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2,5-diketo-D-gluconic acid

Synthesis by Way of D-t/ireo-2,5-Hexodiulosonic Acid ( 2,5-Diketo-D-gluconic Acid )... [Pg.137]

El- glucose dehydrogenase E2- gluconic acid dehydrogenase E3- 2-keto-D-gluconic acid dehydrogenase E4- 2,5-diketo-D-gluconic acid reductase... [Pg.585]

Diketo-D-gluconic acid Obt. by cultivation of Gluconobacter sp. or Erwinia citreus on glucose, galactose in v. high efficiency. Intermed. in coml. synth. of ascorbic acid. [a]o -54.1 (c, 1 in H2O). Hamersak, Z. et al., Carbohydr. Res., 1997, 302, 245-249 (synth, bibl)... [Pg.428]

Banta S, Swanson BA, Wu S, Jamagin A, Anderson S (2002) Optimizing an artificial metabolic pathway engineering the cofactor specificity of Corynebacterium 2,5-diketo-D-gluconic acid reductase for use in vitamin C biosynthesis. Biochemistry 41 6226-6236 Bremus C, Herrmann U, Biinger-Meyer S, Sahm H (2006) The use of microorganisms in L-ascorbic acid production. J Biotechnol 124 196-205... [Pg.257]

Microbial oxidation of D-glucose gives calcium 2,5-diketo-D-gluconate (145) whose hydrazones (146) are converted to the betaines 148 by acid-catalyzed decarboxylation and cyclodehydralion (Scheme 6). ° Derivatives of these stable crystalline compounds have also been prepared by (i) methylation (Me2SO4) of 4-hydroxypyridazines (143) and (ii) thermal elimination of methyl iodide from 5-methoxy-l-methylpyridazinium iodides (144). 2 Irradiation of the mesomeric betaines (148) in ethanol (Hg arc lamp)... [Pg.26]

Fig. 13.1 Substance oxidation respiratory chains of acetic acid bacteria. Many kinds of membrane-bound dehydrogenases oxidize the cognate substrates with coupling to reduction of ubiquinone UQ). The reduced ubiquinone (UQH2) is then directly reoxidized by the terminal ubuquinol oxidase (Cyt. bo ). The colors of Enz 1, Enz 2, and Enz 3 are related to those in Fig. 13.7. DEC, putative 2,5-diketo-D-gluconate decarboxylase other abbreviations are referred to the text... Fig. 13.1 Substance oxidation respiratory chains of acetic acid bacteria. Many kinds of membrane-bound dehydrogenases oxidize the cognate substrates with coupling to reduction of ubiquinone UQ). The reduced ubiquinone (UQH2) is then directly reoxidized by the terminal ubuquinol oxidase (Cyt. bo ). The colors of Enz 1, Enz 2, and Enz 3 are related to those in Fig. 13.7. DEC, putative 2,5-diketo-D-gluconate decarboxylase other abbreviations are referred to the text...
In alkaline solutions the oxidation of 5-keto-D-gluconic acid, dehydro-L-ascorbic acid, and 2,3-diketo-L-gulonic acid are completely inhibited by borate which would indicate the reaction of these ligands with borate (54). [Pg.175]

Therefore, an innovative two-step fermentation process were discovered to resolve this problem. In the new innovative two-step fermentation process, the D-glucose was converted into 2,5-diketo-gluonic acid (2,5-DKG) by Erwinia herhicola ATCC 21988 or some similar strains with glucose dehydrogenase, gluconate dehydrogenase... [Pg.253]

D-Glucose D-Gluconic acid Keto-5 gluconic acid Keto-2 gluconic acid Diketo-2,5 gluconic acid... [Pg.186]

K.D., and Ludwig, R. (2012) 2,5-Diketo-gluconic acid reductase from Corynebacterium glutamicum . characterization of stability, catalytic properties and inhibition mechanism for use in vitamin C synthesis. Process Biochem., 47, 2012-2019. [Pg.331]

See other pages where 2,5-diketo-D-gluconic acid is mentioned: [Pg.309]    [Pg.15]    [Pg.78]    [Pg.79]    [Pg.137]    [Pg.586]    [Pg.609]    [Pg.1352]    [Pg.15]    [Pg.28]    [Pg.116]    [Pg.1042]    [Pg.241]    [Pg.24]    [Pg.323]    [Pg.959]    [Pg.309]    [Pg.15]    [Pg.78]    [Pg.79]    [Pg.137]    [Pg.586]    [Pg.609]    [Pg.1352]    [Pg.15]    [Pg.28]    [Pg.116]    [Pg.1042]    [Pg.241]    [Pg.24]    [Pg.323]    [Pg.959]    [Pg.194]    [Pg.185]    [Pg.186]    [Pg.244]    [Pg.251]    [Pg.10]    [Pg.16]    [Pg.20]    [Pg.21]    [Pg.26]    [Pg.31]    [Pg.33]    [Pg.34]    [Pg.41]    [Pg.42]    [Pg.289]    [Pg.330]    [Pg.38]    [Pg.40]    [Pg.314]   
See also in sourсe #XX -- [ Pg.323 , Pg.324 , Pg.329 , Pg.330 ]



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2.5- Diketo-D-gluconate

D-Gluconic acid

Diketo acids

Glucon

Gluconate

Gluconic

Gluconic acid

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