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Biobank of fungi from marine and terrestrial Antarctic environments
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NARDO, VICTOR G.

; OTERO, IGOR V.R.

; GIOVANELLA, PATRICIA

; SANTOS, JULIANA APARECIDA DOS

; PELLIZZER, ELISA P.

; DOVIGO, DANIEL R.

; PAES, EDUARDO C.P.

; SETTE, LARA D.

Anais da Academia Brasileira de Ciências

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2023, Volume 95 Suppl. 3 elocation e20230603

Abstract: En | Text: En | PDF: En

Abstract Harsh and extreme environments, such as Antarctica, offer unique opportunities to explore new microbial taxa and biomolecules. Given the limited knowledge on microbial diversity, this study aimed to compile, analyze and compare a subset of the biobank of Antarctic fungi maintained at the UNESP’s Central of Microbial Resources (CRM-UNESP). A total of 711 isolates (240 yeasts and 471 filamentous fungi) from marine and terrestrial samples collected at King George Island (South Shetland Islands, Antarctica) were used with the primary objective of investigating their presence in both marine and terrestrial environments. Among the yeasts, 13 genera were found, predominantly belonging to the phylum Basidiomycota. Among the filamentous fungi, 34 genera were represented, predominantly from the phylum Ascomycota. The most abundant genera in the marine samples were Metschnikowia, Mrakia, and Pseudogymnoascus, while in the terrestrial samples, they were Pseudogymnoascus, Leucosporidium, and Mortierella. Most of the genera and species of the CRM-UNESP biobank of Antarctic fungi are being reported as an important target for biotechnological applications. This study showed the relevance of the CRM-UNESP biobank, highlighting the importance of applying standard methods for the preservation of the biological material and associated data (BMaD), as recommended in national and international standards.

https://doi.org/10.1590/0001-3765202320230603

Antarctic-derived yeasts: taxonomic identification and resistance to adverse conditions
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FARIAS, GABRIELE S.

; SANTOS, JULIANA A.

; GIOVANELLA, PATRICIA

; SETTE, LARA D.

Anais da Academia Brasileira de Ciências

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2022, Volume 94 Suppl. 1 elocation e20210592

Abstract: En | Text: En | PDF: En

Abstract Antarctic harsh conditions favor the development of microbial adaptations. In this study, a molecular approach was applied to identify/refine the taxonomy of five yeasts isolated from different Antarctic samples, which were tested against ranges of temperature, UV radiations, salinity, and pH. Based on sequencing and phylogenetic analysis, strain CRM 1839 was confirmed as Naganishia sp., and strains CRM 1874, CRM 1565, CRM 2571, and CRM 2576 were identified as Goffeauzyma gilvescens, Goffeauzyma gastrica, Candida atlantica, and Camptobasidium sp., respectively, being this last one possibly a new species. Growth at different temperatures indicates that these yeasts are psychrotolerant, with the exception of Camptobasidium sp., which presents psychrophilic characteristics. G. gastrica recovered from marine sediment showed the best results of resistance to UV radiation, being able to grow even after the exposure to UVB dose of 9144 J/m² and UVC dose of 6102 J/m². C. atlantica isolated from glacier soil showed high cellular growth from 3 to 10% NaCl. The majority of the strains produced higher biomass at pH 7; nevertheless, G. gilvescens showed higher biomass production at pH 9. The studied Antarctic-derived yeasts have adaptations to extreme conditions, which makes them useful for biotechnological applications and studies of extremophiles.

https://doi.org/10.1590/0001-3765202220210592

Antarctic fungi applied to textile dye bioremediation
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KITA, DANIELA M.

; GIOVANELLA, PATRICIA

; YOSHINAGA, THAÍS T.

; PELLIZZER, ELISA P.

; SETTE, LARA D.

Anais da Academia Brasileira de Ciências

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2022, Volume 94 Suppl. 1 elocation e20210234

Abstract: En | Text: En | PDF: En

Abstract Antarctica has one of the most hostile conditions on the planet. The environmental characteristics found in this region favor the development of extremophile microorganisms, which are poorly explored biotechnologically. In this context, this study aimed at selectively isolating fungi with potential for the bioremediation of a textile dye. A total of 11 filamentous fungi were isolated from Antarctic samples after incubation in Minimal Mineral medium with the addition of Sulphur Indigo Blue dye. The Antarctic-derived fungi were submitted to textile dye decolorization analysis and biomass production. Isolates LAMAI 2400 and LAMAI 2402 showed more than 90% of decolorization at 15 °C, whereas at 28 °C these isolates showed 81.86 and 98.89%, respectively. In general, the toxicity of the bioassays, evaluated using Cucumis sativus, was higher than in the control. Both isolates, LAMAI 2400 and LAMAI 2402, were identified as Penicillium cf. oxalicum and classified as mesophilic-psychrotolerant. This fungal species has rarely been reported in the Antarctic environments. The results presented herein indicate the potential of the fungi recovered from Antarctic marine sediments for bioremediation of textile dyes at low and moderate temperatures, broadening the perspectives in the field of Antarctic mycology.

https://doi.org/10.1590/0001-3765202220210234

Antarctic environments as a source of bacterial and fungal therapeutic enzymes
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LIMA, IGOR G.O.

; BISPO, JAMES R.S.

; AGOSTINHO, ADSON Y.H.

; QUEIROZ, ALINE C. DE

; MOREIRA, MAGNA SUZANA A.

; PASSARINI, MICHEL RODRIGO Z.

; OLIVEIRA, VALÉRIA M. DE

; SETTE, LARA D.

; ROSA, LUIZ HENRIQUE

; DUARTE, ALYSSON WAGNER F.

Anais da Academia Brasileira de Ciências

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2022, Volume 94 Suppl. 1 elocation e20210452

Abstract: En | Text: En | PDF: En

Abstract Microbial therapeutic enzymes are the protagonists in the pharmacological treatment of different human diseases. The intrinsic enzymatic characteristics, such as high affinity and specificity to the corresponding substrate, enable effective therapies, with minimal adverse effects and complete remission. However, immunogenicity, short half-life, low enzymatic yield, and low selectivity regarding available enzyme drugs are currently the main obstacles to their development and the broad adherence to therapeutic protocols. By harboring adapted and still unexplored microbial life, environments of extreme conditions, such as Antarctica, become especially important in the prospecting and development of new enzymatic compounds that present higher yields and the possibility of genetic improvement. Antarctic microorganisms have adaptation mechanisms, such as more fluid cell membranes, production of antifreeze proteins and enzymes with more malleable structures, more robust, stable, selective catalytic sites for their respective substrates, and high antioxidant capacity. In this context, this review aims to explore enzymes synthesized by bacteria and fungi from Antarctica as potential drug producers, capable of providing therapeutic efficacy, less adverse effects, and lower production costs with highlight to L-Asparaginase, collagenase, superoxide dismutase and ribonucleases. In addition, this review highlights the unique biotechnological profile of these Antarctic extremophile microorganisms.

https://doi.org/10.1590/0001-3765202220210452

Polycyclic aromatic hydrocarbons degradation by marine-derived basidiomycetes: optimization of the degradation process
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Vieira, Gabriela A.L.

; Magrini, Mariana Juventina

; Bonugli-Santos, Rafaella C.

; Rodrigues, Marili V.N.

; Sette, Lara D.

Brazilian Journal of Microbiology

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dec 2018, Volume 49 N. 4 Pages 749 - 756

Abstract: En | Text: En | PDF: En

ABSTRACT Pyrene and benzo[a]pyrene (BaP) are high molecular weight polycyclic aromatic hydrocarbons (PAHs) recalcitrant to microbial attack. Although studies related to the microbial degradation of PAHs have been carried out in the last decades, little is known about degradation of these environmental pollutants by fungi from marine origin. Therefore, this study aimed to select one PAHs degrader among three marine-derived basidiomycete fungi and to study its pyrene detoxification/degradation. Marasmiellus sp. CBMAI 1062 showed higher levels of pyrene and BaP degradation and was subjected to studies related to pyrene degradation optimization using experimental design, acute toxicity, organic carbon removal (TOC), and metabolite evaluation. The experimental design resulted in an efficient pyrene degradation, reducing the experiment time while the PAH concentration applied in the assays was increased. The selected fungus was able to degrade almost 100% of pyrene (0.08 mg mL-1) after 48 h of incubation under saline condition, without generating toxic compounds and with a TOC reduction of 17%. Intermediate metabolites of pyrene degradation were identified, suggesting that the fungus degraded the compound via the cytochrome P450 system and epoxide hydrolases. These results highlight the relevance of marine-derived fungi in the field of PAH bioremediation, adding value to the blue biotechnology.

https://doi.org/10.1016/j.bjm.2018.04.007 1171 downloads

A STRATEGY FOR THE RAPID IDENTIFICATION OF FUNGAL METABOLITES AND THE DISCOVERY OF THE ANTIVIRAL ACTIVITY OF PYRENOCINE A AND HARZIANOPYRIDONE
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Ióca, Laura P.

; Romminger, Stelamar

; Santos, Mario F. C.

; Bandeira, Karin F.

; Rodrigues, Fabiana T.

; Kossuga, Miriam H.

; Nicacio, Karen J.

; Ferreira, Everton L. F.

; Morais-Urano, Raquel P.

; Passos, Messias S.

; Kohn, Luciana K.

; Arns, Clarice W.

; Sette, Lara D.

; Berlinck, Roberto G. S.

Química Nova

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jul 2016, Volume 39 N. 6 Pages 720 - 731

Abstract: En | Text: En | PDF: En

The isolation and identification of bioactive metabolites from complex extracts obtained from microbial growth media is a time consuming, costly, and labor-intensive task. A strategy to rapidly identify secondary metabolites isolated from extracts obtained from the culture media of marine-derived and endophytic fungal strains is described. Identification was achieved by HPLC-UV-MS and 1H NMR analyses in combination with data obtained from the Dictionary of Natural Products. Among the compounds identified, (-)-naphthoquinoneimine, citreorosein, emodin, pyrenocine A and harzianopyridone displayed moderate to potent antiviral activity. (-)-Naphthoquinoneimine was isolated as the enantiomer of its previously reported dextrorotatory congener, while 6,7-dihydroxy-2,2-dimethyl-4-chromanone is herein reported for the first time as a natural product.

https://doi.org/10.5935/0100-4042.20160092 2688 downloads

Selection of thermophilic and thermotolerant fungi for the production of cellulases and xylanases under solid-state fermentation
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Moretti, Marcia M. S.

; Bocchini-Martins, Daniela A.

; Silva, Roberto Da

; Rodrigues, André

; Sette, Lara D.

; Gomes, Eleni

Brazilian Journal of Microbiology

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sep 2012, Volume 43 N. 3 Pages 1062 - 1071

Abstract: En | Text: En | PDF: En

Twenty-seven thermophilic and thermotolerant fungal strains were isolated from soil, decaying organic matter and sugarcane piles based on their ability to grow at 45ºC on medium containing corn straw and cardboard as carbon sources. These fungi were identified in the genera Aspergillus, Thermomyces, Myceliophthora, Thermomucor and Candida. The majority of the isolated strains produced xylanase and cellulases under solid state fermentation (SSF). The highest cellulase and xylanase productions were obtained by the cultivation of the strains identified as Aspergillus fumigatus M.7.1 and Myceliophthora thermophila M.7.7. The enzymes from these strains exhibited maximum activity at pH 5.0 and at 60 and 70ºC. The endo-glucanase from A. fumigatus was stable from 40ºC to 65ºC and both endo-glucanase and xylanase from M. thermophila were stable in this temperature range when in absence of substrate. The enzymes were stable from pH 4.0 to 9.0.

6069 downloads

Evaluating methods for the isolation of marine-derived fungal strains and production of bioactive secondary metabolites
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Kossuga, Miriam H.

; Romminger, Stelamar

; Xavier, Camila

; Milanetto, Marília C.

; Valle, Milene Z. do

; Pimenta, Eli F.

; Morais, Raquel P.

; Carvalho, Erica de

; Mizuno, Carolina M.

; Coradello, Luís Fernando C.

; Barroso, Vinícius de M.

; Vacondio, Bruna

; Javaroti, Darci C. D.

; Seleghim, Mirna H. R.

; Cavalcanti, Bruno C.

; Pessoa, Claudia

; Moraes, Manoel O.

; Lima, Bruna A.

; Gonçalves, Reginaldo

; Bonugli-Santos, Rafaella C.

; Sette, Lara D.

; Berlinck, Roberto G. S.

Revista Brasileira de Farmacognosia

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apr 2012, Volume 22 N. 2 Pages 257 - 267

Abstract: En | Text: En | PDF: En

In the present investigation we evaluate methods for the isolation and growth of marine-derived fungal strains in artificial media for the production of secondary metabolites. Inoculation of marine macroorganisms fragments in Petri dishes proved to be the most convenient procedure for the isolation of the largest number of strains. Among the growth media used, 3% malt extract showed the best result for strains isolation and growth, and yielded the largest number of strains from marine macroorganisms. The percentage of strains isolated using each of the growth media which yielded cytotoxic and/or antibiotic extracts was in the range of 23-35%, regardless of the growth media used. Further investigation of extracts obtained from different marine-derived fungal strains yielded several bioactive secondary metabolites, among which (E)-4-methoxy-5-(3-methoxybut-1-enyl)-6-methyl-2H-pyran-2-one is a new metabolite isolated from the Penicillium paxilli strain Ma(G)K.

10199 downloads

Improved extraction method to evaluate the degradation of selected PAHs by marine fungi grown in fermentative medium
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Passarini, Michel R. Z

; Sette, Lara D

; Rodrigues, Marili V. N

Journal of the Brazilian Chemical Society

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mar 2011, Volume 22 N. 3 Pages 564 - 570

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

O estudo propõe um método otimizado para avaliar a degradação de hidrocarbonetos policíclicos aromáticos (HPAs) por fungos filamentosos. A adsorção dos HPAs pelo micélio requer o emprego de uma extração exaustiva, normalmente realizada através da combinação de diferentes técnicas aplicadas, separadamente, ao meio líquido e ao micélio. Este trabalho sugere uma simplificação da etapa de extração, reduzindo o tempo de análise e a manipulação da amostra e garantindo a precisão e a exatidão do método. Os HPAs selecionados, pireno e benzo[a]pireno, foram quantificados por cromatografia gasosa usando detector seletivo de massas operando no modo de monitoramento seletivo de íons. O método foi validado apresentando exatidão no âmbito estudado e utilizado para a avaliação do potencial de degradação de HPAs por treze fungos derivados de ambiente marinho. O estudo selecionou o fungo Aspergillus sclerotiorum CBMAI 849 pela capacidade de degradação de 85% de pireno e 61% de benzo[a]pireno após 4 e 8 dias, respectivamente, e o fungo Mucor racemosus CBMAI 847 pela capacidade de degradação de 44% de benzo[a]pireno após 8 dias

An improved method to evaluate the degradation of polycyclic aromatic hydrocarbons (PAHs) for filamentous fungi is hereby proposed. The PAH adsorption through fungal mycelia implies the use of an exhaustive extraction, which is usually performed through a combination of different techniques applied separately to the liquid medium and to the mycelia. This work proposes a simplified extraction procedure with reduced analysis time and sample manipulation, thereby guaranteeing its precision and accuracy. The selected PAHs, pyrene and benzo[a]pyrene, were quantified by gas chromatography using a mass selective detector operating in single ion monitoring mode. The method was validated presenting accuracy within the scope of this study and it was used for evaluating the potential of PAHs degradation by thirteen fungi derived from marine environment. This study selected the fungus Aspergillus sclerotiorum CBMAI 849 for being able to degrade 85% of pyrene and 61% of benzo[a]pyrene after 4 and 8 days, respectively, and the fungus Mucor racemosus CBMAI 847 for being able to degrade 44% of benzo[a]pyrene after 8 days

3055 downloads

10.

A multi-screening approach for marine-derived fungal metabolites and the isolation of cyclodepsipeptides from Beauveria felina
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Vita-Marques, Aline Maria de

; Lira, Simone P.

; Berlinck, Roberto G. S.

; Seleghim, Mirna H. R.

; Sponchiado, Sandra R. P.

; Tauk-Tornisielo, Sâmia M.

; Barata, Margarida

; Pessoa, Claudia

; Moraes, Manoel O. de

; Cavalcanti, Bruno Coêlho

; Nascimento, Gislene G. F.

; Souza, Ana O. de

; Galetti, Fabio C. S.

; Silva, Célio L.

; Silva, Marcio

; Pimenta, Eli F.

; Thiemann, Otavio

; Passarini, Michel R. Z.

; Sette, Lara D.

Química Nova

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2008, Volume 31 N. 5 Pages 1099 - 1103

Abstract: En | Text: En | PDF: En

Extracts obtained from 57 marine-derived fungal strains were analyzed by HPLC-PDA, TLC and ¹H NMR. The analyses showed that the growth conditions affected the chemical profile of crude extracts. Furthermore, the majority of fungal strains which produced either bioactive of chemically distinctive crude extracts have been isolated from sediments or marine algae. The chemical investigation of the antimycobacterial and cytotoxic crude extract obtained from two strains of the fungus Beauveria felina have yielded cyclodepsipeptides related to destruxins. The present approach constitutes a valuable tool for the selection of fungal strains that produce chemically interesting or biologically active secondary metabolites.

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