Breierová Emília, Vajcziková Ingrid, Sasinková Vlasta, Stratilová Eva, Fisera Iav, Gregor Tomás, Sajbidor Ján
Institute of Chemistry Slovak Academy of Sciences, Bratislava.
Z Naturforsch C J Biosci. 2002 Jul-Aug;57(7-8):634-9. doi: 10.1515/znc-2002-7-815.
Toxicity and accumulation of Cd2+ in yeasts were studied in eight different yeast species. The adaptation to toxic concentration of this metal was dependent on the production of extracellular yeast glycoproteins. The highest concentration of Cd2+ ions in the growth medium was tolerated by a Hansenula anomala, strain while the lowest tolerance was found by the strain of species Saccharomyces cerevisiae. Extracellular glycoproteins of Hansenula anomala absorbed nearly 90% of the total content of Cd2+ ions bound by yeast cells, while extracellular glycoproteins of Saccharomyces cerevisiae bound only 6% of the total amount of cadmium. This difference is caused by the variable composition of the saccharide moiety in the extracellular glycoproteins. The composition of extracellular glycoproteins changed during the adaptation of the yeast cells to the presence of Cd2+ ions.
在八种不同的酵母菌种中研究了镉离子（Cd2+）在酵母中的毒性和积累情况。酵母对这种金属毒性浓度的适应性取决于细胞外酵母糖蛋白的产生。异常汉逊酵母菌株能够耐受生长培养基中最高浓度的Cd2+离子，而酿酒酵母菌株的耐受性最低。异常汉逊酵母的细胞外糖蛋白吸收了酵母细胞结合的Cd2+离子总量的近90%，而酿酒酵母的细胞外糖蛋白仅结合了镉总量的6%。这种差异是由细胞外糖蛋白中糖部分的可变组成引起的。在酵母细胞适应Cd2+离子存在的过程中，细胞外糖蛋白的组成发生了变化。
