Ferredoxin-stimulated photosynthetic oxygen reduction and concommitant decarboxylation of glyoxylate by chloroplast lamellar systems is inhibited by ascorbate but ferredoxin dependent NADP+-reduction is not. In the presence of low potential electron acceptors (AQ or MV) this influence of ascorbate on glyoxylate decarboxylation by chloroplast lamellar systems is no longer observed. Using the dia...

The decarboxylation of phthalic acids was studied with Bacillus sp. strain FO, a marine mixed culture ON-7, and Pseudomonas testosteroni. The mixed culture ON-7, when grown anaerobically on phthalate but incubated aerobically with chloramphenicol, quantitatively converted phthalic acid to benzoic acid. Substituted phthalic acids were also decarboxylated: 4,5-dihydroxyphthalic acid to protocatec...

The formation of fossil oil within clay minerals i.e. mineral-catalyzed decarboxylation, is a mechanism awaiting a thorough chemical explanation. To contribute to such an explanation, the study presented here investigates this mechanism at the level of first principles, electronic structure computations, employing density functional theory (DFT plus Hubbard U), planewaves, pseudopotentials and ...

This study reveals the potential of Salicornia bigelovii for producing valuable products via pyrolysis. The presence metals in ash inhibited decarboxylation and dehydration during pyrolysis increased yield bio-oil.

The 3-keto-L-gulonate 6-phosphate decarboxylase (KGPDC) encoded by the ulaD gene in the Escherichia coli genome [Yew, W. S., and Gerlt, J. A. (2002) J. Bacteriol. 184, 302-306] and orotidine 5'-monophosphate decarboxylase (OMPDC) are homologous (derived from a common ancestor) but catalyze different reactions. The metal-independent decarboxylation reaction catalyzed by OMPDC avoids the formatio...

Nonenzymatic pyridoxal phosphate (PLP) catalyzed decarboxylations and transaminations have been revisited experimentally. Metal ions are known to catalyze a variety of PLP-dependent reactions in solution, including transamination. It is demonstrated here that the rate accelerations previously observed are due solely to enhancement of Schiff base formation under subsaturating conditions. A varie...

Dialkylglycine decarboxylase (DGD) is a pyridoxal phosphate dependent enzyme that catalyzes both decarboxylation and transamination in its normal catalytic cycle. DGD uses stereoelectronic effects to control its unusual reaction specificity. X-ray crystallographic structures of DGD suggest that Q52 is important in maintaining the substrate carboxylate in a stereoelectronically activated positio...