guanosine-monophosphate and xanthosine

Plants can fully catabolize purine nucleotides. A firmly established central intermediate is the purine base xanthine. In the current widely accepted model of plant purine nucleotide catabolism, xanthine can be generated in various ways involving either inosine and hypoxanthine or guanosine and xanthosine as intermediates. In a comprehensive mutant analysis involving single and multiple mutants of urate oxidase, xanthine dehydrogenase, nucleoside hydrolases, guanosine deaminase, and hypoxanthine guanine phosphoribosyltransferase, we demonstrate that purine nucleotide catabolism in Arabidopsis (

Topics: Adenosine Monophosphate; Arabidopsis; Arabidopsis Proteins; Guanosine Monophosphate; Mutation; N-Glycosyl Hydrolases; Nucleoside Deaminases; Plants, Genetically Modified; Ribonucleosides; Xanthines