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Potential application of ultra-high pressure homogenization in the physico-chemical stabilization of tiger nuts' milk beverage. INNOV FOOD SCI EMERG 2017. [DOI: 10.1016/j.ifset.2016.06.023] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Masran R, Zanirun Z, Bahrin EK, Ibrahim MF, Lai Yee P, Abd-Aziz S. Harnessing the potential of ligninolytic enzymes for lignocellulosic biomass pretreatment. Appl Microbiol Biotechnol 2016; 100:5231-46. [DOI: 10.1007/s00253-016-7545-1] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2016] [Revised: 04/07/2016] [Accepted: 04/12/2016] [Indexed: 01/15/2023]
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Yu W, Liu W, Huang H, Zheng F, Wang X, Wu Y, Li K, Xie X, Jin Y. Application of a novel alkali-tolerant thermostable DyP-type peroxidase from Saccharomonospora viridis DSM 43017 in biobleaching of eucalyptus kraft pulp. PLoS One 2014; 9:e110319. [PMID: 25333297 PMCID: PMC4204856 DOI: 10.1371/journal.pone.0110319] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2014] [Accepted: 09/12/2014] [Indexed: 11/19/2022] Open
Abstract
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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Affiliation(s)
- Wangning Yu
- College of Biological Sciences and Technology, Beijing Forestry University, Beijing, PR China
| | - Weina Liu
- College of Biological Sciences and Technology, Beijing Forestry University, Beijing, PR China
| | - Huoqing Huang
- Feed Research Institute Chinese Academy of Agricultural Sciences, Beijing, PR China
| | - Fei Zheng
- College of Biological Sciences and Technology, Beijing Forestry University, Beijing, PR China
| | - Xiaoyu Wang
- College of Biological Sciences and Technology, Beijing Forestry University, Beijing, PR China
| | - Yuying Wu
- College of Materials Science and Technology, Beijing Forestry University, Beijing, PR China
| | - Kangjia Li
- College of Biological Sciences and Technology, Beijing Forestry University, Beijing, PR China
| | - Xiangming Xie
- College of Biological Sciences and Technology, Beijing Forestry University, Beijing, PR China
| | - Yi Jin
- College of Biological Sciences and Technology, Beijing Forestry University, Beijing, PR China
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Afrida S, Tamai Y, Watanabe T, Osaki M. Biobleaching of Acacia kraft pulp with extracellular enzymes secreted by Irpex lacteus KB-1.1 and Lentinus tigrinus LP-7 using low-cost media. World J Microbiol Biotechnol 2014; 30:2263-71. [PMID: 24699808 DOI: 10.1007/s11274-014-1647-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2013] [Accepted: 03/26/2014] [Indexed: 10/25/2022]
Abstract
The white-rot fungi Irpex lacteus KB-1.1 and Lentinus tigrinus LP-7 have been shown in previous studies to have high biobleaching activity in vivo. The aim of this study was to investigate the activities and stabilities of extracellular enzymes, prepared from I. lacteus and L. tigrinus culture grown in three types of economical media of agricultural and forestry wastes, for biobleaching of Acacia oxygen-delignified kraft pulp using kappa number reduction as an indicator of delignification. After 3 days of incubation, the extracellular enzymes preparations from I. lacteus and L. tigrinus cultures in media of Acacia mangium wood powder supplemented with rice bran and addition 1 % glucose (WRBG), resulted in significant decrease of 4.4 and 6.7 %, respectively. A slightly higher kappa number reduction (7.4 %) was achieved with the combine extracellular enzymes from I. lacteus and L. tigrinus. One of the strategies for reducing the cost of enzyme production for treatment processes in the pulp and paper industry is the utilization of agricultural and forestry waste. Thus, WRBG has potential as a culture medium for producing stable lignolytic enzymes simply and economically.
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Affiliation(s)
- Sitompul Afrida
- Laboratory of Plant Nutrition, Graduate School of Agriculture, Hokkaido University, N9W9, Kita-ku, Sapporo, 060-8589, Japan
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Screening of white rot fungi for biobleaching of Acacia oxygen-delignified kraft pulp. World J Microbiol Biotechnol 2008. [DOI: 10.1007/s11274-008-9932-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Feijoo G, Moreira MT, Álvarez P, Lú-Chau TA, Lema JM. Evaluation of the enzyme manganese peroxidase in an industrial sequence for the lignin oxidation and bleaching of eucalyptus kraft pulp. J Appl Polym Sci 2008. [DOI: 10.1002/app.28084] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Rajan A, Senan RC, Pavithran C, Abraham TE. Biosoftening of coir fiber using selected microorganisms. Bioprocess Biosyst Eng 2005; 28:165-73. [PMID: 16220267 DOI: 10.1007/s00449-005-0023-2] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2005] [Accepted: 09/09/2005] [Indexed: 10/25/2022]
Abstract
Coir fiber belongs to the group of hard structural fibers obtained from coconut husk. As lignin is the main constituent of coir responsible for its stiffness, microbes that selectively remove lignin without loss of appreciable amounts of cellulose are extremely attractive in biosoftening. Five isolated strains were compared with known strains of bacteria and fungi. The raw fiber treated with Pseudomonas putida and Phanerocheate chrysosporium produced better softened fiber at 30+/-2 degrees C and neutral pH. FeSO4 and humic acid were found to be the best inducers for P. chrysosporium and P. putida, respectively, while sucrose and dextrose were the best C-sources for both. Biosoftening of unretted coir fibers was more advantageous than the retted fibers. Unlike the weak chemically softened fiber, microbial treatment produced soft, whiter fibers having better tensile strength and elongation (44.6-44.8%) properties. Scanning electron microscopy photos showed the mycelia penetrating the pores of the fiber, removing the tylose plug and degrading lignin.
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Affiliation(s)
- Akhila Rajan
- Bioactive Polymer Engineering Section, Polymer Division, Regional Research Laboratory (CSIR), Trivandrum, 695 019 Kerala, India
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Konno M, Ooishi M, Inoue Y. Role of manganese in low-pH-induced root hair formation in Lactuca sativa cv. Grand Rapids seedlings. JOURNAL OF PLANT RESEARCH 2003; 116:301-7. [PMID: 12750946 DOI: 10.1007/s10265-003-0100-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2002] [Accepted: 03/14/2003] [Indexed: 05/24/2023]
Abstract
Root hair formation is induced by low pH in lettuce ( Lactuca sativa L. cv. Grand Rapids) seedlings cultured in mineral medium. The role of mineral concentrations in this phenomenon was investigated, especially for manganese. When lettuce seedlings were cultured in media that were deficient in calcium (Ca), manganese (Mn), boron (B) or molybdenum (Mo), morphological changes were induced in roots. Deficiency of other nutrients had little effect on root hair formation. Ca or B deficiency inhibited the growth of the main root and the formation of root hairs, regardless of pH. Mn or Mo deficiency increased root hair formation at pH 6 and suppressed main root growth slightly. In contrast, increasing the Mn concentration suppressed low-pH-induced root hair formation. The Mn content of roots grown at pH 4 was only about 15% of that at pH 6. In contrast, the Mo content of roots grown at low pH was about six times that of roots grown at neutral pH. These results suggest that root hair formation induced by low pH is at least partly mediated by decreased Mn uptake in root cells.
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Affiliation(s)
- Masae Konno
- Department of Applied Biological Science, Faculty of Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
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Tuncer M, Ball AS. Purification and partial characterization of alpha-L-arabinofuranosidase produced by Thermomonospora fusca. Folia Microbiol (Praha) 2003; 48:168-72. [PMID: 12800498 DOI: 10.1007/bf02930950] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Thermomonospora fusca produced a relatively high level of alpha-L-arabinofuranosidase when growing on oat spelt xylan as the main carbon and energy source. The enzyme exhibited maximum relative activity (0.136 U/g protein) at pH 9.0 with 54 and 55% activity remaining at pH of 4.5 and 11.0, respectively. The apparent Km value for the crude alpha-L-arabinofuranosidase preparation was 180 mumol/L 4-nitrophenyl alpha-L-arabinofuranoside; the upsilon lim value was the release of 40 mumol/L 4-nitrophenol per min. Enzyme activity was eluted as a single peak (HPLC gel filtration chromatography) corresponding to molar mass of approximately 92 kDa. Native electrophoresis of crude cell lysate confirmed the presence of a single active intracellular alpha-L-arabinofuranosidase component. SDS-PAGE of this enzyme, developed as zymogram, did not demonstrate any activity; denaturing gel was stained and a protein band of relative molar mass of 46 kDa was revealed. Isoelectric focusing of a purified alpha-L-arabinofuranosidase yielded a single protein band for the corresponding activity zone with pI 7.9. The enzyme was purified approximately 21-fold the mean overall yield was about 16%.
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Affiliation(s)
- M Tuncer
- Biyoloji Bölümü, Fen-Edebiyat Fakültesi, Mersin Universitesi, 33342 Mersin, Turkey.
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Hofrichter M, Lundell T, Hatakka A. Conversion of milled pine wood by manganese peroxidase from Phlebia radiata. Appl Environ Microbiol 2001; 67:4588-93. [PMID: 11571160 PMCID: PMC93207 DOI: 10.1128/aem.67.10.4588-4593.2001] [Citation(s) in RCA: 87] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2001] [Accepted: 07/09/2001] [Indexed: 11/20/2022] Open
Abstract
Purified manganese peroxidase (MnP) from the white-rot basidiomycete Phlebia radiata was found to convert in vitro milled pine wood (MPW) suspended in an aqueous reaction solution containing Tween 20, Mn(2+), Mn-chelating organic acid (malonate), and a hydrogen peroxide-generating system (glucose-glucose oxidase). The enzymatic attack resulted in the polymerization of lower-molecular-mass, soluble wood components and in the partial depolymerization of the insoluble bulk of pine wood, as demonstrated by high-performance size exclusion chromatography (HPSEC). The surfactant Tween 80 containing unsaturated fatty acid residues promoted the disintegration of bulk MPW. HPSEC showed that the depolymerization yielded preferentially lignocellulose fragments with a predominant molecular mass of ca. 0.5 kDa. MnP from P. radiata (MnP3) turned out to be a stable enzyme remaining active for 2 days even at 37 degrees C with vigorous stirring, and 65 and 35% of the activity applied was retained in Tween 20 and Tween 80 reaction mixtures, respectively. In the course of reactions, major part of the Mn-chelator malonate was decomposed (85 to 87%), resulting in an increase of pH from 4.4 to >6.5. An aromatic nonphenolic lignin structure (beta-O-4 dimer), which is normally not attacked by MnP, was oxidizible in the presence of pine wood meal. This finding indicates that certain wood components may promote the degradative activities of MnP in a way similar to that promoted by Tween 80, unsaturated fatty acids, or thiols.
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Affiliation(s)
- M Hofrichter
- Division of Microbiology, Department of Applied Chemistry and Microbiology, University of Helsinki, FIN-00014 Helsinki, Finland.
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Tzedakis T, Benzada Y, Comtat M. Kinetic Study of Binuclear Manganese−Tris(2-methyl pyridyl)amine Complex Used as a Catalyst for Wood Pulp Bleaching. Ind Eng Chem Res 2001. [DOI: 10.1021/ie0100840] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- T. Tzedakis
- Laboratoire de Génie Chimique, UMR CNRS 5503, Université Paul Sabatier, 118, Route de Narbonne, 31062 Toulouse, France
| | - Y. Benzada
- Laboratoire de Génie Chimique, UMR CNRS 5503, Université Paul Sabatier, 118, Route de Narbonne, 31062 Toulouse, France
| | - M. Comtat
- Laboratoire de Génie Chimique, UMR CNRS 5503, Université Paul Sabatier, 118, Route de Narbonne, 31062 Toulouse, France
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Dunwell JM, Khuri S, Gane PJ. Microbial relatives of the seed storage proteins of higher plants: conservation of structure and diversification of function during evolution of the cupin superfamily. Microbiol Mol Biol Rev 2000; 64:153-79. [PMID: 10704478 PMCID: PMC98990 DOI: 10.1128/mmbr.64.1.153-179.2000] [Citation(s) in RCA: 218] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
This review summarizes the recent discovery of the cupin superfamily (from the Latin term "cupa," a small barrel) of functionally diverse proteins that initially were limited to several higher plant proteins such as seed storage proteins, germin (an oxalate oxidase), germin-like proteins, and auxin-binding protein. Knowledge of the three-dimensional structure of two vicilins, seed proteins with a characteristic beta-barrel core, led to the identification of a small number of conserved residues and thence to the discovery of several microbial proteins which share these key amino acids. In particular, there is a highly conserved pattern of two histidine-containing motifs with a varied intermotif spacing. This cupin signature is found as a central component of many microbial proteins including certain types of phosphomannose isomerase, polyketide synthase, epimerase, and dioxygenase. In addition, the signature has been identified within the N-terminal effector domain in a subgroup of bacterial AraC transcription factors. As well as these single-domain cupins, this survey has identified other classes of two-domain bicupins including bacterial gentisate 1, 2-dioxygenases and 1-hydroxy-2-naphthoate dioxygenases, fungal oxalate decarboxylases, and legume sucrose-binding proteins. Cupin evolution is discussed from the perspective of the structure-function relationships, using data from the genomes of several prokaryotes, especially Bacillus subtilis. Many of these functions involve aspects of sugar metabolism and cell wall synthesis and are concerned with responses to abiotic stress such as heat, desiccation, or starvation. Particular emphasis is also given to the oxalate-degrading enzymes from microbes, their biological significance, and their value in a range of medical and other applications.
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Affiliation(s)
- J M Dunwell
- School of Plant Sciences, The University of Reading, Reading, United Kingdom.
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Tuncer M, Ball AS, Rob A, Wilson MT. Optimization of extracellular lignocellulolytic enzyme production by a thermophilic actinomycete Thermomonospora fusca BD25. Enzyme Microb Technol 1999. [DOI: 10.1016/s0141-0229(99)00012-5] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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