Global regulation of gene expression in Escherichia coli.
Global transcription responses of Escherichia coli to various stimuli or genetic defects were studied by measuring mRNA levels in about 400 segments of the genome. Measuring mRNA levels was done by analyzing hybridization to DNA dot blots made with overlapping lambda clones spanning the genome of E. coli K-12. Conditions examined included isopropyl-beta-D-thiogalactopyranoside (IPTG) induction, heat shock, osmotic shock, starvation for various nutrients, entrance of cells into the stationary phase of growth, anaerobic growth in a tube, growth in the gnotobiotic mouse gut, and effects of pleiotropic mutations rpoH, himA, topA, and crp. Most mapped genes known to be regulated by a particular situation were successfully detected. In addition, many chromosomal regions containing no previously known regulated genes were discovered that responded to various stimuli. This new method for studying globally regulated genetic systems in E. coli combines detection, cloning, and physical mapping of a battery of coregulated genes in one step.
Chuang
S E
SE
Laboratory of Genetics, University of Wisconsin-Madison 53706.
Daniels
D L
DL
Blattner
F R
FR
D000222:Adaptation, Physiological / Q000235:genetics*; D000693:Anaerobiosis; D000818:Animals; D010582:Bacteriophage lambda / Q000235:genetics; D015152:Blotting, Northern; D002455:Cell Division; D002874:Chromosome Mapping; D003001:Cloning, Molecular; D004064:Digestive System / Q000382:microbiology; D004926:Escherichia coli / Q000187:drug effects / Q000235:genetics*; D015964:Gene Expression Regulation, Bacterial; D015723:Gene Library; D005856:Germ-Free Life; D005947:Glucose / Q000172:deficiency; D006360:Heat-Shock Proteins / Q000235:genetics; D006358:Hot Temperature; D007544:Isopropyl Thiogalactoside / Q000494:pharmacology; D051379:Mice / Q000382:microbiology; D008967:Molecular Biology / Q000379:methods*; D009994:Osmolar Concentration; D010710:Phosphates / Q000172:deficiency; D000644:Quaternary Ammonium Compounds / Q000494:pharmacology; D012333:RNA, Messenger / Q000032:analysis; D012808:Sigma Factor / Q000235:genetics; D014157:Transcription Factors; D014158:Transcription, Genetic
D006360:Heat-Shock Proteins; D010710:Phosphates; D000644:Quaternary Ammonium Compounds; D012333:RNA, Messenger; D012808:Sigma Factor; D014157:Transcription Factors; C069774:heat-shock sigma factor 32; D007544:Isopropyl Thiogalactoside; D005947:Glucose