N. Luisa Hiller and colleagues focus on Streptococcus pneumoniae (pneumococcus) and contribute to the knowledge of peptide-communication signals in pneumococcus. Hiller et. al determine that a regulator-peptide signal transduction system, TprA2/PhrA2, was acquired by a PMEN1 ancestor and is encoded by the vast majority of strains in this lineage.
Image credit: Kadam A, et al. (2017)