Thiamine pyrophosphate (TPP) family, PDC_IPDC subfamily, TPP-binding module; composed of proteins similar to pyruvate decarboxylase (PDC) and indolepyruvate decarboxylase (IPDC). PDC, a key enzyme in alcoholic fermentation, catalyzes the conversion of pyruvate to acetaldehyde and CO2. It is able to utilize other 2-oxo acids as substrates. In plants and various plant-associated bacteria, IPDC plays a role in the indole-3-pyruvic acid (IPA) pathway, a tryptophan-dependent biosynthetic route to indole-3-acetaldehyde (IAA). IPDC catalyzes the decarboxylation of IPA to IAA. Both PDC and IPDC depend on TPP and Mg2+ as cofactors.
Jiyao W et al.(2023). "The conserved domain database in 2023.",