Structure of Pyrr (Rv1379) from Mycobacterium Tuberculosis: A Persistence Gene and Protein Drug TargetKantardjieff, K.A., Vasquez, C., Castro, P., Warfel, N.N., Rho, B.-S., Lekin, T., Kim, C.-Y., Segelke, B.W., Terwilliger, T., Rupp, B.
(2005) Acta Crystallogr.,Sect.D 61: 355
- PubMed: 15805589
- DOI: 10.1107/S090744490403389X
- PubMed Abstract:
The Mycobacterium tuberculosis pyrR gene (Rv1379) encodes a protein that regulates the expression of pyrimidine-nucleotide biosynthesis (pyr) genes in a UMP-dependent manner. Because pyrimidine biosynthesis is an essential step in the progression of ...
The Mycobacterium tuberculosis pyrR gene (Rv1379) encodes a protein that regulates the expression of pyrimidine-nucleotide biosynthesis (pyr) genes in a UMP-dependent manner. Because pyrimidine biosynthesis is an essential step in the progression of TB, the gene product pyrR is an attractive antitubercular drug target. The 1.9 A native structure of Mtb pyrR determined by the TB Structural Genomics Consortium facilities in trigonal space group P3(1)21 is reported, with unit-cell parameters a = 66.64, c = 154.72 A at 120 K and two molecules in the asymmetric unit. The three-dimensional structure and residual uracil phosphoribosyltransferase activity point to a common PRTase ancestor for pyrR. However, while PRPP- and UMP-binding sites have been retained in Mtb pyrR, a distinct dimer interaction among subunits creates a deep positively charged cleft capable of binding pyr mRNA. In silico screening of pyrimidine-nucleoside analogs has revealed a number of potential lead compounds that, if bound to Mtb pyrR, could facilitate transcriptional attenuation, particularly cyclopentenyl nucleosides.
Department of Chemistry and Biochemistry and W. M. Keck Foundation Center for Molecular Structure, California State University Fullerton, Fullerton, CA 92834, USA.