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Li S, Tahiri G, Yang J, Mohamed H, Liu Q, Shi W, López-García S, Garre V, Song Y. Role of AMP Deaminase in Mucor circinelloides: Implications for Nitrogen Utilization and Lipid Biosynthesis. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:15680-15691. [PMID: 37822229 DOI: 10.1021/acs.jafc.3c04574] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/13/2023]
Abstract
Lipid accumulation in oleaginous organisms is initiated by AMP deaminase (AMPD) after nitrogen depletion because it mediates the concentration of intracellular adenosine monophosphate (AMP). However, the role of AMPD in lipogenesis in the oleaginous fungus Mucor circinelloides is largely unknown. Therefore, we identified the genes (ampd1 and ampd2) encoding AMPD and investigated the role of AMPD in lipid synthesis in this fungus by overexpressing and deleting ampd genes. Deletion of ampd1 and ampd2 caused 21 and 28% increments in lipid contents under N-limited conditions, respectively. These increases were correlated with the activation of enzymes involved in lipogenesis and the alteration of energy balance. Unexpectedly, overexpression of ampd genes affected nitrogen consumption in both N-limited and N-excess media, which resulted in an increase in cell growth and lipid accumulation compared with the control strain when nitrogen was available. Furthermore, the increased lipid accumulation in the ampd-overexpressing mutants in N-excess media was accompanied by enhanced activities of lipid biosynthetic enzymes. These data suggested that nitrogen metabolism and energy metabolism are affected by AMPD, and overexpression of ampd genes induced lipid accumulation under nitrogen-rich conditions by mimicking the nitrogen limitation response. This highlights an intriguing function of AMPD in M. circinelloides.
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Affiliation(s)
- Shaoqi Li
- Colin Ratledge Center for Microbial Lipids, School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255000, China
| | - Ghizlane Tahiri
- Departmento de Genética y Microbiología, Facultad de Biología, Universidad de Murcia, Murcia 3100, Spain
| | - Junhuan Yang
- Department of Food Science, College of Food Science and Engineering, Lingnan Normal University, Zhanjiang 524048, China
| | - Hassan Mohamed
- Colin Ratledge Center for Microbial Lipids, School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255000, China
- Department of Botany and Microbiology, Faculty of Science, Al-Azhar University, Assiut 71524, Egypt
| | - Qing Liu
- Colin Ratledge Center for Microbial Lipids, School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255000, China
| | - Wenyue Shi
- Colin Ratledge Center for Microbial Lipids, School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255000, China
| | - Sergio López-García
- Departmento de Genética y Microbiología, Facultad de Biología, Universidad de Murcia, Murcia 3100, Spain
| | - Victoriano Garre
- Departmento de Genética y Microbiología, Facultad de Biología, Universidad de Murcia, Murcia 3100, Spain
| | - Yuanda Song
- Colin Ratledge Center for Microbial Lipids, School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255000, China
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Lertsriwong S, Boonvitthya N, Glinwong C. Schwanniomyces etchellsii, acid-thermotolerant yeasts from urban city soil. World J Microbiol Biotechnol 2023; 39:159. [PMID: 37067620 DOI: 10.1007/s11274-023-03602-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Accepted: 04/02/2023] [Indexed: 04/18/2023]
Abstract
Acid-tolerant yeasts are one of the important keys to producing ethanol from acidic substrates, especially from molasses and agricultural waste. In this study, selected cultivars of yeasts isolated from a variety of locations such as botanical gardens in Thailand urban areas, which are often found highly polluted in the air such as carbon dioxide which is a cause of acid rain. There is limited information about how tolerant yeasts, are or their functional properties related to the environment. Yeast species were determined by using the 18S rDNA sequence guide. The level of acid tolerance was evaluated by adding to the culture medium lactic acid (300-900 mM), acetic acid (100-400 mM), and propionic acid (25-100 mM). 18S rDNA analysis has shown a %similarity of the nucleotide sequence higher than 98.65% compared to the database. Schwanniomyces etchellsii strains found in urban city soil were notable for their tolerance of lactic acid up to 100 mM. There are two main types of yeasts in overall acid tolerance: S. etchellsii, which is recognized as an osmotic pressure-resistant species that is highly resistant to fermentation inhibitors and produces ethanol; and Schizosaccharomyces pombe, which cell wall has been reported to be characterized by accumulation of α-(1,3)-glucan and malic acid can be used in metabolic pathways. The results show that S. pombe, isolated from rice paddy fields, can grow efficiently in acetic and propionic acid up to 400 mM and 100 mM, respectively. This species could be cultured in ethanol at a concentration of 12.5% (v/v). Moreover, it presented high ethanol and acetic acid production of 14.5-15.9 g/L and 7-10 g/L, respectively, with or without acidic conditions. In comparison, S. etchellsii, isolated from the botanical garden soil, which is grown in acetic, propionic, and lactic acid, was also indicated to be an organic acid-tolerant species.
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Affiliation(s)
- Supattra Lertsriwong
- Program in Biotechnology, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
- Biofuels By Biocatalysts Research Unit, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
| | | | - Chompunuch Glinwong
- Department of Botany, Faculty of Science, Chulalongkorn University, Bangkok, Thailand.
- Biofuels By Biocatalysts Research Unit, Faculty of Science, Chulalongkorn University, Bangkok, Thailand.
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Segal-Kischinevzky C, Romero-Aguilar L, Alcaraz LD, López-Ortiz G, Martínez-Castillo B, Torres-Ramírez N, Sandoval G, González J. Yeasts Inhabiting Extreme Environments and Their Biotechnological Applications. Microorganisms 2022; 10:794. [PMID: 35456844 PMCID: PMC9028089 DOI: 10.3390/microorganisms10040794] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Revised: 04/06/2022] [Accepted: 04/06/2022] [Indexed: 11/17/2022] Open
Abstract
Yeasts are microscopic fungi inhabiting all Earth environments, including those inhospitable for most life forms, considered extreme environments. According to their habitats, yeasts could be extremotolerant or extremophiles. Some are polyextremophiles, depending on their growth capacity, tolerance, and survival in the face of their habitat's physical and chemical constitution. The extreme yeasts are relevant for the industrial production of value-added compounds, such as biofuels, lipids, carotenoids, recombinant proteins, enzymes, among others. This review calls attention to the importance of yeasts inhabiting extreme environments, including metabolic and adaptive aspects to tolerate conditions of cold, heat, water availability, pH, salinity, osmolarity, UV radiation, and metal toxicity, which are relevant for biotechnological applications. We explore the habitats of extreme yeasts, highlighting key species, physiology, adaptations, and molecular identification. Finally, we summarize several findings related to the industrially-important extremophilic yeasts and describe current trends in biotechnological applications that will impact the bioeconomy.
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Affiliation(s)
- Claudia Segal-Kischinevzky
- Departamento de Biología Celular, Facultad de Ciencias, Universidad Nacional Autónoma de México, Avenida Universidad 3000, Coyoacán, Mexico City 04510, Mexico; (C.S.-K.); (L.D.A.); (B.M.-C.); (N.T.-R.)
| | - Lucero Romero-Aguilar
- Departamento de Bioquímica, Facultad de Medicina, Universidad Nacional Autónoma de México, Avenida Universidad 3000, Coyoacán, Mexico City 04510, Mexico;
| | - Luis D. Alcaraz
- Departamento de Biología Celular, Facultad de Ciencias, Universidad Nacional Autónoma de México, Avenida Universidad 3000, Coyoacán, Mexico City 04510, Mexico; (C.S.-K.); (L.D.A.); (B.M.-C.); (N.T.-R.)
| | - Geovani López-Ortiz
- Subdivisión de Medicina Familiar, Facultad de Medicina, Universidad Nacional Autónoma de México, Avenida Universidad 3000, Coyoacán, Mexico City 04510, Mexico;
| | - Blanca Martínez-Castillo
- Departamento de Biología Celular, Facultad de Ciencias, Universidad Nacional Autónoma de México, Avenida Universidad 3000, Coyoacán, Mexico City 04510, Mexico; (C.S.-K.); (L.D.A.); (B.M.-C.); (N.T.-R.)
| | - Nayeli Torres-Ramírez
- Departamento de Biología Celular, Facultad de Ciencias, Universidad Nacional Autónoma de México, Avenida Universidad 3000, Coyoacán, Mexico City 04510, Mexico; (C.S.-K.); (L.D.A.); (B.M.-C.); (N.T.-R.)
| | - Georgina Sandoval
- Laboratorio de Innovación en Bioenergéticos y Bioprocesos Avanzados (LIBBA), Unidad de Biotecnología Industrial, Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco AC (CIATEJ), Av. Normalistas No. 800 Col. Colinas de la Normal, Guadalajara 44270, Mexico;
| | - James González
- Departamento de Biología Celular, Facultad de Ciencias, Universidad Nacional Autónoma de México, Avenida Universidad 3000, Coyoacán, Mexico City 04510, Mexico; (C.S.-K.); (L.D.A.); (B.M.-C.); (N.T.-R.)
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Lignocellulosic Biomass as a Substrate for Oleaginous Microorganisms: A Review. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10217698] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Microorganisms capable of accumulating lipids in high percentages, known as oleaginous microorganisms, have been widely studied as an alternative for producing oleochemicals and biofuels. Microbial lipid, so-called Single Cell Oil (SCO), production depends on several growth parameters, including the nature of the carbon substrate, which must be efficiently taken up and converted into storage lipid. On the other hand, substrates considered for large scale applications must be abundant and of low acquisition cost. Among others, lignocellulosic biomass is a promising renewable substrate containing high percentages of assimilable sugars (hexoses and pentoses). However, it is also highly recalcitrant, and therefore it requires specific pretreatments in order to release its assimilable components. The main drawback of lignocellulose pretreatment is the generation of several by-products that can inhibit the microbial metabolism. In this review, we discuss the main aspects related to the cultivation of oleaginous microorganisms using lignocellulosic biomass as substrate, hoping to contribute to the development of a sustainable process for SCO production in the near future.
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Patterns of Lignocellulosic Sugar Assimilation and Lipid Production by Newly Isolated Yeast Strains From Chilean Valdivian Forest. Appl Biochem Biotechnol 2020; 192:1124-1146. [PMID: 32700200 DOI: 10.1007/s12010-020-03398-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Accepted: 07/16/2020] [Indexed: 12/19/2022]
Abstract
Three yeast strains were isolated from decaying wood of Chilean Valdivian forest and identified as Meyerozyma guilliermondii, Scheffersomyces coipomensis, and Sugiyamaella paludigena. These strains were able to efficiently grow on the major monomers contained in Pinus spp. and Eucalyptus spp. wood that includes glucose (Glc), xylose (Xyl), and mannose (Man), showing at 28 °C higher uptake rates for Man, and in some cases for Glc, than for Xyl, used as single carbon sources. Nevertheless, in cultures performed on sugar mixtures, the strains displayed a notable preference for Glc. Additionally, in sugar mixtures, the absence of regulatory mechanisms in sugar assimilation (e.g., catabolic repression) was observed and documented when the activities of several enzymes involved in sugar assimilation (i.e., phosphoglucose isomerase, phosphomannose isomerase, and xylulokinase) were determined. The activity of the key enzymes involved in the onset of lipid accumulation (i.e., NAD+-ICDH) and in fatty acid (FA) biosynthesis (i.e., ATP:CL) indicated a significant accumulation of storage lipids (i.e., up to 24%, w/w) containing oleic and palmitic acids as the major components. The present paper is the first report on the potential of M. guilliermondii, S. coipomensis, and S. paludigena as oleaginous yeasts. We conclude that the new isolates, being able to simultaneously assimilate the major lignocellulosic sugars and efficiently convert them into oily biomass, present a biotechnological potential which deserve further investigation.
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Laboratory evolution strategies for improving lipid accumulation in Yarrowia lipolytica. Appl Microbiol Biotechnol 2019; 103:8585-8596. [DOI: 10.1007/s00253-019-10088-7] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Revised: 07/22/2019] [Accepted: 08/08/2019] [Indexed: 01/19/2023]
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Filippousi R, Antoniou D, Tryfinopoulou P, Nisiotou A, Nychas G, Koutinas A, Papanikolaou S. Isolation, identification and screening of yeasts towards their ability to assimilate biodiesel‐derived crude glycerol: microbial production of polyols, endopolysaccharides and lipid. J Appl Microbiol 2019; 127:1080-1100. [DOI: 10.1111/jam.14373] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2018] [Revised: 06/10/2019] [Accepted: 06/24/2019] [Indexed: 01/19/2023]
Affiliation(s)
- R. Filippousi
- Department of Food Science and Human Nutrition Agricultural University of Athens Athens Greece
| | - D. Antoniou
- Department of Food Science and Human Nutrition Agricultural University of Athens Athens Greece
| | - P. Tryfinopoulou
- Department of Food Science and Human Nutrition Agricultural University of Athens Athens Greece
| | - A.A. Nisiotou
- Hellenic Agricultural Organization “Demeter” Institute of Technology of Agricultural Products Lycovryssi Greece
| | - G.‐J. Nychas
- Department of Food Science and Human Nutrition Agricultural University of Athens Athens Greece
| | - A.A. Koutinas
- Department of Food Science and Human Nutrition Agricultural University of Athens Athens Greece
| | - S. Papanikolaou
- Department of Food Science and Human Nutrition Agricultural University of Athens Athens Greece
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Hernández MA, Alvarez HM. Increasing lipid production using an NADP +-dependent malic enzyme from Rhodococcus jostii. MICROBIOLOGY-SGM 2018; 165:4-14. [PMID: 30372408 DOI: 10.1099/mic.0.000736] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The occurrence of NADP+-dependent malic enzymes (NADP+-MEs) in several Rhodococcus strains was analysed. The NADP+-ME number in Rhodococcus genomes seemed to be a strain-dependent property. Total NADP+-ME activity increased by 1.8- and 2.6-fold in the oleaginous Rhodococcus jostii RHA1 and Rhodococcus opacus PD630 strains during cultivation under nitrogen-limiting conditions. Total NADP+-ME activity inhibition by sesamol resulted in a significant decrease of the cellular biomass and lipid production in oleaginous rhodococci. A non-redundant ME coded by the RHA1_RS44255 gene located in a megaplasmid (pRHL3) of R. jostii RHA1 was characterized and its heterologous expression in Escherichia coli resulted in a twofold increase in ME activity in an NADP+-dependent manner. The overexpression of RHA1_RS44255 in RHA1 and PD630 strains grown on glucose promoted an increase in total NADP+-ME activity and an up to 1.9-foldincrease in total fatty acid production without sacrificing cellular biomass. On the other hand, its expression in Rhodococcus fascians F7 grown on glycerol resulted in a 1.3-1.4-foldincrease in total fatty acid content. The results of this study confirmed the contribution of NADP+-MEs to TAG accumulation in oleaginous rhodococci and the utility of these enzymes as an alternative approach to increase bacterial oil production from different carbon sources.
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Affiliation(s)
- Martín A Hernández
- Facultad de Ciencias Naturales, Instituto de Biociencias de la Patagonia, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional de la Patagonia San Juan Bosco, Ruta Provincial no. 1, Km 4-Ciudad Universitaria, 9000 Comodoro Rivadavia, Chubut, Argentina
| | - Héctor M Alvarez
- Facultad de Ciencias Naturales, Instituto de Biociencias de la Patagonia, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional de la Patagonia San Juan Bosco, Ruta Provincial no. 1, Km 4-Ciudad Universitaria, 9000 Comodoro Rivadavia, Chubut, Argentina
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