酵母产生细胞外脱氧核糖核酸酶
Extracellular deoxyribonuclease production by yeasts.
作者信息
Cazin J, Kozel T R, Lupan D M, Burt W R
出版信息
J Bacteriol. 1969 Nov;100(2):760-2. doi: 10.1128/jb.100.2.760-762.1969.
A total of 20 genera of yeasts and yeastlike organisms were tested for their ability to produce an extracellular deoxyribonuclease. Results indicate that ability to produce the enzyme appears to be a specific characteristic of the three genera Rhodotorula, Cryptococcus, and Tremella. A single strain of Endomycopsis fibuligera was also shown to be positive for the enzyme. In comparing the ability of the organisms to excrete extracellular deoxyribonuclease with their ability to produce urease, a surprisingly close correlation was found. With the exception of Lipomyces starkeyi, all the organisms which were deoxyribonuclease-negative were also urease-negative. Of those organisms which were deoxyribonuclease-positive, only E. fibuligera was urease-negative. The ability of cryptococci to produce extracellular deoxyribonuclease is discussed in relation to the implication which this finding may have for the taxonomy and phylogeny of the genus.
对总共20个属的酵母和酵母样生物进行了产生细胞外脱氧核糖核酸酶能力的测试。结果表明，产生该酶的能力似乎是红酵母属、隐球菌属和银耳属这三个属的特定特征。还发现一株产朊假丝酵母也呈该酶阳性。在比较这些生物分泌细胞外脱氧核糖核酸酶的能力与其产生脲酶的能力时，发现了惊人的密切相关性。除了斯达氏油脂酵母外，所有脱氧核糖核酸酶阴性的生物也是脲酶阴性。在那些脱氧核糖核酸酶阳性的生物中，只有产朊假丝酵母是脲酶阴性。结合这一发现可能对隐球菌属的分类学和系统发育产生的影响，讨论了隐球菌产生细胞外脱氧核糖核酸酶的能力。
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