Synthesis of Oxalic Acid by Enzymes from Lettuce Leaves | Zendy

David D. Davies | Zendy; H. Asker | Zendy

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Synthesis of Oxalic Acid by Enzymes from Lettuce Leaves

Author(s) -

David D. Davies,

H. Asker

Publication year - 1983

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.72.1.134

Subject(s) - glyoxylate cycle , oxalate , oxalic acid , biochemistry , lactate dehydrogenase , chemistry , enzyme , dehydrogenase , peroxisome , oxidase test , organic chemistry , gene

A rapid purification of lactate dehydrogenase and glycolate oxidase from lettuce (Lactuca sativa) leaves is described. The kinetics of both enzymes are reported in relation to their possible roles in the production of oxalate. Lettuce lactate dehydrogenase behaves like mammalian dehydrogenase, catalyzing the dismutation of glyoxylate to glycolate and oxalate. A model is proposed in which glycolate oxidase in the peroxisomes and lactate dehydrogenase in the cytosol are involved in the production of oxalate. The effect of pH on the balance between oxalate and glycolate produced from glyoxylate suggests that in leaves lactate dehydrogenase may function as part of an oxalate-based biochemical, pH-stat.

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