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Ji J, Escobar M, Cui S, Zhang W, Bao C, Su X, Wang G, Zhang S, Chen H, Chen G. Isolation and Characterization of a Low-Temperature, Cellulose-Degrading Microbial Consortium from Northeastern China. Microorganisms 2024; 12:1059. [PMID: 38930441 PMCID: PMC11205951 DOI: 10.3390/microorganisms12061059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2024] [Revised: 05/17/2024] [Accepted: 05/22/2024] [Indexed: 06/28/2024] Open
Abstract
The lack of efficient ways to dispose of lignocellulosic agricultural residues is a serious environmental issue. Low temperatures greatly impact the ability of organisms to degrade these wastes and convert them into nutrients. Here, we report the isolation and genomic characterization of a microbial consortium capable of degrading corn straw at low temperatures. The microorganisms isolated showed fast cellulose-degrading capabilities, as confirmed by scanning electron microscopy and the weight loss in corn straw. Bacteria in the consortium behaved as three diverse and functionally distinct populations, while fungi behaved as a single population in both diversity and functions overtime. The bacterial genus Pseudomonas and the fungal genus Thermoascus had prominent roles in the microbial consortium, showing significant lignocellulose waste-degrading functions. Bacteria and fungi present in the consortium contained high relative abundance of genes for membrane components, with amino acid breakdown and carbohydrate degradation being the most important metabolic pathways for bacteria, while fungi contained more genes involved in energy use, carbohydrate degradation, lipid and fatty acid decomposition, and biosynthesis.
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Affiliation(s)
- Jiaoyang Ji
- College of Life Science, Jilin Agricultural University, Changchun 130022, China
- Key Laboratory of Straw Comprehensive Utilization and Black Soil Conservation, Ministry of Education, Jilin Agricultural University, Changchun 130118, China
| | - Maia Escobar
- College of Life Science, Jilin Agricultural University, Changchun 130022, China
- Key Laboratory of Straw Comprehensive Utilization and Black Soil Conservation, Ministry of Education, Jilin Agricultural University, Changchun 130118, China
| | - Shijia Cui
- College of Life Science, Jilin Agricultural University, Changchun 130022, China
- Key Laboratory of Straw Comprehensive Utilization and Black Soil Conservation, Ministry of Education, Jilin Agricultural University, Changchun 130118, China
| | - Wei Zhang
- Jilin Province Hydraulic Research Institute, Changchun 130022, China
| | - Changjie Bao
- College of Life Science, Jilin Agricultural University, Changchun 130022, China
- Key Laboratory of Straw Comprehensive Utilization and Black Soil Conservation, Ministry of Education, Jilin Agricultural University, Changchun 130118, China
| | - Xuhan Su
- College of Life Science, Jilin Agricultural University, Changchun 130022, China
- Key Laboratory of Straw Comprehensive Utilization and Black Soil Conservation, Ministry of Education, Jilin Agricultural University, Changchun 130118, China
| | - Gang Wang
- College of Life Science, Jilin Agricultural University, Changchun 130022, China
- Key Laboratory of Straw Comprehensive Utilization and Black Soil Conservation, Ministry of Education, Jilin Agricultural University, Changchun 130118, China
| | - Sitong Zhang
- College of Life Science, Jilin Agricultural University, Changchun 130022, China
- Key Laboratory of Straw Comprehensive Utilization and Black Soil Conservation, Ministry of Education, Jilin Agricultural University, Changchun 130118, China
| | - Huan Chen
- College of Life Science, Jilin Agricultural University, Changchun 130022, China
- Key Laboratory of Straw Comprehensive Utilization and Black Soil Conservation, Ministry of Education, Jilin Agricultural University, Changchun 130118, China
| | - Guang Chen
- College of Life Science, Jilin Agricultural University, Changchun 130022, China
- Key Laboratory of Straw Comprehensive Utilization and Black Soil Conservation, Ministry of Education, Jilin Agricultural University, Changchun 130118, China
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Akram F, Fatima T, Ibrar R, Shabbir I, Shah FI, Haq IU. Trends in the development and current perspective of thermostable bacterial hemicellulases with their industrial endeavors: A review. Int J Biol Macromol 2024; 265:130993. [PMID: 38508567 DOI: 10.1016/j.ijbiomac.2024.130993] [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: 07/15/2023] [Revised: 03/12/2024] [Accepted: 03/17/2024] [Indexed: 03/22/2024]
Abstract
Hemicellulases are enzymes that hydrolyze hemicelluloses, common polysaccharides in nature. Thermophilic hemicellulases, derived from microbial strains, are extensively studied as natural biofuel sources due to the complex structure of hemicelluloses. Recent research aims to elucidate the catalytic principles, mechanisms and specificity of hemicellulases through investigations into their high-temperature stability and structural features, which have applications in biotechnology and industry. This review article targets to serve as a comprehensive resource, highlighting the significant progress in the field and emphasizing the vital role of thermophilic hemicellulases in eco-friendly catalysis. The primary goal is to improve the reliability of hemicellulase enzymes obtained from thermophilic bacterial strains. Additionally, with their ability to break down lignocellulosic materials, hemicellulases hold immense potential for biofuel production. Despite their potential, the commercial viability is hindered by their high enzyme costs, necessitating the development of efficient bioprocesses involving waste pretreatment with microbial consortia to overcome this challenge.
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Affiliation(s)
- Fatima Akram
- Institute of Industrial Biotechnology, Government College University, Lahore 54000, Pakistan.
| | - Taseer Fatima
- Institute of Industrial Biotechnology, Government College University, Lahore 54000, Pakistan
| | - Ramesha Ibrar
- Institute of Industrial Biotechnology, Government College University, Lahore 54000, Pakistan
| | - Ifrah Shabbir
- Institute of Industrial Biotechnology, Government College University, Lahore 54000, Pakistan
| | | | - Ikram Ul Haq
- Institute of Industrial Biotechnology, Government College University, Lahore 54000, Pakistan; Pakistan Academy of Sciences, Islamabad, Pakistan
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Dauda WP, Abraham P, Glen E, Adetunji CO, Ghazanfar S, Ali S, Al-Zahrani M, Azameti MK, Alao SEL, Zarafi AB, Abraham MP, Musa H. Robust Profiling of Cytochrome P450s (P450ome) in Notable Aspergillus spp. Life (Basel) 2022; 12:life12030451. [PMID: 35330202 PMCID: PMC8955511 DOI: 10.3390/life12030451] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Revised: 03/11/2022] [Accepted: 03/14/2022] [Indexed: 02/03/2023] Open
Abstract
Cytochrome P450s (P450ome) constitute an extended superfamily group of heme-thiolate enzymes identified in all biological domains. P450omes play a critical role in the oxidation of steroids and fatty acids, xenobiotic degradation of hydrophobic compounds, biosynthesis of hormones, and primary and secondary metabolism in organisms. Aspergillus species are among the most economically important fungal organisms in human medicine, industry, and agriculture worldwide. Exploring insight on the genome-wide annotations of cytochrome P450s in Aspergillus species is necessary for their biosynthetic applications. In this present study, we report the identification of 306 cytochrome P450s and their robust profiling in eight notable Aspergillus species (A. carbonarius, A. clavatus, A. flavus, A. fumigatus, A. nidulans, A. niger, A. oryzae, and A. terreus). Based on the evolutionary relationship, the Aspergillus P450s families clustered into 15 clades, with clades V, I, and XIII recording higher percentages (17.3%, 15.00%, and 14.71%, respectively) of Cyp families. Cyps were classified into 120 families 64 clans, and their putative functions were also elucidated. P450s were predicted to be located in 13 subcellular components, but the endoplasm reticulum was the dominant location across the eight Aspergillus species. Cyps genes of Aspergillus species were associated with seven secondary metabolism-related gene clusters. Elucidating the genome-wide annotations of P450s enzymes in Aspergillus species will form vital potential biotechnological tools that could be harnessed for industrial, pharmaceutical, and agricultural use.
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Affiliation(s)
- Wadzani Palnam Dauda
- Crop Science Unit, Department of Agronomy, Federal University Gashua, Gashua P.M.B 1005, Yobe State, Nigeria
- Correspondence:
| | - Peter Abraham
- Department of Horticulture, Federal College of Horticulture, Dadin Kowa P.M.B 108, Gombe State, Nigeria; (P.A.); (M.P.A.)
| | - Elkanah Glen
- Department of Biochemistry, Federal University Lokoja, Lokoja P.M.B 1154, Kogi State, Nigeria;
| | - Charles Oluwaseun Adetunji
- Applied Microbiology, Biotechnology and Nanotechnology Laboratory, Department of Microbiology, Edo University Iyamho, Auchi P.M.B 04, Edo State, Nigeria;
| | - Shakira Ghazanfar
- National Agricultural Research Centre, National Institute of Genomics and Agriculture Biotechnology (NIGAB), Park Road, Islamabad 45500, Pakistan;
| | - Shafaqat Ali
- Department of Environmental Sciences and Engineering, Government College University Faisalabad, Faisalabad 38000, Pakistan;
- Department of Biological Sciences and Technology, China Medical University, Taichung 40402, Taiwan
| | - Majid Al-Zahrani
- Biological Science Department, College of Sciences and Art, King Abdulaziz University, Rabigh 80200, Saudi Arabia;
| | - Mawuli Kwamla Azameti
- Division of Molecular Biology and Biotechnology, Indian Agricultural Research Institute, New Delhi 110012, India;
| | - Sheik Emmanuel Laykay Alao
- Department of Crop Protection, Faculty of Agriculture, Ahmadu Bello University, Zaria 810107, Kaduna State, Nigeria; (S.E.L.A.); (A.B.Z.)
| | - Afiniki Bawa Zarafi
- Department of Crop Protection, Faculty of Agriculture, Ahmadu Bello University, Zaria 810107, Kaduna State, Nigeria; (S.E.L.A.); (A.B.Z.)
| | - Maryam Peter Abraham
- Department of Horticulture, Federal College of Horticulture, Dadin Kowa P.M.B 108, Gombe State, Nigeria; (P.A.); (M.P.A.)
| | - Hannatu Musa
- Department of Botany, Ahmadu Bello University, Zaria 810107, Kaduna State, Nigeria;
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Molecular modification, structural characterization, and biological activity of xylans. Carbohydr Polym 2021; 269:118248. [PMID: 34294285 DOI: 10.1016/j.carbpol.2021.118248] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Revised: 05/21/2021] [Accepted: 05/23/2021] [Indexed: 12/17/2022]
Abstract
The differences in the source and structure of xylans make them have various biological activities. However, due to their inherent structural limitations, the various biological activities of xylans are far lower than those of commercial drugs. Currently, several types of molecular modification methods have been developed to address these limitations, and many derivatives with specific biological activity have been obtained. Further research on structural characteristics, structure-activity relationship and mechanism of action is of great significance for the development of xylan derivatives. Therefore, the major molecular modification methods of xylans are introduced in this paper, and the primary structure and conformation characteristics of xylans and their derivatives are summarized. In addition, the biological activity and structure-activity relationship of the modified xylans are also discussed.
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