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Título: | Insights into pneumococcal pathogenesis from the crystal structure of the modular teichoic acid phosphorylcholine esterase Pce |
Autor: | Hermoso, Juan A. CSIC ORCID; Lagartera, Laura CSIC ORCID; González, Ana CSIC; Stelter, Meike; García, Pedro CSIC ORCID ; Martínez-Ripoll, Martín CSIC ORCID; García, José Luis CSIC ORCID ; Menéndez, Margarita CSIC ORCID | Fecha de publicación: | 2005 | Editor: | Nature Publishing Group | Citación: | Nature Structural and Molecular Biology 12(6): 533-538(2005) | Resumen: | Phosphorylcholine, a specific component of the pneumococcal cell wall, is crucial in pathogenesis. It directly binds to the human platelet-activating factor (PAF) receptor and acts as a docking station for the family of surface-located choline-binding proteins (CBP). The first structure of a complete pneumococcal CBP, Pce (or CbpE), has been solved in complex with the reaction product and choline analogs. Pce has a novel modular structure, with a globular N-terminal module containing a binuclear Zn2+ catalytic center, and an elongated choline-binding module. Residues involved in substrate binding and catalysis are described and modular configuration of the active center accounts for in vivo features of teichoic acid hydrolysis. The hydrolysis of PAF by Pce and its regulatory role in phosphorylcholine decoration of the bacterial surface provide new insights into the critical function of Pce in pneumococcal adherence and invasiveness. © 2005 Nature Publishing Group. | URI: | http://hdl.handle.net/10261/74551 | DOI: | 10.1038/nsmb940 | Identificadores: | doi: 10.1038/nsmb940 issn: 1545-9993 e-issn: 1545-9985 |
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