5u03

Structural highlights

Disease

[PYRG1_HUMAN] The disease is caused by mutations affecting the gene represented in this entry. A unique and recessive G to C mutation probably affecting a splice donor site at the junction of intron 17-18 and exon 18 has been identified in all patients. It results in expression of an abnormal transcript lacking exon 18 and a complete loss of the expression of the protein.^[1]

Function

[PYRG1_HUMAN] This enzyme is involved in the de novo synthesis of CTP, a precursor of DNA, RNA and phospholipids. Catalyzes the ATP-dependent amination of UTP to CTP with either L-glutamine or ammonia as a source of nitrogen. This enzyme and its product, CTP, play a crucial role in the proliferation of activated lymphocytes and therefore in immunity.^{[2] [3]}

References

1. ↑ Martin E, Palmic N, Sanquer S, Lenoir C, Hauck F, Mongellaz C, Fabrega S, Nitschke P, Esposti MD, Schwartzentruber J, Taylor N, Majewski J, Jabado N, Wynn RF, Picard C, Fischer A, Arkwright PD, Latour S. CTP synthase 1 deficiency in humans reveals its central role in lymphocyte proliferation. Nature. 2014 Jun 12;510(7504):288-92. doi: 10.1038/nature13386. Epub 2014 May 28. PMID:24870241 doi:http://dx.doi.org/10.1038/nature13386
2. ↑ Han GS, Sreenivas A, Choi MG, Chang YF, Martin SS, Baldwin EP, Carman GM. Expression of Human CTP synthetase in Saccharomyces cerevisiae reveals phosphorylation by protein kinase A. J Biol Chem. 2005 Nov 18;280(46):38328-36. Epub 2005 Sep 22. PMID:16179339 doi:http://dx.doi.org/10.1074/jbc.M509622200
3. ↑ Martin E, Palmic N, Sanquer S, Lenoir C, Hauck F, Mongellaz C, Fabrega S, Nitschke P, Esposti MD, Schwartzentruber J, Taylor N, Majewski J, Jabado N, Wynn RF, Picard C, Fischer A, Arkwright PD, Latour S. CTP synthase 1 deficiency in humans reveals its central role in lymphocyte proliferation. Nature. 2014 Jun 12;510(7504):288-92. doi: 10.1038/nature13386. Epub 2014 May 28. PMID:24870241 doi:http://dx.doi.org/10.1038/nature13386