53798-20-2Relevant academic research and scientific papers
Characterization of a thermotolerant ROK-type mannofructokinase from Streptococcus mitis: application to the synthesis of phosphorylated sugars
Vergne-Vaxelaire, Carine,Mariage, Aline,Petit, Jean-Louis,Fossey-Jouenne, Aurélie,Guérard-Hélaine, Christine,Darii, Ekaterina,Debard, Adrien,Nepert, Stessy,Pellouin, Virginie,Lemaire, Marielle,Zaparucha, Anne,Salanoubat, Marcel,de Berardinis, Véronique
, p. 5569 - 5583 (2018)
Most of the “repressor, open reading frame, kinase” (ROK) proteins already characterized so far, and exhibiting a kinase activity, take restrictedly d-glucose as substrate. By exploring the sequenced bacterial diversity, 61 ATP-dependent kinases belonging to the ROK family have been identified and experimentally assayed for the phosphorylation of hexoses. These kinases were mainly found to be thermotolerant and highly active toward d-mannose and d-fructose with notable activities toward d-tagatose. Among them, the ATP-dependent kinase from the mesophile Streptococcus mitis (named ScrKmitis) was biochemically characterized and its substrate spectrum further studied. This enzyme possessed impressive catalytic efficiencies toward d-mannose and d-fructose of 1.5 106?s?1?M?1 and 2.7 105?s?1?M?1, respectively, but also significant ones toward d-tagatose (3.5 102?s?1?M?1) and the unnatural monosaccharides d-altrose (1.1 104?s?1?M?1) and d-talose (3.4 102?s?1?M?1). Specific activities measured for all hexoses showed a high stereopreference for d- over l-series. As proof of concept, 8 hexoses were phosphorylated in moderate to good yields, some of them described for the first time like l-sorbose-5-phosphate unusually phosphorylated in position 5. Its thermotolerance, its wide pH tolerance (from 7 to 10), and temperature range (> 85% activity between 40 and 70?°C) open the way to applications in the enzymatic synthesis of monophosphorylated hexoses.
Competitive inhibitors of type B ribose 5-phosphate isomerases: design, synthesis and kinetic evaluation of new d-allose and d-allulose 6-phosphate derivatives
Mariano, Sandrine,Roos, Annette K.,Mowbray, Sherry L.,Salmon, Laurent
experimental part, p. 869 - 880 (2009/08/07)
This study reports syntheses of d-allose 6-phosphate (All6P), d-allulose (or d-psicose) 6-phosphate (Allu6P), and seven d-ribose 5-phosphate isomerase (Rpi) inhibitors. The inhibitors were designed as analogues of the 6-carbon high-energy intermediate pos
