Optimization and comparative studies on activities of β-mannanase from newly isolated fungal and its mutant

Khattab, Om Kalthoum H.; Ismail, S. I.; Abosereh, Nivien A.; Abo-Elnasr, Amany A; Nour, Shaimaa A.; Hashem, Ahmed M.

doi:10.4103/epj.epj_48_19

Cited by 3 publications

(1 citation statement)

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“…Several studies have shown enhanced production of β-mannanase through process optimization. Approaches such as one factor at a time have been employed to improve production (Olaniyi et al, 2013;Khattab et al, 2020). Statistical methods like central composite design, Box Behnken and placket Burman or their combination have also been used to enhance the production of β-mannanase (Abd Rashid et al, 2012;Yatmaz et al, 2016;Jana et al, 2018;Blibech et al, 2020).…”

Section: Production Yield Improvement and Purification Of β-Mannanasesmentioning

confidence: 99%

Applications of Microbial β-Mannanases

Dawood

2020

Front. Bioeng. Biotechnol.

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Mannans are main components of hemicellulosic fraction of softwoods and they are present widely in plant tissues. β-mannanases are the major mannan-degrading enzymes and are produced by different plants, animals, actinomycetes, fungi, and bacteria. These enzymes can function under conditions of wide range of pH and temperature. Applications of β-mannanases have therefore, been found in different industries such as animal feed, food, biorefinery, textile, detergent, and paper and pulp. This review summarizes the most recent studies reported on potential applications of β-mannanases and bioengineering of β-mannanases to modify and optimize their key catalytic properties to cater to growing demands of commercial sectors.

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Section: Production Yield Improvement and Purification Of β-Mannanasesmentioning

confidence: 99%

Applications of Microbial β-Mannanases

Dawood

2020

Front. Bioeng. Biotechnol.

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Successive approach of medium optimization using one-factor-at-a-time and response surface methodology for improved β-mannanase production from Streptomyces sp.

Bhaturiwala

Bagban

Mansuri

et al. 2022

Bioresource Technology Reports

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A local Talaromyces atroroseus TRP-NRC isolate: isolation, genetic improvement, and biotechnological approach combined with LC/HRESI-MS characterization, skin safety, and wool fabric dyeing ability of the produced red pigment mixture

Salim

Fadel

Youssef

et al. 2022

Journal of Genetic Engineering and Biotechnology

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Background During the last decade, enormous research efforts have been directed at identifying potent microorganisms as sustainable green cell factories for eco-friendly pigments. Talaromyces atroroseus has recently been shown to excrete large amounts of azaphilone mycotoxin-free red pigment mixture comprising some known coloring components together with many uncharacterized metabolites. In this study, a new Talaromyces atroroseus isolate was identified via sequencing of the fragment of the nuclear ribosomal gene cluster containing internal transcribed spacers and 5.8S rRNA gene. The parameters that affected the level of pigment production were optimized in uncommon static conditions of culture and genetic improvement, via γ-irradiation, to improve pigment yield. Moreover, chemical characterization using LC/MS and skin safety test of the target pigment mixture were precisely conducted to maximize its benefits as a natural and safe red pigment for wool fabrics. Results Molecular identification via the sequencing of the ITS of the rDNA encoding gene cluster revealed that the fungal isolate TRP-NRC was T. atroroseus TRP-NRC (deposited in GenBank under accession number MW282329). In the static conditions of culture, pigment production was dramatically enhanced to 27.36 g/L in an optimum yeast malt peptone medium of 2% mannitol at pH 2−4.5 and 30 °C for 7 days of incubation. Under exposure to a 400-Gy γ-radiation dose, pigment yield was increased to a 3-fold level higher than that recorded for the wild type. Based on the inter-simple sequence repeats (ISSR), as a molecular marker tool, the wild-type T. atroroseus TRP-NRC strain and its mutants were discriminated. The UHPLC/HRESI-MS analytical tool characterized 60 metabolites, including many unknown molecules, at appropriate concentrations. It is worthy to note that four mitorubrin derivatives were identified for the first time in T. atroroseus, i.e., mitorubrinolamine acetate, dihydro-PP-O, mitorobrinal, and mitorubrinol. The range of irritation indexes (0−0.1) demonstrated an adequate skin safety after the direct local application of the pigment mixture. Finally, the pigment mixture exhibited a remarkably good dyeing ability in wool fabrics, with high-fastness properties. Conclusions Because of its sustainable and economic production, the target red pigment mixture may be applied in the future in textile, food, cosmetics, or different pharmaceutical industries after extensive conventional safety and toxicity studies, which are currently under consideration.

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Optimization and comparative studies on activities of β-mannanase from newly isolated fungal and its mutant

Cited by 3 publications

References 1 publication

Applications of Microbial β-Mannanases

Applications of Microbial β-Mannanases

Successive approach of medium optimization using one-factor-at-a-time and response surface methodology for improved β-mannanase production from Streptomyces sp.

A local Talaromyces atroroseus TRP-NRC isolate: isolation, genetic improvement, and biotechnological approach combined with LC/HRESI-MS characterization, skin safety, and wool fabric dyeing ability of the produced red pigment mixture

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