Invariability of central metabolic flux distribution in Shewanella oneidensis MR-1 under environmental or genetic perturbations.
An environmentally important bacterium with versatile respiration, Shewanella oneidensis MR-1, displayed significantly different growth rates under three culture conditions: minimal medium (doubling time approximately 3 h), salt stressed minimal medium (doubling time approximately 6 h), and minimal medium with amino acid supplementation (doubling time approximately 1.5 h). (13)C-based metabolic flux analysis indicated that fluxes of central metabolic reactions remained relatively constant under the three growth conditions, which is in stark contrast to the reported significant changes in the transcript and metabolite profiles under various growth conditions. Furthermore, 10 transposon mutants of S. oneidensis MR-1 were randomly chosen from a transposon library and their flux distributions through central metabolic pathways were revealed to be identical, even though such mutational processes altered the secondary metabolism, for example, glycine and C1 (5,10-Me-THF) metabolism.
Tang
Yinjie J
YJ
Dept. of Energy, Washington University, St. Louis, MO 63130, USA.
Martin
Hector Garcia
HG
Deutschbauer
Adam
A
Feng
Xueyang
X
Huang
Rick
R
Llora
Xavier
X
Arkin
Adam
A
Keasling
Jay D
JD
D003470:Culture Media / Q000737:chemistry / Q000378:metabolism; D004251:DNA Transposable Elements; D008401:Gas Chromatography-Mass Spectrometry; D019344:Lactic Acid / Q000378:metabolism; D053858:Metabolic Networks and Pathways / Q000502:physiology; D055442:Metabolome / Q000502:physiology*; D009010:Monte Carlo Method; D016296:Mutagenesis; D009154:Mutation; D020592:Shewanella / Q000235:genetics / Q000502:physiology*; D012965:Sodium Chloride; D013312:Stress, Physiological / Q000502:physiology*; D049490:Systems Biology / Q000379:methods*
D003470:Culture Media; D004251:DNA Transposable Elements; D019344:Lactic Acid; D012965:Sodium Chloride