Bacterial cyclic AMP-phosphodiesterase activity coordinates biofilm formation.

Bacterial cyclic AMP-phosphodiesterase activity coordinates biofilm formation.
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细菌环AMP-磷酸二酯酶活性协调生物膜的形成。

DOI:
10.1371/journal.pone.0071267
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发表时间:
2013
期刊:
影响因子:
3.7
通讯作者:
Shanks RM
Shanks RM
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Kalivoda EJ;Brothers KM;Stella NA;Schmitt MJ;Shanks RM

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生物膜相关感染是人类疾病的主要原因,表面附着和生物膜形成的能力是微生物致病的关键属性。粘质沙雷氏菌依赖I型菌毛的生物膜由腺苷环化酶(CyaA)和环状3‘,5’-腺苷一磷酸(CAMP)-cAMP受体蛋白(CRP)复合体协调。本研究以粘质链霉菌为模型系统,研究cAMP-磷酸二酯酶活性在控制生物膜形成中的作用。在这里,我们描述了一个可能的粘质链球菌cAMP-磷酸二酯酶基因(SMA3506)的特征,命名为CPDS,并在体外和体内证明是一个功能性的cAMP-磷酸二酯酶。CPDS的缺失导致有缺陷的生物膜形成和I型菌毛产量减少,而CPDS的多拷贝表达导致I型菌毛依赖的超生物膜。总之,这些结果支持细菌cAMP-磷酸二酯酶活性调节生物膜形成的模型。
Biofilm-related infections are a major contributor to human disease, and the capacity for surface attachment and biofilm formation are key attributes for the pathogenesis of microbes. Serratia marcescens type I fimbriae-dependent biofilms are coordinated by the adenylate cyclase, CyaA, and the cyclic 3′,5′-adenosine monophosphate (cAMP)-cAMP receptor protein (CRP) complex. This study uses S. marcescens as a model system to test the role of cAMP-phosphodiesterase activity in controlling biofilm formation. Herein we describe the characterization of a putative S. marcescens cAMP-phosphodiesterase gene (SMA3506), designated as cpdS, and demonstrated to be a functional cAMP-phosphodiesterase both in vitro and in vivo. Deletion of cpdS resulted in defective biofilm formation and reduced type I fimbriae production, whereas multicopy expression of cpdS conferred a type I fimbriae-dependent hyper-biofilm. Together, these results support a model in which bacterial cAMP-phosphodiesterase activity modulates biofilm formation.
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