Physical and Chemical Characteristics of Glycopeptide from Wood Decay Fungi

Enoki, Akio; Tanaka, H; Itakura, Shuji; Goodell, Barry; Nicholas, Darrel D.; Schultz, Tor P.

doi:10.1021/bk-2003-0845.ch008

Cited by 12 publications

(8 citation statements)

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“…To perform the complete catalytic cycle, oxidized saccharidic moieties of the glycopeptides have to be reduced again. This can potentially be performed by a cell wall‐associated reductase that is most probably NADH‐dependent (Enoki et al , 2003). However, the identity of the electron donor is not yet known.…”

Section: Glycopeptide‐catalysed Fenton Reactionmentioning

confidence: 99%

Degradation of cellulose by basidiomycetous fungi

2008

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Cellulose is the main polymeric component of the plant cell wall, the most abundant polysaccharide on Earth, and an important renewable resource. Basidiomycetous fungi belong to its most potent degraders because many species grow on dead wood or litter, in environment rich in cellulose. Fungal cellulolytic systems differ from the complex cellulolytic systems of bacteria. For the degradation of cellulose, basidiomycetes utilize a set of hydrolytic enzymes typically composed of endoglucanase, cellobiohydrolase and beta-glucosidase. In some species, the absence of cellobiohydrolase is substituted by the production of processive endoglucanases combining the properties of both of these enzymes. In addition, systems producing hydroxyl radicals based on cellobiose dehydrogenase, quinone redox cycling or glycopeptide-based Fenton reaction are involved in the degradation of several plant cell wall components, including cellulose. The complete cellulolytic complex used by a single fungal species is typically composed of more than one of the above mechanisms that contribute to the utilization of cellulose as a source of carbon or energy or degrade it to ensure fast substrate colonization. The efficiency and regulation of cellulose degradation differs among wood-rotting, litter-decomposing, mycorrhizal or plant pathogenic fungi and yeasts due to the different roles of cellulose degradation in the physiology and ecology of the individual groups.

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Section: Glycopeptide‐catalysed Fenton Reactionmentioning

confidence: 99%

Degradation of cellulose by basidiomycetous fungi

2008

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“…Brown-rot fungi can degrade crystalline cellulose in wood (Cowling 1961;Kirk 1973) and cause rapid de-polymerization of cellulose in wood before losses in total wood substance are detected. Although these fungi can also degrade lignin, they preferentially metabolize the cellulose (the S 2 layer of wood cell wall in the early stages of degradation of wood is degraded extensively) and hemicellulose, leaving an amorphous, brown, crumbly residue that is rich in lignin (Highley 1987;Enoki et al 1988). It can be postulated that because cellulose and hemicellulose are play an important role in increase of wood strength, this can explain why the hardness of brownrotted BPC samples was lower than white-rotted BPC samples.…”

Section: Resultsmentioning

confidence: 99%

Decay resistance, hardness, water absorption, and thickness swelling of a bagasse fiber/plastic composite

Hosseinihashemi

Modirzare

Safdari

et al. 2011

BioRes

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The decay resistance, hardness, water absorption, and thickness swelling of a bagasse fiber/polypropylene composite were evaluated. Brown- (Coniophora puteana) and white-rot (Trametes versicolor) fungal treatments were applied for 8, 12, and 16 weeks according to BS 838:1961 with the kolle-flask method. The brown- and white-rotted, and control composite samples were immersed in distilled water at 2 h and 24 h to measure the water absorption and thickness swelling of samples according to the ASTM D 570-98 requirements. Results indicated that the both lowest (3.2%) and the highest (7.2%) weight loss were observed in the white-rotted composite samples for 8 and 16 weeks fungal exposure times, respectively. The highest hardness (77.6 Shore D) was noted in the control composite samples, and the lowest hardness (65.5 Shore D) was recorded in the white-rotted composite samples. The highest water absorption (10.5%) was observed in the brown-rotted composite samples for 8 weeks fungal exposure time and after 24 h immersion in distilled water, and the lowest (3.8%) was noted in the control composite samples after 2 h immersion in distilled water. The highest thickness swelling (6.3%) was observed in the control composite samples after 24 h immersion in distilled water, and the lowest thickness swelling (1.9%) was found in the white-rotted composite samples for 16 weeks fungal exposure time and after 2 h immersion in distilled water.

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“…This type of enzyme is capable to oxidise aromatic alcohols to the corresponding aldehydes by concomitantly reducing oxygen to H 2 O 2 and is found in many wood-degrading fungi (Muheim et al 1990, Asada et al 1995, Barrasa et al 1998, Varela et al 2000, Kim et al 2001. Furthermore, a new group of small Fe 2+ -containing glycoproteins has recently been reported to catalyse redox reactions between an electron donor, such as NADH, and O 2 in order to produce H 2 O 2 and to reduce H 2 O 2 to OH • (Tanaka et al 1996, Enoki et al 2003. Another novel small peptide from P. chrysosporium (Pc factor) has phenol oxidase activity and reduces Fe 3+ to Fe 2+ but appears not to form OH • , showing that the list of fungal oxidoreductases with potential functions in lignocellulose degrading is likely not completed.…”

Section: Other Oxidoreductasesmentioning

confidence: 99%

Wood production, wood technology, and biotechnological impacts

Kües¹

2007

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Physical and Chemical Characteristics of Glycopeptide from Wood Decay Fungi

Cited by 12 publications

References 0 publications

Degradation of cellulose by basidiomycetous fungi

Degradation of cellulose by basidiomycetous fungi

Decay resistance, hardness, water absorption, and thickness swelling of a bagasse fiber/plastic composite

Wood production, wood technology, and biotechnological impacts

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