title: Prephenate decarboxylases: a new prephenate-utilizing enzyme family that performs nonaromatizing decarboxylation en route to diverse secondary metabolites.
abstract: Prephenate is the direct precursor of phenylpyruvate and 4-hydroxyphenylpyruvate in the biogenesis of phenylalanine and tyrosine by action of the decarboxylative, aromatizing enzymes prephenate dehydratase and dehydrogenase, respectively. The recent characterization of BacA in bacilysin biosynthesis as a nonaromatizing decarboxylase reveals a new route from prephenate in the biosynthesis of nonproteinogenic amino acids. This study describes two additional enzymes, AerD from Planktothrix agardhii and SalX from Salinispora tropica, that utilize the central building block prephenate for flux down distinct pathways to amino acid products, representing a new metabolic fate for prephenate and establishing a new family of nonaromatizing prephenate decarboxylases.
authors.affiliation: Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, Massachusetts 02115, United States.
authors.forename: Sarah
authors.initials: S
authors.lastname: Mahlstedt
authors.forename: Elisha N
authors.initials: EN
authors.lastname: Fielding
authors.forename: Bradley S
authors.initials: BS
authors.lastname: Moore
authors.forename: Christopher T
authors.initials: CT
authors.lastname: Walsh
mesh_terms: D000192:Actinomycetales / Q000201:enzymology / Q000235:genetics; D001426:Bacterial Proteins / Q000235:genetics / Q000378:metabolism; D002262:Carboxy-Lyases / Q000235:genetics / Q000378:metabolism*; D000458:Cyanobacteria / Q000201:enzymology / Q000235:genetics; D003509:Cyclohexanecarboxylic Acids / Q000737:chemistry / Q000378:metabolism*; D053138:Cyclohexenes / Q000737:chemistry / Q000378:metabolism*; D005798:Genes, Bacterial
chemical_list: D001426:Bacterial Proteins; D003509:Cyclohexanecarboxylic Acids; D053138:Cyclohexenes; D002262:Carboxy-Lyases; C005550:prephenic acid