Inhibition of ribulose 1,5-diphosphate carboxylase by 6-phosphogluconate.

Plant physiology ·Vol. 50 ·No. 2 ·1972-08-00 ·Pages 224-7

Chu DK, Bassham JA

Abstract

6-Phosphogluconate is a much more effective inhibitor of the photosynthetic carboxylation enzyme, ribulose-1, 5-diphosphate carboxylase, than other sugar phosphates and sugar acids of the reductive and oxidative pentose phosphate cycles. The inhibition appears to be noncompetitive with ribulose 1,5-diphosphate. Since 6-phosphogluconate is unique to the oxidative cycle and inhibits at concentrations comparable to those found in vivo, it is proposed that its inhibition of the carboxylase may be a regulatory factor. If so, it would operate during darkness as a different control factor from those factors postulated to activate the carboxylase during photosynthesis.

Authors & Affiliations

2 authors, click to expand affiliations / ORCID

Chu D K

Laboratory of Chemical Biodynamics, Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720.

Bassham J A

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12 references, click to expand

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Article Info

Journal

Plant physiology

Abbr.

Plant Physiol

ISSN

0032-0889

DOI

10.1104/pp.50.2.224

Published

1972-08-00

Pages

224-7

Language

English

Region

United States

NLM ID

0401224

PMCID

PMC366114

External Links

PubMed source DOI: 10.1104/pp.50.2.224 PMC Full Text View journal details

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Inhibition of ribulose 1,5-diphosphate carboxylase by 6-phosphogluconate.

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