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Updated: Jan 24, 2026

Capsular Serotyping of Streptococcus pneumoniae by Latex Agglutination
Published on: September 25, 2014
Exploring the competence stimulating peptide (CSP) N-terminal requirements for effective ComD receptor activation in
1Department of Chemistry, University of Nevada, Reno, 1664 North Virginia Street, Reno, Nevada 89557, United States.
Abstract:
The competence stimulating peptide (CSP) plays a key role in the regulation of pneumococcal quorum sensing (QS), a communication system that is critical to the infectivity of pneumococci. CSP functions through binding and activating a transmembrane receptor, ComD. Molecules that can modulate pneumococcal QS through intercepting CSP:ComD interaction may serve as new generation of antibacterial agents to treat pneumococcal infections. In this work, we systematically modified the N-terminus of CSP1, a region that is essential to ComD activation, to identify detailed structural features of the N-terminus that are responsible for its function. Our results revealed structural features that are optimal to achieve receptor activation and structure-activity trends that improve our understanding of CSP:ComD interaction, all of which will contribute to the design of novel pneumococcal QS modulators with higher potency and improved pharmacological properties.
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