Toxins, Volume 16, Issue 1
2024 January - 61 articles
Cover Story: This study investigates the protective effect of the chaperonin TRiC/CCT inhibitor, HSF1A, against pertussis toxin (PT) produced by Bordetella pertussis, the causative agent of whooping cough. TRiC/CCT is a cytosolic protein-folding complex. Previous research highlighted its significance in the functionality of related bacterial toxins. Our study reveals a novel interaction between PTS1 and CCT5, a subunit of the TRiC/CCT chaperonin complex. HSF1A effectively reduces PTS1-mediated ADP-ribosylation of Gαi, the specific intracellular substrate of PT. HSF1A does not impact enzyme activity in vitro or PT cell binding but reduces cytosolic PTS1 levels. Accordingly, HSF1A mitigates adverse effects of PT on inhibitory GPCR/cAMP signaling, suggesting therapeutic potential for countering PT-mediated pathogenicity. View this paper - Issues are regarded as officially published after their release is announced to the table of contents alert mailing list .
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