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Salas-Veizaga DM, Rocabado-Villegas LR, Linares-Pastén JA, Gudmundsdottir EE, Hreggvidsson GO, Álvarez-Aliaga MT, Adlercreutz P, Nordberg Karlsson E. A novel glycoside hydrolase 43-like enzyme from Clostridium boliviensis is an endo-xylanase and a candidate for xylooligosaccharide production from different xylan substrates. Appl Environ Microbiol 2024; 90:e0222323. [PMID: 38497645 PMCID: PMC11022575 DOI: 10.1128/aem.02223-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Accepted: 02/09/2024] [Indexed: 03/19/2024] Open
Abstract
An uncharacterized gene encoding a glycoside hydrolase family 43-like enzyme from Clostridium boliviensis strain E-1 was identified from genomic sequence data, and the encoded enzyme, CbE1Xyn43-l, was produced in Escherichia coli. CbE1Xyn43-l (52.9 kDa) is a two-domain endo-β-xylanase consisting of a C-terminal CBM6 and a GH43-like catalytic domain. The positions of the catalytic dyad conserved in GH43, the catalytic base (Asp74), and proton donor (Glu240) were identified in alignments including GH43-enzymes of known 3D-structure from different subfamilies. CbE1Xyn43-l is active at pH 7.0-9.0, with optimum temperature at 65°C, and a more than 7 days' half-life in irreversible deactivation studies at this temperature. The enzyme hydrolyzed birchwood xylan, quinoa stalks glucuronoarabinoxylan, and wheat arabinoxylan with xylotriose and xylotetraose as major hydrolysis products. CbE1Xyn43-l also released xylobiose from pNPX2 with low turnover (kcat of 0.044 s-1) but was inactive on pNPX, showing that a degree of polymerization of three (DP3) was the smallest hydrolyzable substrate. Divalent ions affected the specific activity on xylan substrates, which dependent on the ion could be increased or decreased. In conclusion, CbE1Xyn43-l from C. boliviensis strain E-1 is the first characterized member of a large group of homologous hypothetical proteins annotated as GH43-like and is a thermostable endo-xylanase, producing xylooligosaccharides of high DP (xylotriose and xylotetraose) producer. IMPORTANCE The genome of Clostridium boliviensis strain E-1 encodes a number of hypothetical enzymes, annotated as glycoside hydrolase-like but not classified in the Carbohydrate Active Enzyme Database (CAZy). A novel thermostable GH43-like enzyme is here characterized as an endo-β-xylanase of interest in the production of prebiotic xylooligosaccharides (XOs) from different xylan sources. CbE1Xyn43-l is a two-domain enzyme composed of a catalytic GH43-l domain and a CBM6 domain, producing xylotriose as main XO product. The enzyme has homologs in many related Clostridium strains which may indicate a similar function and be a previously unknown type of endo-xylanase in this evolutionary lineage of microorganisms.
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Affiliation(s)
- Daniel Martin Salas-Veizaga
- Division of Biotechnology, Department of Chemistry, Lund University, Lund, Sweden
- Instituto de Investigaciones Fármaco Bioquímicas, Universidad Mayor de San Andrés, La Paz, Bolivia
| | | | | | | | | | | | - Patrick Adlercreutz
- Division of Biotechnology, Department of Chemistry, Lund University, Lund, Sweden
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Oz Tuncay F, Cakmak U, Kolcuoglu Y. Aqueous two-phase extraction and characterization of thermotolerant alkaliphilic Cladophora hutchinsiae xylanase: biochemical properties and potential applications in fruit juice clarification and fish feed supplementation. Prep Biochem Biotechnol 2024; 54:553-563. [PMID: 37668166 DOI: 10.1080/10826068.2023.2253469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/06/2023]
Abstract
Xylanase finds extensive applications in diverse biotechnological fields such as biofuel production, pulp and paper industry, baking and brewing industry, food and feed industry, and deinking of waste paper. Here, polyethylene glycol (PEG)-phosphate aqueous two-phase system (ATPS) was applied for the purification of an alkaline active and thermotolerant xylanase from a marine source, Cladophora hutchinsiae (C. hutchinsiae). In the purification process, the effects of some experimental factors such as PEG concentration and PEG molar mass, potassium phosphate(K2HP04) concentration, and pH on xylanase distribution were systematically investigated. Relative enzymatic activity and purification factor obtained were 93.21% and 7.18, respectively. A single protein band of 28 kDa was observed on SDS-PAGE. The optimum temperature and pH of xylanase with beechwood xylan were 30 °C and 9.0, respectively. The Lineweaver-Burk graph was utilized to determine the Km (4.5 ± 0.8 mg/mL), Vmax (0.04 ± 0.01 U) and kcat (0.001 s-1) values of the enzyme. It was observed that the purified xylanase maintained 70% of its activity at 4 °C and was found stable at pH 4.0 by retaining almost all of its activity. Enzymatic activity was slightly enhanced with Na+, K+, Ca2+ and acetone. The highest increase in the reducing sugar amount was 53.6 ± 3.8, for orange juice at 50 U/mL enzyme concentration.
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Affiliation(s)
- Fulya Oz Tuncay
- Department of Chemistry, Karadeniz Technical University, Trabzon, Turkey
| | - Ummuhan Cakmak
- Department of Chemistry, Karadeniz Technical University, Trabzon, Turkey
| | - Yakup Kolcuoglu
- Department of Chemistry, Karadeniz Technical University, Trabzon, Turkey
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Fernandes de Souza H, Aguiar Borges L, Dédalo Di Próspero Gonçalves V, Vitor dos Santos J, Sousa Bessa M, Fronja Carosia M, Vieira de Carvalho M, Viana Brandi I, Setsuko Kamimura E. Recent advances in the application of xylanases in the food industry and production by actinobacteria: a review. Food Res Int 2022; 162:112103. [DOI: 10.1016/j.foodres.2022.112103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Revised: 10/26/2022] [Accepted: 10/28/2022] [Indexed: 11/09/2022]
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Omisore SO, Fabunmi TB, Ayodeji AO, Olaniyi OO, Arotupin DJ. Production and biochemical characterization of partially purified cellulase-free, thermo-acidophilic endoxylanase from Lysinibacillus fusiformis strain TB7 using kolanut husk as feedstock. Heliyon 2022; 8:e11106. [PMID: 36281386 PMCID: PMC9586915 DOI: 10.1016/j.heliyon.2022.e11106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 03/25/2022] [Accepted: 10/11/2022] [Indexed: 10/29/2022] Open
Abstract
Xylanases have become very important enzymes in many industrial processes for the valorization of xylan-rich lignocellulosic wastes. Here, some physicochemical and kinetic properties of a purified endoxylanase produced on kolanut husk-based medium by Lysinibacillus fusiformis are presented. The crude enzyme solution was first subjected to precipitation with solid ammonium sulphate and further purified on DEAE-Sephadex A-50 anion-exchange and Sephadex G-100 gel filtration columns chromatography prior to biochemical characterization. The purified endoxylanase was 21 kDa as determined by sodium dodecyl sulphate polyacrylamide gel electrophoresis (SDS-PAGE) and was thermostable, exhibiting optimum activity at 60 °C and pH 5.0. The K m and V max were respectively estimated to be 29.5 mg/ml and 125 μmol/min/ml using Birchwood xylan as substrate. Activity of the enzyme was enhanced by Na+, Ca2+, Mn2+, Mg2+ and K+ at concentration of 5 mM but inhibited by Hg2+, Cu2+, Pb2+, Fe3+, EDTA, SDS and Urea. The purified endoxylanase showed high hydrolytic activity on Birchwood xylan and kolanut husk but extremely poor or no activity on carboxymethyl cellulose, starch or pectin. This L. fusiformis strain TB7 endoxylanase has desirable properties useful for biotechnological applications in laundry, fuels, feeds, paper and pulp industries.
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Affiliation(s)
- Suliat Olatidayo Omisore
- Department of Microbiology, Federal University of Technology, P.M.B. 704, Akure, Nigeria,Corresponding author.
| | - Temitope Bukola Fabunmi
- Department of Microbiology, Federal University of Technology, P.M.B. 704, Akure, Nigeria,Department of Biological Sciences, Achievers University, P.M.B. 001, Owo, Nigeria
| | - Adeyemi Oluwadare Ayodeji
- Department of Biochemistry, Federal University of Technology, P.M.B. 704, Akure, Nigeria,Department of Chemical Sciences, Biochemistry Unit, Joseph Ayo Babalola University, Ikeji-Arakeji, P.M.B. 5006, Ilesha, Nigeria
| | | | - Daniel Juwon Arotupin
- Department of Microbiology, Federal University of Technology, P.M.B. 704, Akure, Nigeria
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Isolation and Molecular Identification of Xylanase-Producing Bacteria from Ulva flexuosa of the Persian Gulf. Processes (Basel) 2022. [DOI: 10.3390/pr10091834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The marine ecosystem is one of the richest sources of biologically active compounds, such as enzymes, among which seaweed is one of the most diverse marine species and has a rich diversity of bacteria that produce different enzymes. Among these, the bacteria-derived xylanase enzyme has many applications in the fruit juice, paper, and baking industries; so, to consider the economic value of the xylanase enzyme and the isolation and identification of xylanase-producing bacteria is of particular importance. In this study, specimens of the alga Ulva flexuosa species were collected from the coasts of Bandar Abbas and Qeshm Island. The bacteria coexisting with the algae were isolated using a nutrient agar medium. The bacteria producing the xylanase enzyme were then screened by a specific solid culture medium containing xylan, and the activity of the xylanase enzyme isolated from the bacteria was measured using a xylan substrate. The bacteria with the highest enzymatic activity were selected and identified by 16S rRNA gene sequence analysis, and the culture medium conditions for the enzyme production by the selected bacterial strains were optimized. Among the bacterial community, two strains with the highest xylanase activity, which belonged to the genera Bacillus and Shewanella, were identified as Bacillus subtilis strain HR05 and Shewanella algae strain HR06, respectively. The two selected bacteria were registered in the NCBI gene database. The results demonstrated that the two selected strains had different optimal growing conditions in terms of pH and temperature, as well as the sources of carbon and nitrogen for enzyme production. It seems that the xylanase enzyme isolated from the bacterial strains HR05 and HR06, which coexist with alga Ulva flexousa, could be potential candidates for biotechnology and various industries, such as pulp production, paper, and food manufacture, due to their high activity and optimal alkaline pH.
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Tian Y, Xu J, Shi J, Kong M, Guo C, Cui C, Wang Y, Wang Y, Zhou C. Cloning, Expression, and Characterization of a GHF 11 Xylanase from Alteromonas macleodii HY35 in Escherichia coli. J GEN APPL MICROBIOL 2022; 68:134-142. [PMID: 35965062 DOI: 10.2323/jgam.2021.10.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
A xylanase gene xynZT-1 from Alteromonas macleodii HY35 was cloned and expressed in Escherichia coli (E. coli). The sequencing results showed that the ORF of xynZT-1 was 831 bp. The xylanase DNA sequence encoded a 29 amino acids (aa) signal peptide and a 247-aa mature peptide. The XynZT-1 has been a calculated molecular weight (MW) of 27.93 kDa, isoelectric point (pI) of 5.11 and the formula C1266H1829N327O384S5. The amino acid sequence of the xynZT-1 had a high similarity with that of glycosyl hydrolase family 11 (GHF11) reported from other microorganisms. The DNA sequence encoding mature peptide was subcloned into pET-28a(+) expression vector. The resulted plasmid pET-28a-xynZT-1 was transformed into E. coli BL21(DE3), and the recombinant strain BL21(DE3)/xynZT-1 was obtained. The optimum temperature and pH of the recombinant XynZT-1 were 45 ℃ and 5.0, respectively.
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Affiliation(s)
- Yanjie Tian
- Synthetic Biology Engineering Laboratory of Henan Province, School of Life Science and Technology, Xinxiang Medical University
| | - Jia Xu
- Synthetic Biology Engineering Laboratory of Henan Province, School of Life Science and Technology, Xinxiang Medical University
| | - Jianing Shi
- Synthetic Biology Engineering Laboratory of Henan Province, School of Life Science and Technology, Xinxiang Medical University
| | - Mengyuan Kong
- Synthetic Biology Engineering Laboratory of Henan Province, School of Life Science and Technology, Xinxiang Medical University
| | - Changjiang Guo
- Synthetic Biology Engineering Laboratory of Henan Province, School of Life Science and Technology, Xinxiang Medical University
| | - Caixia Cui
- Synthetic Biology Engineering Laboratory of Henan Province, School of Life Science and Technology, Xinxiang Medical University
| | - Yongtao Wang
- The First Affiliated Hospital, Xinxiang Medical University
| | - Yan Wang
- Synthetic Biology Engineering Laboratory of Henan Province, School of Life Science and Technology, Xinxiang Medical University
| | - Chenyan Zhou
- Synthetic Biology Engineering Laboratory of Henan Province, School of Life Science and Technology, Xinxiang Medical University
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Three-Step Purification and Characterization of Organic Solvent-Tolerant and Alkali-Thermo-Tolerant Xylanase from Bacillus paramycoides T4 [MN370035]. Catalysts 2022. [DOI: 10.3390/catal12070749] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
In the present study, an extracellular alkali-thermo-tolerant xylanase from Bacillus paramycoides was produced in the presence of an organic solvent. The enzyme was purified by ammonium sulphate precipitation, gel filtration, and ion exchange chromatography, with an overall recovery of 25.9%. The purified enzyme hada 70 kDa molecular weight (MW) confirmed by SDS-PAGE gel analysis. The maximum enzyme activity was reported at 55 °C and pH 7.0. Xylanase activity and stability were improved in the presence of 30% (v/v) n-dodecane, iso-octane, n-decane, and cyclohexane (7 days). The enzyme activity was improved by Co2+, EDTA, and Triton-X-100 while vigorously repressed by Hg2+ and Cu2+. The purified enzyme showed 1.473 mg/mL Km and 654.017 µg/mL/min Vmax values. The distinctive assets of the isolate verified the potential application in the field of biomass conversion into fuel and other industrial processes. Organic solvent-tolerant xylanases can be used for concurrent saccharification and bioethanol production, the amplification of intoxicating beverages, and the fermenting industry.
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Tan Y, Shan Y, Zheng R, Liu R, Sun C. Characterization of a Deep-Sea Actinobacterium Strain Uncovers Its Prominent Capability of Utilizing Taurine and Polyvinyl Alcohol. Front Microbiol 2022; 13:868728. [PMID: 35677903 PMCID: PMC9169050 DOI: 10.3389/fmicb.2022.868728] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Accepted: 03/17/2022] [Indexed: 11/13/2022] Open
Abstract
Actinobacteria represent a large group of important prokaryotes with great application potentials and widely distribute in diverse natural environments including the ocean. However, compared to their terrestrial cultured members, there are much less available marine Actinobacteria, especially deep-sea counterparts. Here, we cultured a bacterial strain of deep-sea actinobacterium, Marmoricola sp. TYQ2, by using a basal medium supplemented with taurine. Consistently, the growth of strain TYQ2 was significantly promoted by the supplement of taurine. Transcriptomic analysis showed that the expressions of genes encoding proteins associated with taurine metabolization and utilization as well as energy generation were evidently up-regulated when taurine was added. Moreover, strain TYQ2 was demonstrated to degrade polyvinyl alcohol (PVA) with the involvement of the redox cycle of extracellular quinol and quinone and the reduction of iron to ferrous, and strain TYQ2 could utilize the degradation products for energy production, thereby supporting bacterial growth. Overall, our experimental results demonstrate the prominent degradation capabilities of Marmoricola sp. TYQ2 toward the organics taurine and PVA.
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Affiliation(s)
- Yingqi Tan
- Chinese Academy of Sciences and Shandong Province Key Laboratory of Experimental Marine Biology and Center of Deep Sea Research, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
- College of Earth Science, University of Chinese Academy of Sciences, Beijing, China
- Center of Ocean Mega-Science, Chinese Academy of Sciences, Qingdao, China
| | - Yeqi Shan
- Chinese Academy of Sciences and Shandong Province Key Laboratory of Experimental Marine Biology and Center of Deep Sea Research, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
- College of Earth Science, University of Chinese Academy of Sciences, Beijing, China
- Center of Ocean Mega-Science, Chinese Academy of Sciences, Qingdao, China
| | - Rikuan Zheng
- Chinese Academy of Sciences and Shandong Province Key Laboratory of Experimental Marine Biology and Center of Deep Sea Research, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
- College of Earth Science, University of Chinese Academy of Sciences, Beijing, China
- Center of Ocean Mega-Science, Chinese Academy of Sciences, Qingdao, China
| | - Rui Liu
- Chinese Academy of Sciences and Shandong Province Key Laboratory of Experimental Marine Biology and Center of Deep Sea Research, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
- Center of Ocean Mega-Science, Chinese Academy of Sciences, Qingdao, China
| | - Chaomin Sun
- Chinese Academy of Sciences and Shandong Province Key Laboratory of Experimental Marine Biology and Center of Deep Sea Research, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
- College of Earth Science, University of Chinese Academy of Sciences, Beijing, China
- Center of Ocean Mega-Science, Chinese Academy of Sciences, Qingdao, China
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Revealing the Potential of Xylanase from a New Halophilic Microbulbifer sp. CL37 with Paper De-Inking Ability. ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING 2021. [DOI: 10.1007/s13369-021-06400-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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10
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kumar MS, Tamil Selven S, Sholkamy EN, Mostafa AA, Grasian I. Statistical Optimization of Biobleaching Efficacy of endo-β-1,4-xylanase from an Actinobacterium Streptomyces olivaceus (MSU3) in Comparison with Zinc Oxide Pretreated Sugarcane Bagasse Pulp Using Box–Behnken Design. SMART SCIENCE 2020. [DOI: 10.1080/23080477.2020.1769977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Muthusamy Sanjiv kumar
- MNP Laboratory, Centre for Marine Science and Technology, Manonmaniam Sundaranar University, Rajakkamangalam, Tamilnadu, India
| | | | - Essam N. Sholkamy
- Dept. Of Botany and Microbiology, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Ashraf A. Mostafa
- Dept. Of Botany and Microbiology, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Immanuel Grasian
- MNP Laboratory, Centre for Marine Science and Technology, Manonmaniam Sundaranar University, Rajakkamangalam, Tamilnadu, India
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Xylanases from marine microorganisms: A brief overview on scope, sources, features and potential applications. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2020; 1868:140312. [DOI: 10.1016/j.bbapap.2019.140312] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2019] [Revised: 10/31/2019] [Accepted: 11/05/2019] [Indexed: 01/10/2023]
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Bhardwaj N, Kumar B, Verma P. A detailed overview of xylanases: an emerging biomolecule for current and future prospective. BIORESOUR BIOPROCESS 2019. [DOI: 10.1186/s40643-019-0276-2] [Citation(s) in RCA: 144] [Impact Index Per Article: 28.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Abstract
Xylan is the second most abundant naturally occurring renewable polysaccharide available on earth. It is a complex heteropolysaccharide consisting of different monosaccharides such as l-arabinose, d-galactose, d-mannoses and organic acids such as acetic acid, ferulic acid, glucuronic acid interwoven together with help of glycosidic and ester bonds. The breakdown of xylan is restricted due to its heterogeneous nature and it can be overcome by xylanases which are capable of cleaving the heterogeneous β-1,4-glycoside linkage. Xylanases are abundantly present in nature (e.g., molluscs, insects and microorganisms) and several microorganisms such as bacteria, fungi, yeast, and algae are used extensively for its production. Microbial xylanases show varying substrate specificities and biochemical properties which makes it suitable for various applications in industrial and biotechnological sectors. The suitability of xylanases for its application in food and feed, paper and pulp, textile, pharmaceuticals, and lignocellulosic biorefinery has led to an increase in demand of xylanases globally. The present review gives an insight of using microbial xylanases as an “Emerging Green Tool” along with its current status and future prospective.
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Abdulla HM, El-Shatoury SA, El-Shahawy AA, Ghorab SA, Nasr M, Trujillo ME. An integrated bioaugmentation/electrocoagulation concept for olive mill wastewater management and the reuse in irrigation of biofuel plants: a pilot study. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:15803-15815. [PMID: 30953323 DOI: 10.1007/s11356-019-04893-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2018] [Accepted: 03/18/2019] [Indexed: 06/09/2023]
Abstract
A consortium of highly degrading microorganisms was used in an integrated bioaugmentation/electrocoagulation process for treating olive mill wastewater. The system was investigated for treating 1 m3 day-1, at a pilot scale, for 2 years; hydraulic loading rate and organic loading rate were 2880 l m-2 day-1 and 37,930 g COD m-2 day-1, respectively. Average removal efficiency for COD, oils, and total phenols was 63.9%, 85.2%, and 43.6%, respectively. The olive mill consortium, OMC, consisted of seven actinomycete strains. The strains were confirmed, by 16S rDNA analysis, to belong to five Streptomyces, one Kitasatospora, and one Micromonospora strains, at 100-99.06% similarities. Hydrolytic enzyme activities of OMC strains were remarkably higher for degrading cellulosic and lipid constituents (enzyme-cumulative indices, 14-16.1), than the phenolic constituents (indices, 4.1-6.5). The establishment of actinomycetes in the treatment system was indicated by their increased counts in the biofilm at the end of the biofilter, reaching 13-fold higher than that in the control bed. The treated effluent was toxic to the seedlings of Jatropha curcas (Jatropha) and Simmondsia chinensis (Jojoba). Though its application in irrigation of 3-year-old Jatropha shrubs, significantly, enhanced the fruit yield up to 1.85-fold higher than the control, without affecting the seed oil content, after 3-month application, the irrigated soil showed insignificant changes in its biochemical properties. This developed bioaugmentation/electrocoagulation process can treat wastewater with extremely high organic strength, while its approximate construction and operational costs are limited to 0.03 and 0.51 US$ m-3, respectively. It produces a treated effluent that can be reused in irrigation of specific plants. Graphical abstract.
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Affiliation(s)
- Hesham M Abdulla
- Botany Dept., Faculty of Science, Suez Canal University, P.O. Box 41522, Ismailia, Egypt.
| | - Sahar A El-Shatoury
- Botany Dept., Faculty of Science, Suez Canal University, P.O. Box 41522, Ismailia, Egypt
| | - Abeer A El-Shahawy
- Civil Engineering Dept, Faculty of Engineering, Suez Canal University, P.O. Box 41522, Ismailia, Egypt
| | - Safaa A Ghorab
- Forestry and Timber Trees Dept., Hort. Res. Institute, Agric. Research Center, Ismailia, Egypt
| | - Mahmoud Nasr
- Department of Sanitary Engineering, Faculty of Engineering, Alexandria University, P.O. Box 21544, Alexandria, Egypt
| | - Martha E Trujillo
- Department of Microbiology and Genetics, Edificio Departamental, University of Salamanca, Salamanca, Spain
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Adiguzel G, Faiz O, Sisecioglu M, Sari B, Baltaci O, Akbulut S, Genc B, Adiguzel A. A novel endo-β-1,4-xylanase from Pediococcus acidilactici GC25; purification, characterization and application in clarification of fruit juices. Int J Biol Macromol 2019; 129:571-578. [DOI: 10.1016/j.ijbiomac.2019.02.054] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Revised: 01/11/2019] [Accepted: 02/08/2019] [Indexed: 11/28/2022]
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15
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Chen Z, Zaky AA, Liu Y, Chen Y, Liu L, Li S, Jia Y. Purification and characterization of a new xylanase with excellent stability from Aspergillus flavus and its application in hydrolyzing pretreated corncobs. Protein Expr Purif 2019; 154:91-97. [DOI: 10.1016/j.pep.2018.10.006] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Revised: 09/01/2018] [Accepted: 10/10/2018] [Indexed: 12/31/2022]
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Bibi Z, Nawaz MA, Irum-Us-Salam, Waqas M, Aman A, Qader SAU. Significance of metal ions, solvents and surfactants to improve the xylan degrading behavior of β-1,4-D-xylanohydrolase from Geobacillus stearothermophilus KIBGE-IB29. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2019. [DOI: 10.1016/j.bcab.2018.11.028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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17
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Sanjivkumar M, Silambarasan T, Balagurunathan R, Immanuel G. Biosynthesis, molecular modeling and statistical optimization of xylanase from a mangrove associated actinobacterium Streptomyces variabilis (MAB3) using Box-Behnken design with its bioconversion efficacy. Int J Biol Macromol 2018; 118:195-208. [PMID: 29909037 DOI: 10.1016/j.ijbiomac.2018.06.063] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Revised: 05/31/2018] [Accepted: 06/12/2018] [Indexed: 11/16/2022]
Abstract
The present study was undertaken to evaluate the biosynthesis, molecular modeling and statistical optimization of xylanase production through Box-Behnken design by a mangrove associated actinobacterium Streptomyces variabilis (MAB3). Initially, the production of xylanase by the selected strain was carried through submerged fermentation using birchwood xylan as substrate. Further the xylanase production was statistically optimized through Box-Behnken design. It showed 5.30 fold increase of xylanase production by the isolate compared to 'one factor at a time approach' in the presence of the basal medium containing birchwood xylan (2.0% w/v) at pH 8.2, temperature 46.5 °C, inoculum size of 2% for 68 h. The analysis of variance (ANOVA) revealed high coefficient of determination (R2 = 0.9490) for the respective responses at significant level (P < 0.0001). The xylanase was purified by different purification steps and it resulted 5.30 fold increase with the yield of 21.27% at the final step using sephadex G-75 chromatography. The molecular weight of the purified xylanase was observed as 50 kDa on 10% SDS-PAGE. The homology 3D structure of the purified xylanase protein was predicted and this protein encodes with 420 amino acid residues. The maximum activity of purified xylanase was observed at pH 8, temperature 40 °C and the production medium supplemented with 1 mM Ca2+ metal ion, 2.0% xylan and 1.5% NaCl. The kinetic parameters of the purified xylanase expressed the Km and Vmax values of 5.23 mg/ml and 152.07 μg/min/mg, respectively. Finally, the xylanolytic hydrolysis of pretreated agro-residues, especially the rice straw substituted medium yielded maximum (46.28 mg/g) level of reducing sugar and saccharification (63.18%), followed by bioethanol production (3.92 g/l) at 72 h of incubation. Based on the results, it could be confirmed that the selected isolate is a potent strain for xylanase production and also it can able to convert the pretreated agro-residues into economically important byproduct like bioethanol.
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Affiliation(s)
- Muthusamy Sanjivkumar
- MNP laboratory, Centre for Marine Science and Technology, Manonmaniam Sundaranar University, Rajakamangalam 629502, India
| | | | | | - Grasian Immanuel
- MNP laboratory, Centre for Marine Science and Technology, Manonmaniam Sundaranar University, Rajakamangalam 629502, India.
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Trincone A. Update on Marine Carbohydrate Hydrolyzing Enzymes: Biotechnological Applications. Molecules 2018; 23:E901. [PMID: 29652849 PMCID: PMC6017418 DOI: 10.3390/molecules23040901] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Revised: 04/05/2018] [Accepted: 04/10/2018] [Indexed: 12/20/2022] Open
Abstract
After generating much interest in the past as an aid in solving structural problems for complex molecules such as polysaccharides, carbohydrate-hydrolyzing enzymes of marine origin still appear as interesting biocatalysts for a range of useful applications in strong interdisciplinary fields such as green chemistry and similar domains. The multifaceted fields in which these enzymes are of interest and the scarce number of original articles in literature prompted us to provide the specialized analysis here reported. General considerations from modern (2016-2017 interval time) review articles are at start of this manuscript; then it is subsequently organized in sections according to particular biopolymers and original research articles are discussed. Literature sources like the Science Direct database with an optimized W/in search, and the Espacenet patent database were used.
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Affiliation(s)
- Antonio Trincone
- Istituto di Chimica Biomolecolare, Consiglio Nazionale delle Ricerche, Via Campi Flegrei, 34, 80078 Pozzuoli, Naples, Italy.
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Streptomyces spp. in the biocatalysis toolbox. Appl Microbiol Biotechnol 2018; 102:3513-3536. [PMID: 29502181 DOI: 10.1007/s00253-018-8884-x] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Revised: 02/17/2018] [Accepted: 02/19/2018] [Indexed: 02/07/2023]
Abstract
About 20,100 research publications dated 2000-2017 were recovered searching the PubMed and Web of Science databases for Streptomyces, which are the richest known source of bioactive molecules. However, these bacteria with versatile metabolism are powerful suppliers of biocatalytic tools (enzymes) for advanced biotechnological applications such as green chemical transformations and biopharmaceutical and biofuel production. The recent technological advances, especially in DNA sequencing coupled with computational tools for protein functional and structural prediction, and the improved access to microbial diversity enabled the easier access to enzymes and the ability to engineer them to suit a wider range of biotechnological processes. The major driver behind a dramatic increase in the utilization of biocatalysis is sustainable development and the shift toward bioeconomy that will, in accordance to the UN policy agenda "Bioeconomy to 2030," become a global effort in the near future. Streptomyces spp. already play a significant role among industrial microorganisms. The intention of this minireview is to highlight the presence of Streptomyces in the toolbox of biocatalysis and to give an overview of the most important advances in novel biocatalyst discovery and applications. Judging by the steady increase in a number of recent references (228 for the 2000-2017 period), it is clear that biocatalysts from Streptomyces spp. hold promises in terms of valuable properties and applicative industrial potential.
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