5/28/2023 0 Comments Editseq free downloadThe genomic structures of both NUDT5 and mNudT5 were determined and located on human chromosome 10 and mouse chromosome 2, respectively. Both NUDT5 and mNudT5 transcripts were ubiquitously expressed in tissues analyzed with preferential abundance in liver. mNudT5 has 81% amino acid identity to NUDT5 with catalytic activities similar to NUDT5 under the optimal pH of 9. The murine NUDT5 homolog was also cloned and characterized. At the optimal pH of 7, the purified recombinant NUDT5 catalyzed hydrolysis of two major substrates ADP-ribose and ADP-mannose with K m values of 32 and 83 μ m, respectively the V max for ADP-mannose was about 1.5 times that with ADP-ribose. The recombinant NUDT5 was expressed in Escherichia coli and purified to near homogeneity. The deduced amino acid sequence of NUDT5 contains 219 amino acids, including a conserved Nudix box sequence. Here we report cloning and characterization of a human cDNA encoding a novel nudix hydrolase NUDT5 for the hydrolysis of ADP-sugars. Proteins containing the Nudix box “G X 5E X 7REU XEE XGU” (where U is usually Leu, Val, or Ile) are Nudix hydrolases, which catalyze the hydrolysis of a variety of nucleoside diphosphate derivatives.
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