Contribution of Model Organisms to Investigating the Far-Reaching Consequences of PRPP Metabolism on Human Health and Well-Being

Eziuche A. Ugbogu, Lilian M. Schweizer, Michael Schweizer*

*Corresponding author for this work

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Abstract

Phosphoribosyl pyrophosphate synthetase (PRS EC 2.7.6.1) is a rate-limiting enzyme that irreversibly catalyzes the formation of phosphoribosyl pyrophosphate (PRPP) from ribose-5-phosphate and adenosine triphosphate (ATP). This key metabolite is required for the synthesis of purine and pyrimidine nucleotides, the two aromatic amino acids histidine and tryptophan, the cofactors nicotinamide adenine dinucleotide (NAD+) and nicotinamide adenine dinucleotide phosphate (NADP+), all of which are essential for various life processes. Despite its ubiquity and essential nature across the plant and animal kingdoms, PRPP synthetase displays species-specific characteristics regarding the number of gene copies and architecture permitting interaction with other areas of cellular metabolism. The impact of mutated PRS genes in the model eukaryote Saccharomyces cerevisiae on cell signalling and metabolism may be relevant to the human neuropathies associated with PRPS mutations. Human PRPS1 and PRPS2 gene products are implicated in drug resistance associated with recurrent acute lymphoblastic leukaemia and progression of colorectal cancer and hepatocellular carcinoma. The investigation of PRPP metabolism in accepted model organisms, e.g., yeast and zebrafish, has the potential to reveal novel drug targets for treating at least some of the diseases, often characterized by overlapping symptoms, such as Arts syndrome and respiratory infections, and uncover the significance and relevance of human PRPS in disease diagnosis, management, and treatment.
Original languageEnglish
Article number1909
Number of pages37
JournalCells
Volume11
Issue number12
DOIs
Publication statusPublished - 13 Jun 2022

Keywords

  • ageing
  • cancer
  • cell signalling
  • CMTX5
  • CWI pathway
  • Danio rerio
  • DFN2/DFNX1
  • eukaryotic model organisms
  • human neuropathies: Arts syndrome
  • phosphoribosyl pyrophosphate synthetase (PRS/PRPS)
  • Saccharomyces cerevisiae

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)

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