The biofilm matrix of P. aeruginosa

项目摘要 生物膜的形成与许多慢性细菌感染有关。因此，已经进行了重要的研究 旨在了解生物膜形成背后的基本生物学。生物膜产生一种胞外 矩阵的部分功能是将社区凝聚在一起。铜绿假单胞菌代表一种 实验室中生物膜研究的范例物种。基质生产的调节和基质的 都对基质的碳水化合物成分进行了检测。然而，蛋白质成分中的 生物膜基质的研究相对较少。我们的研究小组确定了一种P。 铜绿假单胞菌CDRA。CDRA通过细胞外与基质的相互作用提供结构完整性 多糖类PSL。除了提供结构功能的基质蛋白外，我们预测基质 相关蛋白质对群落既能起到营养作用，又能起到保护作用。该项目最初将 重点关注CDRA及其在信息总库中的作用。然后，我们将确定Ecotin是一种基质结合的蛋白酶抑制剂，并 三种基质相关的蛋白酶。最后，我们将确定与EPS相关的新的基质蛋白 生物膜基质的成分。

Project Summary Biofilm formation has been linked to many chronic bacterial infections. Thus, significant research has been directed towards understanding the basic biology behind biofilm formation. Biofilms produce an extracellular matrix that functions, in part, to hold the community together. Pseudomonas aeruginosa represents a paradigm species for the study of biofilms in the laboratory. The regulation of matrix production and the carbohydrate component of the matrix have both been examined. However, the protein component of the biofilm matrix has been relatively understudied. Our groups identified a biofilm matrix protein for P. aeruginosa, CdrA. CdrA provides structural integrity through extracellular interactions with the matrix polysaccharide Psl. Outside of matrix proteins that provide structural functions, we predict that matrix associated proteins can play both nutritional and protective roles for the community. This project will initially focus on CdrA and its role in the matrix. We will then characterize ecotin a matrix bound protease inhibitor and three matrix-associated proteases. Finally, we will identify new matrix proteins that associate with eps component of the biofilm matrix.