5'-nucleotidase endowed with phosphotransferase activity was cloned from calf thymus RNA, by 5' and 3' rapid amplification of cDNA ends protocols (5' and 3' RACE). Two products were isolated: a 5' RACE 1.6 kb fragment and a 3' RACE 2.0 kb fragmen ... >> More
A cDNA coding for bovine cytosolic IMP/GMP-specific 5'-nucleotidase endowed with phosphotransferase activity was cloned from calf thymus RNA, by 5' and 3' rapid amplification of cDNA ends protocols (5' and 3' RACE). Two products were isolated: a 5' RACE 1.6 kb fragment and a 3' RACE 2.0 kb fragment, with an overlapping region of 505 bp, leading to a total length of approx. 2951 bp. The similarity in the coding region to that of the human 5'-nucleotidase cDNA sequence [Oka, Matsumoto, Hosokawa and Inoue (1994) Biochem. Biophys. Res. Commun. 205, 917-922], indirectly identified as a 5'-nucleotidase, was 94% and the deduced amino acid sequences were 99.5% identical. The bovine cDNA sequence included the sequences codifying for six peptides obtained from 5'-nucleotidase/phosphotransferase purified from calf thymus. Northern blots of human mRNA species from different tissues showed a 3.6 kb mRNA expressed at equal levels in most tissues. The cDNA was cloned into a pET-28c expression vector and the protein obtained after induction had a molecular mass of 61 kDa under SDS/PAGE. It exhibited both 5'-nucleotidase and phosphotransferase activity, as well as immunological and kinetic properties similar to those of the enzyme purified from calf thymus. This is the first time that a fully active recombinant 5'nucleotidase has been described. << Less
Biochem. J. 328:483-487(1997) [PubMed] [EuropePMC]
This publication is cited by 5 other entries.
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The bifunctional cytosolic 5'-nucleotidase: regulation of the phosphotransferase and nucleotidase activities.
Pesi R., Turriani M., Allegrini S., Scolozzi C., Camici M., Ipata P.L., Tozzi M.G.
The cytosolic 5'-nucleotidase specific for IMP, GMP, and their deoxyderivatives has been purified approximately 1000 times from calf thymus. The enzyme, in the presence of a suitable nucleoside, can act as a phosphotransferase, catalyzing the transfer of the phosphate moiety from a nucleoside mono ... >> More
The cytosolic 5'-nucleotidase specific for IMP, GMP, and their deoxyderivatives has been purified approximately 1000 times from calf thymus. The enzyme, in the presence of a suitable nucleoside, can act as a phosphotransferase, catalyzing the transfer of the phosphate moiety from a nucleoside monophosphate donor to a nucleoside acceptor, thus operating as an interconverting activity. This phosphorylating activity has drawn the attention of several research groups because the cytosolic 5'-nucleotidase represents the only cellular enzyme able to phosphorylate inosine and guanosine analogs, which are not substrates of known cellular nucleoside kinases. In this paper, we report the kinetic parameters of the bifunctional enzyme and its response to variations in adenylate energy charge. The results seem to indicate that in the presence of physiological concentrations of ATP and phosphate, the enzyme behaves mainly as a phosphotransferase, its activity being dependent only on the availability of a suitable nucleoside. << Less
Arch. Biochem. Biophys. 312:75-80(1994) [PubMed] [EuropePMC]
This publication is cited by 5 other entries.
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Nucleoside phosphotransferase activity of human colon carcinoma cytosolic 5'-nucleotidase.
Tozzi M.G., Camici M., Pesi R., Allegrini S., Sgarrella F., Ipata P.L.
A cytosolic 5'-nucleotidase, acting preferentially on IMP and GMP, has been isolated from human colon carcinoma extracts. This enzyme activity catalyzes also the transfer of the phosphate group of 5'-nucleoside monophosphates (mainly, 5'-IMP, 5'-GMP, and their deoxycounterparts) to nucleosides (pr ... >> More
A cytosolic 5'-nucleotidase, acting preferentially on IMP and GMP, has been isolated from human colon carcinoma extracts. This enzyme activity catalyzes also the transfer of the phosphate group of 5'-nucleoside monophosphates (mainly, 5'-IMP, 5'-GMP, and their deoxycounterparts) to nucleosides (preferentially inosine and deoxyinosine, but also nucleoside analogs, such as 8-azaguanosine and 2',3'-dideoxyinosine). It has been proposed that the enzyme mechanism involves the formation of a phosphorylated enzyme as an intermediate which can transfer the phosphate group either to water or to the nucleoside. The enzyme is activated by some effectors, such as ATP and 2,3-diphosphoglycerate. Results indicate that the effect of these activators is mainly to favor the transfer of the phosphate of the phosphorylated intermediate to the nucleoside (i.e., the nucleoside phosphotransferase activity). This finding is in accordance with previous suggestions that cytosolic 5'-nucleotidase cannot be considered a pure catabolic enzyme. << Less
Arch. Biochem. Biophys. 291:212-217(1991) [PubMed] [EuropePMC]
This publication is cited by 5 other entries.