期刊
FRONTIERS IN CELLULAR AND INFECTION MICROBIOLOGY
卷 11, 期 -, 页码 -出版社
FRONTIERS MEDIA SA
DOI: 10.3389/fcimb.2021.679792
关键词
Streptococcus agalactiae; MK-rich domain; plasminogen; cell wall-proteins; adhesion molecules
资金
- PRIN (Programma di Ricerca Scientifica di Rilevante Interesse Nazionale) [2017M8R7N9_002]
- Ministero dell'Universita and Ricerca Scientifica (MIUR) of Italy
- FFABR (Fund For Basic Research Activities)
- Doctoral School in Translational Molecular Medicine and Surgery, Department of Biomedical, Dental and Imaging Sciences, University of Messina, Messina, Italy [DR_36_TRAN_PON_ IND_1]
The study identified the importance of Plg's K4 Kringle domain in binding to the bacterial protein PbsP, with lysine binding sites in the Plg molecule playing a key role in the interaction. Interestingly, mutating lysine residues in PbsP did not decrease its ability to bind Plg, indicating a novel bacterial sequence that can interact with lysine binding sites in the Plg molecule.
Binding to plasminogen (Plg) enables bacteria to associate with and invade host tissues. The cell wall protein PbsP significantly contributes to the ability of group B streptococci, a frequent cause of invasive infection, to bind Plg. Here we sought to identify the molecular regions involved in the interactions between Plg and PbsP. The K4 Kringle domain of the Plg molecule was required for binding of Plg to whole PbsP and to a PbsP fragment encompassing a region rich in methionine and lysine (MK-rich domain). These interactions were inhibited by free L-lysine, indicating the involvement of lysine binding sites in the Plg molecule. However, mutation to alanine of all lysine residues in the MK-rich domain did not decrease its ability to bind Plg. Collectively, our data identify a novel bacterial sequence that can interact with lysine binding sites in the Plg molecule. Notably, such binding did not require the presence of lysine or other positively charged amino acids in the bacterial receptor. These data may be useful for developing alternative therapeutic strategies aimed at blocking interactions between group B streptococci and Plg.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据