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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

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Martin, W. et al.

Microsequencing and cDNA cloning of the Calvin cycle/OPPP enzyme ribose-5-phosphate isomerase (EC 5.3.1.6) from spinach chloroplasts.

Ribose-5-phosphate isomerase ( RPI) catalyses the interconversion of ribose-5-phosphate and ribulose-5-phosphate in the reductive and oxidative pentose phosphate pathways in plants. RPI from spinach chloroplasts was purified and microsequenced. Via PCR with degenerate primers designed against microsequenced peptides, a hybridisation probe was obtained and used to isolate several cDNA clones which encode RPI. The nuclear-encoded 239 amino acid mature RPI subunit has a predicted size of 25.3 kDa and is translated as a cytosolic precursor possessing a 50 amino acid transit peptide. The processing site of the transit peptide was identified from protein sequence data. Spinach leaves possess only one type of homodimeric RPI enzyme which is localized in chloroplasts and is encoded by a single nuclear gene. Molecular characterization of RPI supports the view that a single amphibolic RPI enzyme functions in the oxidative and reductive pentose phosphate pathways of spinach plastids.[1]

References

Microsequencing and cDNA cloning of the Calvin cycle/OPPP enzyme ribose-5-phosphate isomerase (EC 5.3.1.6) from spinach chloroplasts. Martin, W., Henze, K., Kellerman, J., Flechner, A., Schnarrenberger, C. Plant Mol. Biol. (1996) [Pubmed]

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