A Subfamily of Bacterial Ribokinases Utilizes a Hemithioacetal for Pyridoxal Phosphate Salvage
作者:Matthew B. Nodwell、Maximilian F. Koch、Ferdinand Alte、Sabine Schneider、Stephan A. Sieber
DOI:10.1021/ja411785r
日期:2014.4.2
and plants, most higher organisms rely on a salvage pathway that phosphorylates either pyridoxal (PL) or its related vitamers, pyridoxine (PN) and pyridoxamine (PM). PL kinases (PLKs) are essential for this phosphorylation step and are thus of major importance for cellular viability. We recently identified a pyridoxal kinase (SaPLK) as a target of the natural product antibiotic rugulactone (Ru) in Staphylococcus
Structural and functional studies on
<i>Salmonella typhimurium</i>
pyridoxal kinase: the first structural evidence for the formation of Schiff base with the substrate
作者:Geeta Deka、Josyula N. Kalyani、Fathima Benazir Jahangir、Pallavi Sabharwal、Handanahal S. Savithri、Mathur R. N. Murthy
DOI:10.1111/febs.14933
日期:2019.9
Form II). We found that, in the ternary complexstructure of StPLK, the active site Lys233 forms a Schiff base linkage with the substrate (PL). Although formation of a Schiff base with the active site Lys229 was demonstrated in the Escherichiacoli enzyme based on biochemical studies, the ternary complex of StPLK represents the first crystalstructure where the Schiff bond formation has been observed
Fluoroimines from the reaction of fluoroamino acids or fluoroketo acids with the aldehyde or amine form of vitamin B6: Part III. Influence of fluorine on the formation and the reactivity of fluoroimines derived from β-fluoroaspartates or β-fluorooxaloacetate
作者:M.C. Salon、S. Hamman、C.G. Beguin
DOI:10.1016/s0022-1139(00)80907-0
日期:1985.4
in oxaloacetate, the typical amino acid-keto acid couple in transamination, induces large effects in their reaction with respectively pyridoxal 5′-phosphate (PLP) (1) and pyridoxamine 5′-phosphate (PMP) (4). The formation of imine intermediates through reaction of 1 with erythro or threo-β-fluoroaspartate (2e and 2t) and through reaction of 4 with β-fluorooxaloacetate 5 is highly favored in comparison