Abstract
Maintenance of the structural macromolecule peptidoglycan (PG), which involves regulated cycles of PG synthesis and PG degradation, is pivotal for cellular integrity and survival. PG fragments generated from the degradation process are usually efficiently recycled by Gram-negative bacteria. However, Neisseria gonorrhoeae and a limited number of Gram-negative bacteria release PG fragments in amounts sufficient to induce host tissue inflammation and damage during an infection. Due to limited redundancy in PG-modifying machineries and genetic tractability, N. gonorrhoeae serves as a great model organism for the study of biological processes related to PG. This review summarizes the generation, modification, and release of inflammatory PG molecules by N. gonorrhoeae and related species and discusses these findings in the context of understanding bacterial physiology and pathogenesis.
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