A Mechanism for the Indirect Transfer of Photosynthetically Reduced Nicotinamide Adenine Dinucleotide Phosphate from Chloroplasts to the Cytoplasm | Zendy

Grahame J. Kelly | Zendy; Martin Gibbs | Zendy

Open Access

A Mechanism for the Indirect Transfer of Photosynthetically Reduced Nicotinamide Adenine Dinucleotide Phosphate from Chloroplasts to the Cytoplasm

Author(s) -

Grahame J. Kelly,

Martin Gibbs

Publication year - 1973

Publication title -

plant physiology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.554

H-Index - 312

eISSN - 1532-2548

pISSN - 0032-0889

DOI - 10.1104/pp.52.6.674

Subject(s) - chloroplast , glyceraldehyde 3 phosphate dehydrogenase , dehydrogenase , phosphoglycerate kinase , phosphate , biochemistry , photosynthesis , nicotinamide adenine dinucleotide , cytoplasm , glyceraldehyde , nicotinamide adenine dinucleotide phosphate , biology , chloroplast membrane , chemistry , nad+ kinase , enzyme , thylakoid , gene , oxidase test

A triose phosphate/3-phosphoglycerate shuttle for the indirect transfer of photosynthetically reduced NADP from chloroplasts to the cytoplasm has been demonstrated in vitro. Triose phosphate, formed from 3-phosphoglycerate in the chloroplast, was oxidized back to 3-phosphoglycerate outside the chloroplast by the nonreversible d-glyceraldehyde 3-phosphate dehydrogenase reaction which is specific for NADP. The 3-phosphoglycerate could presumably return to the chloroplast to complete the shuttle. The properties of nonreversible d-glyceraldehyde 3-phosphate dehydrogenase are considered particularly suitable for effective operation of this shuttle system.

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