title: Overexpression in Escherichia coli and purification of pteridine reductase (PTR1) from a clinical isolate of Leishmania donovani.
abstract: Pteridine reductase 1 (PTR1) is part of a novel metabolic pathway in Leishmania associated with folate metabolism. Its main function is to salvage pterins but a second one is to reduce folates. The novelty and possible uniqueness of the pathway in which PTR1 is involved opens the possibility of developing specific inhibitors, which in combination with dihydrofolate reductase inhibitors could be highly effective against Leishmania. In order to increase our understanding of this putative important chemotherapeutic target, we present here the cloning, overexpression and purification of this enzyme from a clinical isolate of Leishmania donovani causing kala azar in India. This recombinant enzyme will set the basis for inhibition studies as well as for structure-function relationships.
authors.affiliation: Drug Target Discovery and Development Division, Central Drug Research Institute, Lucknow, India.
authors.forename: Pranav
authors.initials: P
authors.lastname: Kumar
authors.forename: Hema
authors.initials: H
authors.lastname: Kothari
authors.forename: Neeloo
authors.initials: N
authors.lastname: Singh
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D003001:Cloning, Molecular; D004926:Escherichia coli / Q000235:genetics* / Q000378:metabolism; D015971:Gene Expression Regulation, Enzymologic; D005822:Genetic Vectors / Q000235:genetics; D007893:Leishmania donovani / Q000201:enzymology* / Q000235:genetics*; D008969:Molecular Sequence Data; D010088:Oxidoreductases / Q000096:biosynthesis / Q000235:genetics* / Q000302:isolation & purification*; D011993:Recombinant Fusion Proteins / Q000096:biosynthesis / Q000235:genetics / Q000302:isolation & purification; D017386:Sequence Homology, Amino Acid; D013045:Species Specificity
chemical_list: D011993:Recombinant Fusion Proteins; D010088:Oxidoreductases; C085592:pteridine reductase