Utilization of nitriles by yeasts isolated from a Brazilian gold mine.

Rezende, Rachel Passos; Dias, João Carlos Teixeira; Rosa, Carlos A.; Carazza, Fernando; Linardi, Valter R.

doi:10.2323/jgam.45.185

Cited by 26 publications

(21 citation statements)

References 23 publications

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“…Generally, it has been suggested that simple aliphatic nitriles are metabolized in a two-step process by nitrile hydratase and amidase (1). Rezende et al (12) reported a nitrile degrading enzyme that shows the presence of nitrile hydratase and amidase and demonstrated acid and amide formation during propionitrile degradation by Cryptococcus sp UFMG-Y28. The ability of Geotrichum sp.…”

Section: Resultsmentioning

confidence: 99%

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The use of acetonitrile as the sole nitrogen and carbon source by Geotrichum sp. JR1

Rezende¹,

Dias²,

Monteiro³

et al. 2004

Braz. J. Microbiol.

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A yeast strain identified as Geotrichum sp. JR1 was able to use acetonitrile as the sole carbon and nitrogen source. The strain grew in 0.5 to 2M acetonitrile. Ammonia generation as enzymatic product during the strain growth indicates the presence of an acetonitrile degrading enzyme. Acetic acid and acetamide were detected during assays with the resting cells cultivated in acetonitrile, indicating the presence of nitrile and amide degrading enzymes. This paper is the first to describe the use of acetonitrile as the sole carbon and nitrogen source by a yeast.

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Section: Resultsmentioning

confidence: 99%

“…Few studies have been carried out on the use of nitriles by yeasts (2,3,4,9,12). All these studies reported the use of nitriles and corresponding amides as the only nitrogen source.…”

Section: Introductionmentioning

confidence: 99%

The use of acetonitrile as the sole nitrogen and carbon source by Geotrichum sp. JR1

Rezende¹,

Dias²,

Monteiro³

et al. 2004

Braz. J. Microbiol.

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“…The nitrile degrading yeasts isolated from various habitats have been listed in Table 32.2 . The enrichment culture techniques have been used to isolate yeasts from water samples collected from gold extraction circuits and cyanide treatment bioreactor (Rezende et al, 1999 ). These researchers have isolated around fifty two yeast strains belonging to Candida, Debaryomyces, Aureobasidium, Geotrichum, Pichia, Rhodotorula, Tremella, Hanseniaspora and Cryptococcus genera.…”

Section: Isolation Of Nitrile Metabolizing Yeastsmentioning

confidence: 99%

“…The nitrile metabolizing yeasts have been isolated from habitats as diverse as fermented foods (Prasad et al, 2005 ) and cyanide treatment bioreactor (Rezende et al, 1999 ;van der Walt et al, 1993 ;Brewis et al, 1995 ;Dias et al, 2000a ). The nitrile degrading yeasts isolated from various habitats have been listed in Table 32.2 .…”

Section: Isolation Of Nitrile Metabolizing Yeastsmentioning

confidence: 99%

Nitrile Metabolizing Yeasts

Bhalla

Sharma

2009

Yeast Biotechnology: Diversity and Applications

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“…Among the yeasts isolated, 14 grew in YNB with phenol concentrations up to 10 mM, and were selected for the tests of phenol degradation in YNB liquid. Another study has cited the occurrence of yeasts in the stressed environment of a gold extraction liquid circuit, in which the cyanide concentration varies from 150 to 300 ppm, and the isolated yeasts belonged to the genera Candida, Debaryomyces, Aureobasidium, Geotrichum, Pichia, Rhodotorula, Tremella, Hanseniaspora and Cryptococcus (Rezende et al, 1999). It has been suggested that some yeasts isolated from all types of water, for example Aureobasidium and Rhodotorula that normally are associated with foliage and soil, probably enter water with run-off (Hagler and Ahearn, 1987).…”

Section: Isolation and Tests Of Phenol Tolerancementioning

confidence: 99%

Phenol degradation by yeasts isolated from industrial effluents.

Santos

Linardi

2001

J. Gen. Appl. Microbiol.

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Yeast strains of the genera Aureobasidium, Rhodotorula and Trichosporon were isolated from stainless steel effluents and tested for their ability to utilize phenol as the sole carbon source. Fourteen strains grew in the presence of up to 10 mM phenol. Only the strain Trichosporon sp. LE3 was able to grow in the presence of up to 20 mM phenol. An inhibitory effect was observed at concentrations higher than 11 mM, resulting in reduction of specific growth rates. Phenol degradation was a function of strain, time of incubation and initial phenol concentration. All strains exhibited activity of catechol 1,2-dioxygenase and phenol hydroxylase in free cell extracts from cells grown on phenol, suggesting that catechol was oxidized by the ortho type of ring fission. Addition of glucose and benzoate reduced the phenol consumption rate, and both substrates were used simultaneously. Glucose concentrations higher than 0.25% inhibited the induction of phenol oxidation by non-proliferating cells and inhibited phenol oxidation by pre-induced cells.

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Utilization of nitriles by yeasts isolated from a Brazilian gold mine.

Cited by 26 publications

References 23 publications

The use of acetonitrile as the sole nitrogen and carbon source by Geotrichum sp. JR1

The use of acetonitrile as the sole nitrogen and carbon source by Geotrichum sp. JR1

Nitrile Metabolizing Yeasts

Phenol degradation by yeasts isolated from industrial effluents.

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