Bifunctional aminodeoxychorismate lyase / D-amino acid transaminase

UniProtKB accession:  Q79FW0

Grouped By:  Matching UniProtKB accession

UniProtKB description:  Bifunctional enzyme that catalyzes two enzymatic reactions in biochemically unrelated pathways: acts as an aminodeoxychorismate (ADC) lyase (ADCL) in folate biosynthesis, converting 4-amino-4-deoxychorismate (ADC) to 4-aminobenzoate (PABA), and as a D-amino acid transaminase (DAAT) in peptidoglycan (PG) biosynthesis (PubMed:33950161). DAAT activity is strictly restricted to D-alanine and D-glutamate (PubMed:33950161). May function as a metabolic toggle that alternates between ADCL and DAAT activity, prioritizing the former over the latter in response to substrate accumulation (PubMed:33950161). Bifunctionality of this enzyme provides a failsafe mechanism for a metabolic coupling between nucleic acid and cell wall biosynthesis that appears to ensure prioritization of PABA production over D-alanine/D-glutamate biosynthesis (PubMed:33950161).