SUMMARY Two new intermediates were identified in the protocatechuate pathway of Pseudomonas putida. The first of these, y - carboxymuconolactone (y -carboxy- y-carboxymethyl- A-butenolide), is the product of the enzymic lactonization of #-carboxy-cis, cis-muconate. Enzymic decarboxylation of y-carboxymuconolactone gives rise to -ketoadipate enol-lactone (y-carboxymethyl-A 5 -butenolide), the second newly discovered intermediate in the protocatechuate pathway. -Ketoadipate enol-lactone, which was isolated and physi-cally characterized, is also an intermediate in the catechol pathway; the catechol and protocatechuate pathways con-verge at this point. -Ketoadipate enol-lactone is hydrolyzed to P-ketoadipate an enzyme for utilization of either catechol or also degrades protocatechuate and catechol by the pathways characteristic of P. putida.
The conversion of catechol and protocatechuate to beta-ketoadipate by Pseudomonas putida.
Published 1966 in Journal of Biological Chemistry
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1966
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Journal of Biological Chemistry
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Unknown publication date
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Biology, Medicine, Chemistry, Environmental Science
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Semantic Scholar, PubMed
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