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Galetović A, Peña G, Fernández N, Urrutia M, Flores N, Gómez-Silva B, Di Ruggiero J, Shene C, Bustamante M. Cellulose Synthase in Atacama Cyanobacteria and Bioethanol Production from Their Exopolysaccharides. Microorganisms 2023; 11:2668. [PMID: 38004680 PMCID: PMC10673042 DOI: 10.3390/microorganisms11112668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 10/05/2023] [Accepted: 10/11/2023] [Indexed: 11/26/2023] Open
Abstract
Cyanobacteria produce exopolysaccharides (EPSs) as an adaptative mechanism against ultraviolet radiation and desiccation. Cellulose is present in the extracellular polymeric substance in some cyanobacteria genera and it has been proposed as a raw material for biofuel production. The goal of this work was to evaluate the cellulose presence in EPS of Atacama cyanobacteria strains and its use as an alternative and innovative biological source to produce bioethanol. The presence of cellulose was evaluated using techniques of molecular biology, bioinformatics, and electronic microscopy. The conserved motif D,D,D,35QXXRW, characteristic of processive β-glycosyltransferase in all cellulose-producing organisms, was identified in the genome of the LLA-10 strain. This is evidence that cellulose synthase in the LLA-10 strain is a functional enzyme. EPS from Atacama cyanobacteria was hydrolyzed by β-glucosidases (cellobiase and cellulase) and the released glucose was yeast-fermented to ethanol. Ethanol production reached 172.69 ± 0.02 mg ethanol/g EPS after 48 h of incubation. These results are the first step in the evaluation of EPS produced by native cyanobacteria isolated from northern Chile for future biotechnological applications such as the production of bioethanol.
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Affiliation(s)
- Alexandra Galetović
- Laboratorio de Bioquímica, Departamento Biomédico, Facultad de Ciencias de la Salud, Universidad de Antofagasta, Av. Universidad de Antofagasta 02800, Campus Coloso, Antofagasta 1271155, Chile
- Laboratorio de Genómica Microbiana, Departamento Biomédico, Facultad de Ciencias de la Salud, Universidad de Antofagasta, Av. Universidad de Antofagasta 02800, Campus Coloso, Antofagasta 1271155, Chile
- Centre for Biotechnology and Bioengineering, CeBiB, Beauchef 851, North Building-7th Floor, Santiago 8370456, Chile
- Millennium Institute Center for Genome Regulation, MI-CRG, Av. Libertador Bernardo O'Higgins No. 340, Santiago 8331150, Chile
| | - Gabriel Peña
- Laboratorio de Bioquímica, Departamento Biomédico, Facultad de Ciencias de la Salud, Universidad de Antofagasta, Av. Universidad de Antofagasta 02800, Campus Coloso, Antofagasta 1271155, Chile
- Laboratorio de Genómica Microbiana, Departamento Biomédico, Facultad de Ciencias de la Salud, Universidad de Antofagasta, Av. Universidad de Antofagasta 02800, Campus Coloso, Antofagasta 1271155, Chile
- Centre for Biotechnology and Bioengineering, CeBiB, Beauchef 851, North Building-7th Floor, Santiago 8370456, Chile
- Millennium Institute Center for Genome Regulation, MI-CRG, Av. Libertador Bernardo O'Higgins No. 340, Santiago 8331150, Chile
| | - Nicole Fernández
- Laboratorio de Bioquímica, Departamento Biomédico, Facultad de Ciencias de la Salud, Universidad de Antofagasta, Av. Universidad de Antofagasta 02800, Campus Coloso, Antofagasta 1271155, Chile
| | - Milton Urrutia
- Ciencias Médicas, Facultad de Medicina y Odontología, Universidad de Antofagasta, Av. Argentina 2000, Antofagasta 1270001, Chile
| | - Nataly Flores
- Centre for Biotechnology and Bioengineering, CeBiB, Beauchef 851, North Building-7th Floor, Santiago 8370456, Chile
| | - Benito Gómez-Silva
- Laboratorio de Bioquímica, Departamento Biomédico, Facultad de Ciencias de la Salud, Universidad de Antofagasta, Av. Universidad de Antofagasta 02800, Campus Coloso, Antofagasta 1271155, Chile
- Centre for Biotechnology and Bioengineering, CeBiB, Beauchef 851, North Building-7th Floor, Santiago 8370456, Chile
| | - Jocelyne Di Ruggiero
- Department of Biology and Department of Earth and Planetary Sciences, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Carolina Shene
- Department of Chemical Engineering and Center of Food Biotechnology and Bioseparations, BIOREN, Universidad de La Frontera, Casilla 54-D, Temuco 4811230, Chile
| | - Mariela Bustamante
- Scientific and Technological Bioresource Nucleus, BIOREN, Universidad de La Frontera, Casilla 54-D, Temuco 5468901, Chile
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