D-ribose-5-phosphate isomerase from spinach: heterologous overexpression, purification, characterization, and site-directed mutagenesis of the recombinant enzyme.

@article{Jung2000Dribose5phosphateIF,
  title={D-ribose-5-phosphate isomerase from spinach: heterologous overexpression, purification, characterization, and site-directed mutagenesis of the recombinant enzyme.},
  author={Christine Jung and Fred C. Hartman and T Y Lu and Frank W. Larimer},
  journal={Archives of biochemistry and biophysics},
  year={2000},
  volume={373 2},
  pages={
          409-17
        }
}
A cDNA encoding spinach chloroplastic ribose-5-phosphate isomerase (RPI) was cloned and overexpressed in Escherichia coli, and a purification scheme for the recombinant enzyme was developed. The purified recombinant RPI is a homodimer of 25-kDa subunits and shows kinetic properties similar to those of the homodimeric enzyme isolated from spinach leaves (A. C. Rutner, 1970, Biochemistry 9, 178-184). Phosphate, used as a buffer in previous studies, is a competitive inhibitor of RPI with a K(i) of… 
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TLDR
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A mutation in an Arabidopsis ribose 5-phosphate isomerase reduces cellulose synthesis and is rescued by exogenous uridine.
TLDR
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Enhanced isomerization of rare sugars by ribose-5-phosphate isomerase A from Ochrobactrum sp. CSL1.
TLDR
This study highlights the potential of OsRpiA as a biocatalyst for rare sugar preparation, and provides distinct evidences for its catalytic mechanism.
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