Genes required for mycobacterial growth defined by high density mutagenesis
TLDR
The use of transposon site hybridization (TraSH) is described to comprehensively identify the genes required by the causative agent, Mycobacterium tuberculosis, for optimal growth, suggesting that the minimal gene set required for survival varies greatly between organisms with different evolutionary histories.Abstract:
Despite over a century of research, tuberculosis remains a leading cause of infectious death worldwide. Faced with increasing rates of drug resistance, the identification of genes that are required for the growth of this organism should provide new targets for the design of antimycobacterial agents. Here, we describe the use of transposon site hybridization (TraSH) to comprehensively identify the genes required by the causative agent, Mycobacterium tuberculosis, for optimal growth. These genes include those that can be assigned to essential pathways as well as many of unknown function. The genes important for the growth of M. tuberculosis are largely conserved in the degenerate genome of the leprosy bacillus, Mycobacterium leprae, indicating that non-essential functions have been selectively lost since this bacterium diverged from other mycobacteria. In contrast, a surprisingly high proportion of these genes lack identifiable orthologues in other bacteria, suggesting that the minimal gene set required for survival varies greatly between organisms with different evolutionary histories.read more
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References
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Deciphering the biology of Mycobacterium tuberculosis from the complete genome sequence
Stewart T. Cole,Roland Brosch,Julian Parkhill,Thierry Garnier,Carol Churcher,David Harris,Stephen V. Gordon,Karin Eiglmeier,S. Gas,Clifton E. Barry,Fredj Tekaia,K. Badcock,D. Basham,D. Brown,Tracey Chillingworth,R. Connor,Robert L. Davies,K. Devlin,Theresa Feltwell,S. Gentles,N. Hamlin,S. Holroyd,T. Hornsby,Kay Jagels,Anders Krogh,J. McLean,Sharon Moule,Lee Murphy,K. Oliver,J. Osborne,Michael A. Quail,Marie-Adèle Rajandream,Jane Rogers,S. Rutter,K. Seeger,Jason Skelton,Rob Squares,S. Squares,John Sulston,K. Taylor,Sally Whitehead,Bart Barrell +41 more
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Clyde A. Hutchison,Scott N. Peterson,Steven R. Gill,Robin T. Cline,Owen White,Claire M. Fraser,Hamilton O. Smith,J. Craig Venter +7 more
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Journal ArticleDOI
Comprehensive identification of conditionally essential genes in mycobacteria
TL;DR: A technique, transposon site hybridization (TraSH), which allows rapid functional characterization by identifying the complete set of genes required for growth under different conditions by combining high-density insertional mutagenesis with microarray mapping of pools of mutants.
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