The use of extracellular enzymes from Streptomyces albus ATCC 3005 for the bleaching of eucalyptus kraft pulp

Antonopoulos, V T; Hernández, Manuel; Arias, Mauricio; Mavrakos, Emmanouil; Ball, Andrew S.

doi:10.1007/s002530100740

Cited by 33 publications

(1 citation statement)

References 26 publications

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“…Biobleaching is the bleaching of pulps using ligninolytic microorganisms or enzymes that reduce the amount of chemical bleach required to obtain a desirable brightness of pulps. Some enzymes from fungi and bacteria, such as extracellular xylanase and peroxidase from Streptomyces sp [22] , [23] , laccase and manganese peroxidase produced by Trametes versicolor [24] , [25] , have been studied for biobleaching of paper pulp and other industrial applications, as they degraded lignin or xylan and decolorized the pulp [26] , [27] . However, no DyP-type peroxidase enzymes has been characterized and applied in the pulp bleaching field.…”

Section: Introductionmentioning

confidence: 99%

Application of a Novel Alkali-Tolerant Thermostable DyP-Type Peroxidase from Saccharomonospora viridis DSM 43017 in Biobleaching of Eucalyptus Kraft Pulp

Liu

Huang

et al. 2014

PLoS ONE

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Saccharomonospora viridis is a thermophilic actinomycete that may have biotechnological applications because of its dye decolorizing activity, though the enzymatic oxidative system responsible for this activity remains elusive. Bioinformatic analysis revealed a DyP-type peroxidase gene in the genome of S. viridis DSM 43017 with sequence similarity to peroxidase from dye-decolorizing microbes. This gene, svidyp, consists of 1,215 bp encoding a polypeptide of 404 amino acids. The gene encoding SviDyP was cloned, heterologously expressed in Escherichia coli, and then purified. The recombinant protein could efficiently decolorize several triarylmethane dyes, anthraquinonic and azo dyes under neutral to alkaline conditions. The optimum pH and temperature for SviDyP was pH 7.0 and 70°C, respectively. Compared with other DyP-type peroxidases, SviDyP was more active at high temperatures, retaining>63% of its maximum activity at 50–80°C. It also showed broad pH adaptability (>35% activity at pH 4.0–9.0) and alkali-tolerance (>80% activity after incubation at pH 5–10 for 1 h at 37°C), and was highly thermostable (>60% activity after incubation at 70°C for 2 h at pH 7.0). SviDyP had an accelerated action during the biobleaching of eucalyptus kraft pulp, resulting in a 21.8% reduction in kappa number and an increase of 2.98% (ISO) in brightness. These favorable properties make SviDyP peroxidase a promising enzyme for use in the pulp and paper industries.

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Section: Introductionmentioning

confidence: 99%

Application of a Novel Alkali-Tolerant Thermostable DyP-Type Peroxidase from Saccharomonospora viridis DSM 43017 in Biobleaching of Eucalyptus Kraft Pulp

Liu

Huang

et al. 2014

PLoS ONE

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Effect of Bacillus circulans D1 Thermostable Xylanase on Biobleaching of Eucalyptus Kraft Pulp

Bocchini

Damiano

Gomes

et al. 2003

Biotechnology for Fuels and Chemicals

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Effect of carbohydrates on the production of thaxtomin A by Streptomyces acidiscabies

et al. 2007

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Several Streptomyces species cause plant diseases, including S. scabies, S. acidiscabies and S. turgidiscabies, which produce common scab of potato and similar diseases of root crops. These species produce thaxtomins, dipeptide phytotoxins that are responsible for disease symptoms. Thaxtomins are produced in vivo on diseased potato tissue and in vitro in oat-based culture media, but the regulation of thaxtomin biosynthesis is not understood. S. acidiscabies was grown in a variety of media to assess the impact of medium components on thaxtomin A (ThxA) production. ThxA biosynthesis was not correlated with bacterial biomass, nor was it stimulated by alpha-solanine or alpha-chaconine, the two most prevalent potato glycoalkaloids. ThxA production was stimulated by oat bran broth, even after exhaustive extraction, suggesting that specific carbohydrates may influence ThxA biosynthesis. Oat bran contains high levels of xylans and glucans, and both of these carbohydrates, as well as xylans from wheat and tamarind, stimulated ThxA production, but not to the same extent as oat bran. Starches and simple sugars did not induce ThxA production. The data indicate that complex carbohydrates may act as environmental signals to plant pathogenic Streptomyces, allowing production of thaxtomin and enabling bacteria to colonize its host.

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The use of extracellular enzymes from Streptomyces albus ATCC 3005 for the bleaching of eucalyptus kraft pulp

Cited by 33 publications

References 26 publications

Application of a Novel Alkali-Tolerant Thermostable DyP-Type Peroxidase from Saccharomonospora viridis DSM 43017 in Biobleaching of Eucalyptus Kraft Pulp

Application of a Novel Alkali-Tolerant Thermostable DyP-Type Peroxidase from Saccharomonospora viridis DSM 43017 in Biobleaching of Eucalyptus Kraft Pulp

Effect of Bacillus circulans D1 Thermostable Xylanase on Biobleaching of Eucalyptus Kraft Pulp

Effect of carbohydrates on the production of thaxtomin A by Streptomyces acidiscabies

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