Xylose - an overview | ScienceDirect Topics
Xylose as a nectar sugar: from biochemistry to ecology. Sue Jackson, Susan W. Nicolson, in Comparative Biochemistry and Physiology Part B: Biochemistry and Molecular Biology, 2002. Xylose is also found as a monosaccharide in the nectar of Protea and Faurea, two closely-related genera with a widespread distribution in sub-Saharan Africa. They ...
Xylose - an overview | ScienceDirect Topics
Xylose is a kind of pentose; its molecular formula is C 5 H 10 O 5 and its structural formula is shown in Fig. 6.2. Hemicellulose is a polysaccharide of d-xylose in nature. The industrial production of xylose has been gradually maturing. Xylose is often used as a food sweetener and is the source of xylitol.
Xylose - an overview | ScienceDirect Topics
Xylose is the supreme and most attractive sugar obtained from hemicellulosic fraction of lignocellulosic biomass. Biological processes that use pentose-rich biomass as the sole carbon source will help to minimise raw material prices while also ensuring process sustainability.
Xylose - an overview | ScienceDirect Topics
The xylose isomerase converts the sugar into xylulose, which can be metabolized by the yeast. Once this was accomplished, oxygen-limited and anaerobic batch enrichment in the presence of high-xylose concentrations led to the selection of mutants that grew faster on xylose and eventually they ended up with a mutant that grew anaerobically on xylose.
Xylose - an overview | ScienceDirect Topics
Xylose fermentation by native S. cerevisiae is restricted by two major metabolic bottlenecks. The first bottleneck is the lack of xylose-specific transporters that compels extracellular xylose to be transported through native hexose transporters that have substantially higher affinities for hexoses than pentoses [73]. Consequently, xylose is ...
Versatile xylose and arabinose genetic switches development for …
2025年1月1日 · For xylose induction systems, both XlnR- and XylR-based single-mode systems showed a steep response in the range of 0.1–1 m M xylose, indicating good cooperativity (n xlnR = 2.0; n xylR = 3.7); besides, their EC50 are both approximately 1 m M, while the arabinose biosensors required an order of magnitude greater amount of inducer for half ...
An overview of xylose valorization through its conversion into high ...
2024年11月1日 · Specifically, regarding xylose metabolism in yeast, the most explored genetic modification strategy, which serves as the basis for the adoption of new strategies, is the heterologous expression of key metabolic enzymes for the conversion of xylose into intermediates of its metabolism, notably xylose reductase (encoded by the XYL1 gene), xylitol ...
Advanced technological approaches and market status analysis of …
Xylose is metabolized primarily through three distinct pathways: (i) the isomerase pathway, (ii) the oxidoreductase pathway, and (iii) the oxidative pathway. The xylose metabolic network is depicted in Fig. 1 (Domingues et al., 2021). The isomerase pathway is typically utilized by prokaryotes, such as E. coli, Bacillus sp., and Lactobacillus sp ...
Xylose - an overview | ScienceDirect Topics
Xylose can also be converted to xylulose using the enzyme xylose isomerase, and traditional yeasts can ferment xylulose to ethanol (Gong et al., 1981; Hahn-Hägerdal et al., 1986). Xylose can be converted into xylitol, a potentially attractive sweetening agent, by a variety of microorganisms (yeasts, fungi and bacteria) ( Nigam and Singh, 1995 ...
Xylose Isomerase - an overview | ScienceDirect Topics
Xylose isomerase (d-xylose ketol-isomerase) catalyzes the isomerisation reaction of D-xylose into xylulose. This is initial step of xylose metabolism in microbial cell physiologies (Wovcha et al., 1983). Xylose isomerases are also referred to as glucose isomerases because of their capability to exchange d-glucose into d-fructose.