Protein Information

ID 3443
Name glycolytic enzyme
Synonyms Brain form hexokinase; HK1; Glycolytic enzyme; HK I; HK1 sa; HK1 sb; HK1 ta; HK1 tb…

Compound Information

ID 955
Name TCA
CAS 2,2,2-trichloroacetic acid

Reference

PubMed Abstract RScore(About this table)
16428761 Tchawa Yimga M, Leatham MP, Allen JH, Laux DC, Conway T, Cohen PS: Role of gluconeogenesis and the tricarboxylic acid cycle in the virulence of Salmonella enterica serovar Typhimurium in BALB/c mice. Infect Immun. 2006 Feb;74(2):1130-40.
In Salmonella enterica serovar Typhimurium, the Cra protein (catabolite repressor/activator) regulates utilization of gluconeogenic carbon sources by activating transcription of genes in the gluconeogenic pathway, the glyoxylate bypass, the tricarboxylic acid (TCA) cycle, and electron transport and repressing genes encoding glycolytic enzymes. A serovar Typhimurium SR-11 Deltacra mutant was recently reported to be avirulent in BALB/c mice via the peroral route, suggesting that gluconeogenesis may be required for virulence. In the present study, specific SR-11 genes in the gluconeogenic pathway were deleted (fbp, glpX, ppsA, and pckA), and the mutants were tested for virulence in BALB/c mice. The data show that SR-11 does not require gluconeogenesis to retain full virulence and suggest that as yet unidentified sugars are utilized by SR-11 for growth during infection of BALB/c mice. The data also suggest that the TCA cycle operates as a full cycle, i.e., a sucCD mutant, which prevents the conversion of succinyl coenzyme A to succinate, and an DeltasdhCDA mutant, which blocks the conversion of succinate to fumarate, were both attenuated, whereas both an SR-11 DeltaaspA mutant and an SR-11 DeltafrdABC mutant, deficient in the ability to run the reductive branch of the TCA cycle, were fully virulent. Moreover, although it appears that SR-11 replenishes TCA cycle intermediates from substrates present in mouse tissues, fatty acid degradation and the glyoxylate bypass are not required, since an SR-11 DeltafadD mutant and an SR-11 DeltaaceA mutant were both fully virulent.
1(0,0,0,1)