Beighton D, Homer K A, Bouvet A, Storey A R
RCS Department of Dental Sciences, Faculty of Clinical Dentistry, King's College School of Medicine and Dentistry, London, United Kingdom.
J Clin Microbiol. 1995 Jun;33(6):1584-7. doi: 10.1128/jcm.33.6.1584-1587.1995.
Strains of nutritionally variant streptococci, Streptococcus defectivus (n = 10) and Streptococcus adjacens (n = 20), were studied for the production of glycosidic and proteolytic enzyme activities. S. defectivus strains produced neuraminidase and alpha-fucosidase, while S. adjacens strains produced only neuraminidase. The S. adjacens strains produced a very wide range of proteolytic activities with the ability to hydrolyze the majority of aminopeptidase substrates tested, while S. defectivus strains hydrolyzed only a minority of aminopeptidase substrates. These data provide additional phenotypic characteristics which may be useful in distinguishing between these two species and suggest that they may have different nutritional requirements.
对营养变异链球菌菌株,即缺陷链球菌(n = 10)和毗邻链球菌(n = 20)进行了糖苷酶和蛋白水解酶活性产生情况的研究。缺陷链球菌菌株产生神经氨酸酶和α-岩藻糖苷酶,而毗邻链球菌菌株仅产生神经氨酸酶。毗邻链球菌菌株产生非常广泛的蛋白水解活性,能够水解所测试的大多数氨肽酶底物,而缺陷链球菌菌株仅水解少数氨肽酶底物。这些数据提供了额外的表型特征,可能有助于区分这两个菌种,并表明它们可能有不同的营养需求。