Genome-wide binding of TbsP (HVO_2861) in Haloferax volcanii [CHIP-seq]

The hypersaline-adapted archaeon Haloferax volcanii exhibits remarkable plasticity in its morphology, biofilm formation, and motility in response to variations in nutrients and cell density. The transcriptional regulator TrmB maintains the rod shape in the related species Halobacterium salinarum by activating the expression genes involved in gluconeogenesis. Here we investigated the role of TrmB in Hfx. volcanii. The ?trmB strain rapidly accumulated suppressor mutations in a gene encoding a novel transcriptional regulator, which we name TrmB suppressor, or TbsP. TbsP is required for adhesion to abiotic surfaces and maintains wild-type cell morphology and motility. We identified TbsP binding sites in the presence and absence of glucose to better understand the role of TbsP. TbsP does not bind DNA in response to glucose availability. The sole binding site near a metabolic enzyme-coding gene is upstream of gapII. Overall design: Chromatin immunoprecipitation DNA-sequencing (ChIP-seq) of TbsP in the halophilic archaeon Haloferax volcanii in the presence and absense of glucose.