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Pehlivan AD, Bozdemir MT, Ozbas ZY. Effects of different carbon and nitrogen sources on liamocin production kinetics of Aureobasidium pullulans NBRC 100716 strain. Arch Microbiol 2024; 206:353. [PMID: 39014223 DOI: 10.1007/s00203-024-04065-6] [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] [Received: 04/26/2024] [Revised: 06/10/2024] [Accepted: 06/21/2024] [Indexed: 07/18/2024]
Abstract
Liamocins are molecules with a polyol lipid structure produced by rare strains of Aureobasidium pullulans. In recent years, liamocins have attracted attention due to their antibacterial, anticancer and surface-active properties, and promising potential applications have been identified in the food, agriculture, medical and pharmaceutical industries. This study is the first to investigate the effects of different carbon and nitrogen sources on the growth and liamocin production kinetics of A. pullulans NBRC 100716 strain. This strain was selected among six different A. pullulans strains whose liamocin productions were tested by us for the first time. In fermentations carried out in shaking water baths, the carbon source that most supported the liamocin production of this strain was fructose, and the nitrogen source was peptone-yeast extract combination. In the medium containing fructose and the peptone-yeast extract mixture, A. pullulans NBRC 100716 produced 4.26 g liamocin L-1. The specific liamocin production rate (qp) of the strain in this medium was 0.0090 g liamocin/g mo.h. This study is also the first to produce liamocin with a fructophilic A. pullulans strain. Present findings in this research also demonstrated the excellent biosurfactant capacity of the liamocin produced by this strain. The obtained liamocin reduced the water surface tension to a degree that can compete with synthetic surfactants. Furthermore, this is the first report to reveal that the fatty acid profile of liamocin obtained from A. pullulans NBRC 100716 contains an appreciable amount of unsaturated fatty acids and is similar to the composition of vegetable oil.
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Affiliation(s)
- Aslı Deniz Pehlivan
- Faculty of Engineering, Department of Food Engineering, Hacettepe University, Beytepe, 06800, Ankara, Turkey
| | - M Tijen Bozdemir
- Faculty of Engineering, Department of Chemical Engineering, Hacettepe University, Beytepe, 06800, Ankara, Turkey
| | - Z Yesim Ozbas
- Faculty of Engineering, Department of Food Engineering, Hacettepe University, Beytepe, 06800, Ankara, Turkey.
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Wang QQ, Lin J, Zhou QZ, Peng J, Zhang Q, Wang JH. Hyper-Production of Pullulan by a Novel Fungus of Aureobasidium melanogenum ZH27 through Batch Fermentation. Int J Mol Sci 2023; 25:319. [PMID: 38203490 PMCID: PMC10779298 DOI: 10.3390/ijms25010319] [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: 09/13/2023] [Revised: 11/09/2023] [Accepted: 12/21/2023] [Indexed: 01/12/2024] Open
Abstract
Pullulan, which is a microbial exopolysaccharide, has found widespread applications in foods, biomedicines, and cosmetics. Despite its versatility, most wild-type strains tend to yield low levels of pullulan production, and their mutants present genetic instability, achieving a limited increase in pullulan production. Therefore, mining new wild strains with robust pullulan-producing abilities remains an urgent concern. In this study, we found a novel strain, namely, Aureobasidium melanogenum ZH27, that had a remarkable pullulan-producing capacity and optimized its cultivation conditions using the one-factor-at-a-time method. To elucidate the reasons that drove the hyper-production of pullulan, we scrutinized changes in cell morphology and gene expressions. The results reveal that strain ZH27 achieved 115.4 ± 1.82 g/L pullulan with a productivity of 0.87 g/L/h during batch fermentation within 132 h under the optimized condition (OC). This pullulan titer increased by 105% compared with the initial condition (IC). Intriguingly, under the OC, swollen cells featuring 1-2 large vacuoles predominated during a rapid pullulan accumulation, while these swollen cells with one large vacuole and several smaller ones were prevalent under the IC. Moreover, the expressions of genes associated with pullulan accumulation and by-product synthesis were almost all upregulated. These findings suggest that swollen cells and large vacuoles may play pivotal roles in the high level of pullulan production, and the accumulation of by-products also potentially contributes to pullulan synthesis. This study provides a novel and promising candidate for industrial pullulan production.
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Affiliation(s)
- Qin-Qing Wang
- Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, School of Marine Sciences, Sun Yat-Sen University, Zhuhai 519082, China; (J.L.); (Q.-Z.Z.); (J.P.); (Q.Z.)
- Guangdong Engineering Laboratory of Biomass High-Value Utilization, Institute of Biological and Medical Engineering, Guangdong Academy of Sciences, Guangzhou 510316, China
| | - Jia Lin
- Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, School of Marine Sciences, Sun Yat-Sen University, Zhuhai 519082, China; (J.L.); (Q.-Z.Z.); (J.P.); (Q.Z.)
| | - Qian-Zhi Zhou
- Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, School of Marine Sciences, Sun Yat-Sen University, Zhuhai 519082, China; (J.L.); (Q.-Z.Z.); (J.P.); (Q.Z.)
| | - Juan Peng
- Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, School of Marine Sciences, Sun Yat-Sen University, Zhuhai 519082, China; (J.L.); (Q.-Z.Z.); (J.P.); (Q.Z.)
| | - Qi Zhang
- Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, School of Marine Sciences, Sun Yat-Sen University, Zhuhai 519082, China; (J.L.); (Q.-Z.Z.); (J.P.); (Q.Z.)
| | - Jiang-Hai Wang
- Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, School of Marine Sciences, Sun Yat-Sen University, Zhuhai 519082, China; (J.L.); (Q.-Z.Z.); (J.P.); (Q.Z.)
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Production of liamocins by Aureobasidium spp. with potential applications. Biochem Eng J 2022. [DOI: 10.1016/j.bej.2022.108687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Ultra-high molecular weight pullulan-based material with high deformability and shape-memory properties. Carbohydr Polym 2022; 295:119836. [DOI: 10.1016/j.carbpol.2022.119836] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Revised: 06/21/2022] [Accepted: 07/04/2022] [Indexed: 11/19/2022]
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de Andrade Silva T, Keijok WJ, Guimarães MCC, Cassini STA, de Oliveira JP. Impact of immobilization strategies on the activity and recyclability of lipases in nanomagnetic supports. Sci Rep 2022; 12:6815. [PMID: 35474328 PMCID: PMC9042828 DOI: 10.1038/s41598-022-10721-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Accepted: 04/12/2022] [Indexed: 01/19/2023] Open
Abstract
The use of enzymes immobilized on nanomagnetic supports has produced surprising results in catalysis, mainly due to the increase in surface area and the potential for recovery and reuse. However, the meticulous control of the process and difficulties in reproducibility have made industrial-scale applications unfeasible. Furthermore, the role of conjugation strategies in the catalytic activity and recycling of catalysts is unclear. Therefore, the objective of this study was to compare the conjugation of enzymes on nanomagnetic supports through physical adsorption (naked) or covalent bonding with mercaptopropyltrimethoxysilane (MPTS) and aminopropyltriethoxysilane (APTS) ligands. The free lipase obtained from Rhizomucor miehei was used as a model enzyme. Total protein and enzyme activity were determined using spectrophotometry (UV-Vis) and the p-nitrophenyl palmitate (p-NPP) hydrolysis method. The results indicated that a more significant enzyme surface loading does not always mean better immobilization success. The physical adsorption binding strategy had higher surface loading and low catalytic activity. On the other hand, covalent coupling with free NH2 had an excellent catalytic activity with very low surface loading. Finally, we show that recyclability can be improved with conjugation mediated by disulfide bonds. The findings presented here are essential for developing nanoconjugates with high enzymatic activity, which can guarantee the success of several industrial applications.
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Affiliation(s)
- Thais de Andrade Silva
- Federal University of Espírito Santo, Av Marechal Campos 1468, Vitória, ES, 29040-090, Brazil
| | | | | | | | - Jairo Pinto de Oliveira
- Federal University of Espírito Santo, Av Marechal Campos 1468, Vitória, ES, 29040-090, Brazil.
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Li T, Yang W, Xu X, Zhang Y, Chen J, Zou X. Coproduction of polymalic acid and liamocins from two waste by-products from the xylitol and gluconate industries by Aureobasidium pullulans. Bioprocess Biosyst Eng 2021; 44:1965-1974. [PMID: 33963907 DOI: 10.1007/s00449-021-02578-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Accepted: 04/27/2021] [Indexed: 10/21/2022]
Abstract
The coproduction of polymalic acid (PMA) and liamocins, two important metabolites secreted by Aureobasidium pullulans, from two waste by-products from the xylitol and gluconate industries was investigated in shake flasks and fermentors, confirming that waste xylose mother liquor (WXML) could be utilized as an economical feedstock without any pretreatment. Gluconate could strengthen carbon flux and NADPH supply for the synergetic biosynthesis of PMA and liamocins. High PMA and liamocin titers of 82.9 ± 2.1 and 28.3 ± 2.7 g/L, respectively, were obtained from the coupled WXML and waste gluconate mother liquor (WGML) in batch fermentation, with yields of 0.84 and 0.25 g/g, respectively. These results are comparable to those obtained from renewable feedstocks. Economic assessment of the process revealed that PMA and liamocins could be coproduced from two by-products at costs of $1.48/kg or $0.67/kg (with liamocins credit), offering an economic and sustainable process for the application of waste by-products.
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Affiliation(s)
- Tianfu Li
- College of Pharmaceutical Sciences, Southwest University, 2 Tian Sheng Road, Beibei, Chongqing, 400715, People's Republic of China
| | - Wenwen Yang
- College of Pharmaceutical Sciences, Southwest University, 2 Tian Sheng Road, Beibei, Chongqing, 400715, People's Republic of China
| | - Xingran Xu
- College of Pharmaceutical Sciences, Southwest University, 2 Tian Sheng Road, Beibei, Chongqing, 400715, People's Republic of China
| | - Yan Zhang
- Auhui Sealong Biotechnology Co., Ltd, 6 Jinchong Road, Bengbu, 233316, Anhui Province, People's Republic of China
| | - Jie Chen
- School of Environmental Ecology and Biological Engineering, Wuhan Institute of Technology, Guanggu 1st road, Wuhan, Hubei Province, 430205, People's Republic of China.
| | - Xiang Zou
- College of Pharmaceutical Sciences, Southwest University, 2 Tian Sheng Road, Beibei, Chongqing, 400715, People's Republic of China.
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