Occurrence and diversity of marine yeasts in Antarctica environments

Zhang, Xue; Hua, Ming-Xia; Song, Chunli; Chi, Zhen‐Ming

doi:10.1007/s11802-012-1820-2

Cited by 26 publications

(13 citation statements)

References 14 publications

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“…b-galactosidases can be applied in the food and pharmaceutical industries, including for sugar reduction in different foods, development of additives for animal and human diets, and bioconversion of milk whey to reduce industrial effluents [69]. Zhang et al [120], reported that the marine Antarctic yeast Tausonia pullulans 17-1 (formerly Guehomyces pullulans) showed highest extracellular b-galactosidase activity in a medium containing only lactose as the carbon source.…”

Section: Other Hydrolytic Enzymesmentioning

confidence: 99%

Cold-adapted enzymes produced by fungi from terrestrial and marine Antarctic environments

Duarte

Santos

Vianna

et al. 2017

Critical Reviews in Biotechnology

111

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Antarctica is the coldest, windiest, and driest continent on Earth. In this sense, microorganisms that inhabit Antarctica environments have to be adapted to harsh conditions. Fungal strains affiliated with Ascomycota and Basidiomycota phyla have been recovered from terrestrial and marine Antarctic samples. They have been used for the bioprospecting of molecules, such as enzymes. Many reports have shown that these microorganisms produce cold-adapted enzymes at low or mild temperatures, including hydrolases (e.g. α-amylase, cellulase, chitinase, glucosidase, invertase, lipase, pectinase, phytase, protease, subtilase, tannase, and xylanase) and oxidoreductases (laccase and superoxide dismutase). Most of these enzymes are extracellular and their production in the laboratory has been carried out mainly under submerged culture conditions. Several studies showed that the cold-adapted enzymes exhibit a wide range in optimal pH (1.0-9.0) and temperature (10.0-70.0 °C). A myriad of methods have been applied for cold-adapted enzyme purification, resulting in purification factors and yields ranging from 1.70 to 1568.00-fold and 0.60 to 86.20%, respectively. Additionally, some fungal cold-adapted enzymes have been cloned and expressed in host organisms. Considering the enzyme-producing ability of microorganisms and the properties of cold-adapted enzymes, fungi recovered from Antarctic environments could be a prolific genetic resource for biotechnological processes (industrial and environmental) carried out at low or mild temperatures.

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Section: Other Hydrolytic Enzymesmentioning

confidence: 99%

Cold-adapted enzymes produced by fungi from terrestrial and marine Antarctic environments

Duarte

Santos

Vianna

et al. 2017

Critical Reviews in Biotechnology

111

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“…isolated from diseased marine animals (Wang et al, 2009a, b). In our previous study (Chi et al, 2012b;Liu et al, 2009;Zhang et al, 2012), it was found that some strains of A. pullulans did not produce any melanin during their cell growth. They may be identified to be different new varieties of A. pullulans.…”

Section: #2mentioning

confidence: 96%

“…are ubiquitous species found mainly in soil, including Antarctic soils, water, the phylloplane, wood, and many other plant materials, rocks, monuments and limestone (Urz'| et al, 1999). In recent years, they also have been found to be widely distributed in hypersaline habitats, coastal water, deep sea, marine sediments of Antarctica and mangrove systems (Chi et al, 2012b;Gunde-Cimerman et al, 2000;Zhang et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Taxonomy ofAureobasidiumspp. and biosynthesis and regulation of their extracellular polymers

Chi

Wang

et al. 2013

Critical Reviews in Microbiology

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The genus Aureobasidium spp. have been divided into three species, A. pullulans. A. leucospermi and A. proteae, and A. pullulans has been known to have five varieties. However, after analysis of many strains of this yeast isolated from different environments, they do not belong to any of the three species or the five varieties. Although pullulan produced by A. pullulans has been widely used in different fields in industry and different strains of this yeast has been known to produce poly(β-L-malic acid) (PMA), heavy oils and β-1,3-glucan, it is still unknown how the black yeast synthesizes and secretes the extracellular polymers at molecular level. In this review article, new biosynthetic pathways of pullulan, PMA and heavy oils, the enzymes and their genes related to their biosynthesis and regulation are proposed. Furthermore, some enzymes and their genes related to pullulan biosynthesis in A. pullulans have been characterized. But it is completely unknown how pullulan is secreted and how PMA, heavy oils and β-1,3-glucan are synthesized and secreted. Therefore, there is much work to be done about taxonomy and biosynthesis, secretion and regulation of pullulan, PMA, heavy oils and β-1,3-glucan at molecular levels in Aureobasidium spp.

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“…Despite the suggestion that yeasts may be better adapted to low temperatures than bacteria (Shivaji and Prasad 2009), many studies have focused on bacteria; however, the number of reports describing the isolation of yeasts from cold environments is increasing (Guffogg et al 2004;Gilichinsky et al 2005;Russell 2006;de Garcia et al 2007;Turchetti et al 2008;Branda et al 2010;Pathan et al 2010;Thomas-Hall et al 2010;Turchetti et al 2011;Carrasco et al 2012;de Garcia et al 2012;Zhang et al 2012;Singh et al 2013). Considering that yeasts provide the benefits of single-cell fermentations and there are a large number of genetic tools to study and manipulate them, psychrophilic and psychrotolerant yeasts have attracted the attention of scientists for their potential application in various industries.…”

Section: Introductionmentioning

confidence: 99%

Physiological adaptations of yeasts living in cold environments and their potential applications

Alcaı́no

Cifuentes

Baeza

2015

World J Microbiol Biotechnol

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Yeasts, widely distributed across the Earth, have successfully colonized cold environments despite their adverse conditions for life. Lower eukaryotes play important ecological roles, contributing to nutrient recycling and organic matter mineralization. Yeasts have developed physiological adaptations to optimize their metabolism in low-temperature environments, which affect the rates of biochemical reactions and membrane fluidity. Decreased saturation of fatty acids helps maintain membrane fluidity at low temperatures and the production of compounds that inhibit ice crystallization, such as antifreeze proteins, helps microorganisms survive at temperatures around the freezing point of water. Furthermore, the production of hydrolytic extracellular enzymes active at low temperatures allows consumption of available carbon sources. Beyond their ecological importance, interest in psychrophilic yeasts has increased because of their biotechnological potential and industrial uses. Long-chain polyunsaturated fatty acids have beneficial effects on human health, and antifreeze proteins are attractive for food industries to maintain texture in food preserved at low temperatures. Furthermore, extracellular cold-active enzymes display unusual substrate specificities with higher catalytic efficiency at low temperatures than their mesophilic counterparts, making them attractive for industrial processes requiring high enzymatic activity at low temperatures. In this minireview, we describe the physiological adaptations of several psychrophilic yeasts and their possible biotechnological applications.

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Occurrence and diversity of marine yeasts in Antarctica environments

Cited by 26 publications

References 14 publications

Cold-adapted enzymes produced by fungi from terrestrial and marine Antarctic environments

Cold-adapted enzymes produced by fungi from terrestrial and marine Antarctic environments

Taxonomy ofAureobasidiumspp. and biosynthesis and regulation of their extracellular polymers

Physiological adaptations of yeasts living in cold environments and their potential applications

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