The hrcA and hspR regulons of Campylobacter jejuni

CW Holmes, Charles Penn, Peter Lund

Research output: Contribution to journalArticle

19 Citations (Scopus)


The human pathogen Campylobacter jejuni has a classic heat shock response, showing induction of chaperones and proteases plus several unidentified proteins in response to a small increase in growth temperature. The genome contains two homologues to known heat shock response regulators, HrcA and HspR. Previous work has shown that HspR controls several heat-shock genes, but the hrcA regulon has not been defined. We have constructed single and double deletions of C. jejuni hrcA and hspR and analysed gene expression using microarrays. Only a small number of genes are controlled by these two regulators, and the two regulons overlap. Strains mutated in hspR, but not those mutated in hrcA, showed enhanced thermotolerance. Some genes previously identified as being downregulated in a strain lacking hspR showed no change in expression in our experiments.
Original languageEnglish
Pages (from-to)158-166
Number of pages9
Issue number1
Publication statusPublished - 1 Jan 2010


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