Structural Variation and Content of Arabinoxylans in Endosperm and Bran of Durum Wheat (<i>Triticum turgidum</i> L.)

Marcotuli, Ilaria; Hsieh, Yves S. Y.; Lahnstein, Jelle; Yap, Kuok; Burton, Rachel A.; Blanco, Antonio; Fincher, Geoffrey B.; Gadaleta, Ágata

doi:10.1021/acs.jafc.6b00103

Cited by 50 publications

(26 citation statements)

References 46 publications

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“…As explained above, aleurone is part of the bran. About 25% of AX are found in the starchy endosperm, 25% in aleurone and the remaining 50% are found in the other outer tissues of the grain [35]. Most AX in wheat bran are water-insoluble because of ferulic acid residues establishing crosslinks between AX and adjacent units of lignin [36].…”

Section: Arabinoxylans (Ax)mentioning

confidence: 99%

Nutritional interest of dietary fiber and prebiotics in obesity: Lessons from the MyNewGut consortium

et al. 2020

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s u m m a r yThe aim of EU project MyNewGut is to contribute to future public health-related recommendations supported by new insight in gut microbiome and nutrition-host relationship. In this Opinion Paper, we first revisit the concept of dietary fiber, taking into account their interaction with the gut microbiota. This paper also summarizes the main effects of dietary fibers with prebiotic properties in intervention studies in humans, with a particular emphasis on the effects of arabinoxylans and arabinoxylo-oligosaccharides on metabolic alterations associated with obesity. Based on the existing state of the art and future development, we elaborate the steps required to propose dietary guidelines related to dietary fibers, taking into account their interaction with the gut microbiota.

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Section: Arabinoxylans (Ax)mentioning

confidence: 99%

Nutritional interest of dietary fiber and prebiotics in obesity: Lessons from the MyNewGut consortium

et al. 2020

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“…Arabinoxylans are paramount component of the dietary fiber in cereals and belong to the group of NSP. [76,77] They are major NSP present in endosperm and outer layers of cereals mainly wheat grains constituting cell wall of various types of cereal grains. [54,[78][79][80][81] About 70% of the cell wall's NSP are arabinoxylans.…”

Section: Arabinoxylansmentioning

confidence: 99%

“…Thirty-seven percentage of starchy endosperm arabinoxylans was soluble in water. [76] Arabinoxylans on the basis of structural and conformational-based extraction properties is classified into two categories including water-extractable arabinoxylans (WEAX) and water-unextractable arabinoxylans (WUEAX). [82,83] Total arabinoxylans and water-extractable arabinoxylans content in common wheat are 6.7% and 0.7%, respectively, and the hard wheat varieties possess considerably higher contents than soft wheat cultivars.…”

Section: Arabinoxylansmentioning

confidence: 99%

“…Arabinoxylans are one group of dietary fiber components in cereal grains, and specific health benefits have been linked with their molecular fine structures and hence with physicochemical properties, such as solubility in aqueous media. [76] β-glucan is a very valuable functional ingredient and which distributes widely in various cereals, such as oat, barley, and wheat. [98,104] It is clear that in some cases, these (1,3;1,4)-ß-glucans function as a major store of metabolizable glucose in the grain.…”

Section: Health-endorsing Effectsmentioning

confidence: 99%

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Functional and health-endorsing properties of wheat and barley cell wall’s non-starch polysaccharides

Ain

Saeed

Ahmad

et al. 2018

International Journal of Food Properties

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Cereals have captured global importance owing to the presence of bioactive moieties in cell wall. Numerous components have been considered but non-starch polysaccharides (NSP) of cereals cell wall are of prime concern. In this comprehensive review, the basic aim is to elaborate the functional and nutritional importance of cereals cell wall with special reference to NSP. Among bioactive components of cell wall, NSP, such as arabinoxylans, ßglucans, and arabinogalactans of wheat and barley, have gained much importance. Moreover, literature revealed that NSP have greater role as prebiotic, immunomodulator, antioxidant, anti-diabetic, and cardio-protector as well as major food applications.

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“…In contrast to cellulose, which is a highly homogeneous polysaccharide composed of -1,4-linked glucose molecules, hemicellulose and pectin are predominantly hetero-polysaccharides in which the recalcitrant backbone is very often decorated with arabinosecontaining side chains (Burton & Fincher, 2014a). Arabinoxylans are ubiquitous in the primary and secondary cell walls of monocots and consist of a backbone of -1,4-linked xylose residues decorated at O2 and/or O3 with l-arabinofuranosyl units (Marcotuli et al, 2016). In contrast, the pectic polysaccharide rhamnogalacturan I consists of a backbone of the repeating disaccharide 4--d-galacturonic acid-1,2--l-rhamnose-1 extensively decorated with a variety of oligosaccharides, of which arabinan is the most abundant (Park et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Molecular determinants of substrate specificity revealed by the structure ofClostridium thermocellumarabinofuranosidase 43A from glycosyl hydrolase family 43 subfamily 16

Goyal

Ahmed

Sharma

et al. 2016

Acta Cryst Sect D Struct Biol

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The recent division of the large glycoside hydrolase family 43 (GH43) into subfamilies offers a renewed opportunity to develop structure-function studies aimed at clarifying the molecular determinants of substrate specificity in carbohydrate-degrading enzymes. α-L-Arabinofuranosidases (EC 3.2.1.55) remove arabinose side chains from heteropolysaccharides such as xylan and arabinan. However, there is some evidence suggesting that arabinofuranosidases are substrate-specific, being unable to display a debranching activity on different polysaccharides. Here, the structure of Clostridium thermocellum arabinofuranosidase 43A (CtAbf43A), which has been shown to act in the removal of arabinose side chains from arabinoxylan but not from pectic arabinan, is reported. CtAbf43A belongs to GH43 subfamily 16, the members of which have a restricted capacity to attack xylans. The crystal structure of CtAbf43A comprises a five-bladed β-propeller fold typical of GH43 enzymes. CtAbf43A displays a highly compact architecture compatible with its high thermostability. Analysis of CtAbf43A along with the other member of GH43 subfamily 16 with known structure, the Bacillus subtilis arabinofuranosidase BsAXH-m2,3, suggests that the specificity of subfamily 16 for arabinoxylan is conferred by a long surface substrate-binding cleft that is complementary to the xylan backbone. The lack of a curved-shaped carbohydrate-interacting platform precludes GH43 subfamily 16 enzymes from interacting with the nonlinear arabinan scaffold and therefore from deconstructing this polysaccharide.

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Structural Variation and Content of Arabinoxylans in Endosperm and Bran of Durum Wheat (Triticum turgidum L.)

Cited by 50 publications

References 46 publications

Nutritional interest of dietary fiber and prebiotics in obesity: Lessons from the MyNewGut consortium

Nutritional interest of dietary fiber and prebiotics in obesity: Lessons from the MyNewGut consortium

Functional and health-endorsing properties of wheat and barley cell wall’s non-starch polysaccharides

Molecular determinants of substrate specificity revealed by the structure ofClostridium thermocellumarabinofuranosidase 43A from glycosyl hydrolase family 43 subfamily 16

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