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. 1989 May;90(1):13-6.
doi: 10.1104/pp.90.1.13.

An Assessment of the Rubisco Inhibitor: 2-Carboxyarabinitol-1-Phosphate and d-Hamamelonic Acid 2-Phosphate Are Identical Compounds

E Beck  1 , R Scheibe, J Reiner
Affiliations

An Assessment of the Rubisco Inhibitor: 2-Carboxyarabinitol-1-Phosphate and d-Hamamelonic Acid 2-Phosphate Are Identical Compounds

E Beck et al. Plant Physiol. 1989 May.

Abstract

2-Carboxyarabinitol-1-phosphate, the nocturnal inhibitor of ribulose-1,5-bisphosphate carboxylase/oxygenase is identical with d-hamamelonic acid-2(1)-phosphate. Reasoning is based on theoretical considerations as well as on mass spectra and (1)H- and (13)C-NMR spectra of the phosphate-free compounds. d-Hamamelonic acid-2(1)-phosphate is interpreted as a metabolic derivative of d-hamamelose-2(1),5-bisphosphate which originates in the chloroplast from fructose-1,6-bisphosphate. A simple method for the synthesis of the inhibitor is suggested.

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