Antikainen Jenni, Kuparinen Veera, Lähteenmäki Kaarina, Korhonen Timo K
General Microbiology, Faculty of Biosciences, P.O. Box 56, FIN-00014 University of Helsinki, Finland.
J Bacteriol. 2007 Jun;189(12):4539-43. doi: 10.1128/JB.00378-07. Epub 2007 Apr 20.
The plasminogen-binding proteins enolase and glyceraldehyde-3-phosphate dehydrogenase of Lactobacillus crispatus were localized on the cell surface at pH 5 but released into the medium at an alkaline pH. These proteins bound to lipoteichoic acids at a pH below their isoelectric point. The results indicate that lactobacilli rapidly modify their surface properties in response to changes in pH.
卷曲乳杆菌的纤溶酶原结合蛋白烯醇化酶和甘油醛-3-磷酸脱氢酶在pH 5时定位于细胞表面,但在碱性pH下释放到培养基中。这些蛋白质在低于其等电点的pH下与脂磷壁酸结合。结果表明,乳酸杆菌会根据pH值的变化迅速改变其表面性质。