Xylulose is a ketopentose, a monosaccharide containing five carbon atoms, and including a ketone functional group. It has the chemical formula C 5 H 10 O 5 . In nature, it occurs in both the L - and D - enantiomers .

Saccharomyces cerevisiae can naturally ferment D-xylulose through the pentose phosphate pathway. In another approach, bacterial xylose isomerases have been introduced into S. cerevisiae. This enzyme catalyze the direct formation of D-xylulose from D-xylose.

Xylose (cf. Ancient Greek: ξύλον, xylon, "wood") is a sugar first isolated from wood, and named for it.Xylose is classified as a monosaccharide of the aldopentose type, which means that it contains five carbon atoms and includes an aldehyde functional group.It is derived from hemicellulose, one of the main constituents of biomass.Like most sugars, it can adopt several structures depending ...

Xylulose is phosphorylated at the C5–OH position by xylulokinase (XK) to yield xylulose-5-phosphate (X5P), which is further channeled into glycolytic intermediates such as glyceraldehyde-3-phosphate (GA3P) and fructose-6-phosphate (F6P) via the pentose phosphate pathway (PPP).

D-xylulose is the D-enantiomer of xylulose. It has a role as a human metabolite, an Escherichia coli metabolite, a Saccharomyces cerevisiae metabolite and a mouse metabolite. It is an enantiomer of a L-xylulose .

Nov 30, 2015 · Via the oxido-reductase metabolism pathway of xylose in eukaryotic organisms, xylose is ultimately catabolized into (D)-xylulose-5-phosphate, which functions as an intermediate in the pentose phosphate pathway 2.

Feb 1, 2020 · Xylose is initially converted into xylulose by different enzymes in various microorganisms. In bacteria, isomerization of xylose to xylulose is usually catalyzed by xylose isomerase (XI) directly , whereas yeast and mycelial fungi need a two-step pathway employing d-xylose reductase (XR) and xylitol dehydrogenase (XDH) . In this XR-XDH pathway ...

Dec 12, 2021 · Xylulokinase (XK) (EC 2.7.1.17) is a substrate (d-xylulose) specific kinase enzyme catalysing the phosphorylation reaction d-xylulose + ATP → d-xylulose-5-phopsphate + ADP. XK in B. coagulans is a 56 kDa protein consisting of 1536 bp with 511 amino acids.

It is likely imbedded slowly in the passage system, so it keeps unfavourable impacts of normal sugar level. It is used as a nutritional option for diabetics. It also has advanced drugs for osteoporosis and other respiratory disease. The d-xylulose sugar produced by M. smegmatis to give a useful xylitol compound [104].

a pentose sugar occurring as d-xylulose and l-xylulose, one of the few l sugars found in nature; it is sometimes excreted in the urine (see pentosuria).