4k6o

Publication Abstract from PubMed

Uridine phosphorylase catalyzes the phosphorolysis of ribonucleosides, with the nitrogenous base and ribose 1-phosphate as products. Additionally, it catalyzes the reverse reaction of the synthesis of ribonucleosides from ribose 1-phosphate and a nitrogenous base. However, the enzyme does not catalyze the synthesis of nucleosides when the substrate is a nitrogenous base substituted at the 6-position, such as 6-methyluracil (6-MU). In order to explain this fact, it is essential to investigate the three-dimensional structure of the complex of 6-MU with uridine phosphorylase. 6-MU is a pharmaceutical agent that improves tissue nutrition and enhances cell regeneration by normalization of nucleotide exchange in humans. 6-MU is used for the treatment of diseases of the gastrointestinal tract, including infectious diseases. Here, procedures to obtain the uridine phosphorylase from the pathogenic bacterium Vibrio cholerae (VchUPh), purification of this enzyme, crystallization of the complex of VchUPh with 6-MU, and X-ray data collection and preliminary X-ray analysis of the VchUPh-6-MU complex at atomic resolution are reported.

Crystallization and preliminary X-ray study of Vibrio cholerae uridine phosphorylase in complex with 6-methyluracil.,Prokofev II, Lashkov AA, Gabdulkhakov AG, Dontsova MV, Seregina TA, Mironov AS, Betzel C, Mikhailov AM Acta Crystallogr F Struct Biol Commun. 2014 Jan;70(Pt 1):60-3. doi:, 10.1107/S2053230X13031877. Epub 2013 Dec 24. PMID:24419619^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.