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Maria L B Magalhães et al.
Biochemistry, 47(24), 6499-6507 (2008-05-27)
Riboflavin is biosynthesized by most microorganisms and plants, while mammals depend entirely on the absorption of this vitamin from the diet to meet their metabolic needs. Therefore, riboflavin biosynthesis appears to be an attractive target for drug design, since appropriate...
Hairong Huang et al.
Microbiology (Reading, England), 154(Pt 3), 736-743 (2008-03-04)
Decaprenylphosphoryl-d-arabinose (DPA) has been shown to be the donor of the essential d-arabinofuranosyl residues found in the cell wall of Mycobacterium tuberculosis. DPA is formed from phosphoribose diphosphate in a four-step process. The first step is the nucleophilic replacement of...
S K Guha et al.
Archives of biochemistry and biophysics, 250(2), 513-518 (1986-11-01)
Ribose-1,5-bisphosphate is synthesized in a reaction that uses ribose-1(or 5)-P as the phosphoryl acceptor and the acyl-P of 3-phosphoglyceryl phosphate as the donor. Glucose-1,6-bisphosphate is synthesized in a similar reaction. The relative activity with the two substrates remains unchanged over...
Robert E Sharwood et al.
Journal of experimental botany, 67(10), 3137-3148 (2016-04-29)
Plants operating C3 and C4 photosynthetic pathways exhibit differences in leaf anatomy and photosynthetic carbon fixation biochemistry. Fully understanding this underpinning biochemical variation is requisite to identifying solutions for improving photosynthetic efficiency and growth. Here we refine assay methods for...
E Ishikawa et al.
The Journal of biological chemistry, 265(31), 18875-18878 (1990-11-05)
Ribose 1,5-bisphosphate (Rib-1,5-P2), a newly discovered activator of rat brain phosphofructokinase, forms rapidly during the initiation of glycolytic flux and disappears within 20 s (Ogushi, S., Lawson, J.W. R., Dobson, G.P., Veech, R.L., and Uyeda, K. (1990) J. Biol. Chem....
I Ozaki et al.
Comparative biochemistry and physiology. Part B, Biochemistry & molecular biology, 125(1), 97-102 (2000-06-07)
Fructose-1,6-bisphosphatase is one of the regulatory enzymes of gluconeogenesis in kidney cortex. The effect of ribose 1,5-bisphosphate on fructose-1,6-bisphosphatase purified from rat kidney cortex was studied. Rat kidney cortex, fructose-1,6-bisphosphatase exhibited hyperbolic kinetics with regard to its substrate, but the...
M Sawada et al.
The international journal of biochemistry & cell biology, 32(4), 447-454 (2000-04-13)
6-Phosphofructo-1-kinase and fructose-1,6-bisphosphatase are rate-limiting enzymes for glycolysis and gluconeogenesis respectively, in the fructose 6-phosphate/fructose 1,6-bisphosphate cycle in the liver. The effect of ribose 1,5-bisphosphate on the enzymes was investigated. Ribose 1,5-bisphosphate synergistically relieved the ATP inhibition and increased the...
T Kawaguchi et al.
The Journal of biological chemistry, 276(30), 28554-28561 (2001-05-25)
Macrophages can adapt to the absence of oxygen by switching to anaerobic glycolysis. In this study, we investigated (a) the roles of fructose 2,6-bisphosphate (Fru-2,6-P2) and ribose 1,5-bisphosphate (Rib-1,5-P2), potent activators of phosphofructokinase, (b) the enzymes responsible for the synthesis...
Concepción Iñiguez et al.
Journal of experimental botany, 70(4), 1283-1297 (2018-12-24)
Despite the high productivity and ecological importance of seaweeds in polar coastal regions, little is known about their carbon utilization mechanisms, especially the kinetics of the CO2-fixing enzyme Rubisco. We analyzed Rubisco carboxylation kinetics at 4 °C and 25 °C...
S Ogushi et al.
The Journal of biological chemistry, 265(19), 10943-10949 (1990-07-05)
The tissue contents of previously known allosteric effectors of brain phosphofructokinase (EC (PFK) and the kinetic behavior of isolated PFK were investigated during the initiation of rapid glycolytic flux in freeze-blown rat brain. Comparing 0- with 5-s brains revealed...
Takaaki Sato et al.
Science (New York, N.Y.), 315(5814), 1003-1006 (2007-02-17)
The type III ribulose-1,5-bisphosphate carboxylase-oxygenase (RuBisCO) present in the archaeon Thermococcus kodakaraensis was found to participate in adenosine 5'-monophosphate (AMP) metabolism, a role that is distinct from that of classical RuBisCOs of the Calvin-Benson-Bassham cycle. Genes annotated as thymidine phosphorylase...
M Willemoës et al.
Biochemistry, 36(16), 5078-5083 (1997-04-22)
The mechanism of binding of the substrates Mg x ATP and ribose 5-phosphate as well as Mg2+ to the enzyme 5-phospho-D-ribosyl (alpha-1-diphosphate synthetase from Escherichia coli has been analyzed. By use of the competive inhibitors of ATP and ribose 5-phosphate...
T Ozeki et al.
Comparative biochemistry and physiology. Part B, Biochemistry & molecular biology, 124(3), 327-332 (2000-01-13)
Phosphofructokinase (EC is a major enzyme of the glycolytic pathway, catalyzing the conversion of fructose 6-phosphate to fructose 1,6-bisphosphate. In this study, we demonstrated the effect of ribose 1,5-bisphosphate on phosphofructokinase purified from rat kidney cortex. Ribose 1,5-bisphosphate relieved...
Bjarne Hove-Jensen et al.
Journal of bacteriology, 185(9), 2793-2801 (2003-04-18)
An enzymatic pathway for synthesis of 5-phospho-D-ribosyl alpha-1-diphosphate (PRPP) without the participation of PRPP synthase was analyzed in Escherichia coli. This pathway was revealed by selection for suppression of the NAD requirement of strains with a deletion of the prs...
David I Fisher et al.
The Journal of biological chemistry, 277(49), 47313-47317 (2002-10-09)
A total of 17 Nudix hydrolases were tested for their ability to hydrolyze 5-phosphoribosyl 1-pyrophosphate (PRPP). All 11 enzymes that were active toward dinucleoside polyphosphates with 4 or more phosphate groups as substrates were also able to hydrolyze PRPP, whereas...
Akira Nakamura et al.
The Journal of biological chemistry, 287(25), 20784-20796 (2012-04-19)
Ribose-1,5-bisphosphate isomerase (R15Pi) is a novel enzyme recently identified as a member of an AMP metabolic pathway in archaea. The enzyme converts d-ribose 1,5-bisphosphate into ribulose 1,5-bisphosphate, providing the substrate for archaeal ribulose-1,5-bisphosphate carboxylase/oxygenases. We here report the crystal structures...