Mapping and manipulating the Mycobacterium tuberculosis transcriptome using a transcription factor overexpression-derived regulatory network.

Publication Type:

Journal Article

Authors:

Rustad, Tige R; Minch, Kyle J; Ma, Shuyi; Winkler, Jessica K; Hobbs, Samuel; Hickey, Mark; Brabant, William; Turkarslan, Serdar; Price, Nathan D; Baliga, Nitin S; Sherman, David R

Source:

Genome Biol, Volume 15, Issue 11, p.502 (2014)

Keywords:

Cloning, Molecular, Gene Expression Regulation, Bacterial, Gene Regulatory Networks, Humans, Isoniazid, Mycobacterium tuberculosis, Promoter Regions, Genetic, Regulon, Transcription Factors, Transcription, Genetic, Transcriptome, Tuberculosis

Abstract:

BACKGROUND: Mycobacterium tuberculosis senses and responds to the shifting and hostile landscape of the host. To characterize the underlying intertwined gene regulatory network governed by approximately 200 transcription factors of M. tuberculosis, we have assayed the global transcriptional consequences of overexpressing each transcription factor from an inducible promoter.RESULTS: We cloned and overexpressed 206 transcription factors in M. tuberculosis to identify the regulatory signature of each. We identified 9,335 regulatory consequences of overexpressing each of 183 transcription factors, providing evidence of regulation for 70% of the M. tuberculosis genome. These transcriptional signatures agree well with previously described M. tuberculosis regulons. The number of genes differentially regulated by transcription factor overexpression varied from hundreds of genes to none, with the majority of expression changes repressing basal transcription. Exploring the global transcriptional maps of transcription factor overexpressing (TFOE) strains, we predicted and validated the phenotype of a regulator that reduces susceptibility to a first line anti-tubercular drug, isoniazid. We also combined the TFOE data with an existing model of M. tuberculosis metabolism to predict the growth rates of individual TFOE strains with high fidelity.CONCLUSION: This work has led to a systems-level framework describing the transcriptome of a devastating bacterial pathogen, characterized the transcriptional influence of nearly all individual transcription factors in M. tuberculosis, and demonstrated the utility of this resource. These results will stimulate additional systems-level and hypothesis-driven efforts to understand M. tuberculosis adaptations that promote disease.

Supplementary Files:

Attachment	Size
Supplementary Excel Files for Rustad et al. 2014	19.36 MB
TFOE Searchable Excel File	20.15 MB

Title	Gene	BioProject	GEO Series	Platform	Accession	Sample Method	Sample Type	References	Release Date	Repository
TFOE_6565_1846c	Rv1846c Transcriptional regulator, BlaI family	PRJNA254351	GSE59086	GPL14824	GSM1426737	Tiling Array	RNA	25232098	4-Jul-14	GEO
TFOE_1378_1909c	Rv1909c Transcriptional regulator, FUR family	PRJNA254351	GSE59086	GPL14824	GSM1426738	Tiling Array	RNA	25232098	4-Jul-14	GEO
TFOE_9132_1816	Rv1816 Transcriptional regulator, TetR family	PRJNA254351	GSE59086	GPL14824	GSM1426728	Tiling Array	RNA	25232098	4-Jul-14	GEO
TFOE_8915_1816	Rv1816 Transcriptional regulator, TetR family	PRJNA254351	GSE59086	GPL14824	GSM1426727	Tiling Array	RNA	25232098	4-Jul-14	GEO
TFOE_6347_1816	Rv1816 Transcriptional regulator, TetR family	PRJNA254351	GSE59086	GPL14824	GSM1426726	Tiling Array	RNA	25232098	4-Jul-14	GEO
TFOE_7465_1725c	Rv1725c Transcriptional regulator, HxlR family	PRJNA254351	GSE59086	GPL14824	GSM1426716	Tiling Array	RNA	25232098	4-Jul-14	GEO
TFOE_2509_1740	Rv1740	PRJNA254351	GSE59086	GPL14824	GSM1426717	Tiling Array	RNA	25232098	4-Jul-14	GEO
TFOE_5284_1740	Rv1740	PRJNA254351	GSE59086	GPL14824	GSM1426718	Tiling Array	RNA	25232098	4-Jul-14	GEO
TFOE_9311_1740	Rv1740	PRJNA254351	GSE59086	GPL14824	GSM1426719	Tiling Array	RNA	25232098	4-Jul-14	GEO
TFOE_3531_1773c	Rv1773c Transcriptional regulator, IclR family	PRJNA254351	GSE59086	GPL14824	GSM1426720	Tiling Array	RNA	25232098	4-Jul-14	GEO