ergosterol


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ergosterol

 [er-gos´ter-ol]
a sterol occurring in animal and plant tissues which on irradiation by ultraviolet rays converts to vitamin D2, a potent agent for the prevention of rickets, ergocalciferol.

er·gos·ter·ol

(er-gos'tĕr-ol),
The most important of the D2 provitamins; ultraviolet irradiation converts ergosterol to lumisterol, tachysterol, and ergocalciferol; main sterol in yeast, ergot, and molds.
Synonym(s): ergosterin

ergosterol

(ûr-gŏs′tə-rôl′, -rōl′)
n.
A crystalline sterol, C28H43OH, synthesized by yeast from sugars or derived from ergot and converted to vitamin D2 when exposed to ultraviolet radiation.

er·gos·ter·ol

(ĕr-gos'tĕr-ol)
The most important of the D2 provitamins; ultraviolet irradiation converts ergosterol to lumisterol, tachysterol, and ergocalciferol; main sterol in yeast.

ergosterol

A sterol found in fungal cell membranes which, when exposed to ultraviolet light, is converted into vitamin D2 (ergocalciferol) and to other, toxic, substances.
References in periodicals archive ?
We investigated the phenotypes associated with the ergosterol biosynthesis pathway in IFM 63240, a representative of the isolate from the third testing day.
Actua inhibiendo la lanosterol 14-[alfa] demetilasa, enzima necesaria para la sintesis de ergosterol, por lo que altera la membrana fungica y el crecimiento celular (38).
Morita, "Molecular mechanisms of antifungal agents associated with membrane ergosterol. Dysfunction of membrane ergosterol and inhibition of ergosterol biosynthesis," in In Vitro and in Vivo Evaluation of Antifungal Agents, K.
Despite differences in degradative ability, both fungi produced similar amounts of ergosterol, a proxy for total fugal biomass [22], as well as similar amounts of secreted protein on sorghum when compared at equivalent timepoints.
While amphotericin B has a higher affinity for the ergosterol component of the fungal cell membrane, it can also bind to the cholesterol component of the mammalian cell leading to cytotoxicity19.
The antifungal drugs currently available for the treatment of invasive mycoses can be divided into four different classes on the basis of their mechanisms of action: (1) Alteration of membrane function (amphotericin B); (2) inhibition of DNA or RNA synthesis (flucytosine); (3) inhibition of ergosterol biosynthesis (azoles [fluconazole, itraconazole, and the newer agents voriconazole, posaconazole, and ravuconazole]); and (4) inhibition of glucan synthesis (echinocandins [caspofungin, micafungin, and anidulafungin]).
La anfotericina B y otros polienos, como la nistatina, se fijan al ergosterol en las membranas celulares de los hongos y aumentan su permeabilidad.
Ravuconazole demonstrates antifungal activity by inhibiting ergosterol biosynthesis, a membrane component of fungal cells.
Xuezhikang contains the 3-hydroxy-3-methylglutaryl coenzyme A (HMG-CoA) reductase inhibitor lovastatin, flavonoids, ergosterol amino acids, unsaturated fatty acids, trace elements, and other effective components.
Going into the contents of the material, the scientists did a chemical analysis to find ergosterol, an organic molecule that could be left behind from baking, the scientists wrote, although it could also be an indicator of brewing or agriculture.
albicans is performed using systemic and topical antifungal, mainly from the group of azole drugs, the main representatives are ketoconazole, miconazole, itraconazole, fluconazole, voriconazole and posaconazole, which have the same mechanism of action, inhibiting the synthesis of ergosterol. The foremost differences of this group of drugs are pharmacokinetic and toxicity (Guinea et al., 2014).
In the absence of oxygen that stimulates ergosterol production by yeast, unsaturated fatty acids and sterols derived from grapes are essential to anaerobic yeast growth (2-4 mg/L phytosterols is required for maximal growth).