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cadB | Putative lysine/cadaverine transporter; Probable cadaverine/lysine antiporter or part of it. (444 aa) | ||||
adiC | Arginine:agmatine antiporter; Major component of the acid-resistance (AR) system allowing enteric pathogens to survive the acidic environment in the stomach (By similarity). Exchanges extracellular arginine for its intracellular decarboxylation product agmatine (Agm) thereby expelling intracellular protons. (445 aa) | ||||
aceA | Isocitrate lyase; Involved in the metabolic adaptation in response to environmental changes. Catalyzes the reversible formation of succinate and glyoxylate from isocitrate, a key step of the glyoxylate cycle, which operates as an anaplerotic route for replenishing the tricarboxylic acid cycle during growth on fatty acid substrates. (434 aa) | ||||
aceB | Malate synthase A; Protein involved in glyoxylate cycle. (533 aa) | ||||
sthA | Pyridine nucleotide transhydrogenase, soluble; Conversion of NADPH, generated by peripheral catabolic pathways, to NADH, which can enter the respiratory chain for energy generation. (466 aa) | ||||
gadA | Glutamate decarboxylase A, PLP-dependent; Converts glutamate to gamma-aminobutyrate (GABA), consuming one intracellular proton in the reaction. The gad system helps to maintain a near-neutral intracellular pH when cells are exposed to extremely acidic conditions. The ability to survive transit through the acidic conditions of the stomach is essential for successful colonization of the mammalian host by commensal and pathogenic bacteria. (466 aa) | ||||
gadX | Acid resistance regulon transcriptional activator; Positively regulates the expression of about fifteen genes involved in acid resistance such as gadA, gadB and gadC. Depending on the conditions (growth phase and medium), can repress gadW. (274 aa) | ||||
gadW | Transcriptional activator of gadA and gadBC; Depending on the conditions (growth phase and medium), acts as a positive or negative regulator of gadA and gadBC. Repression occurs directly or via the repression of the expression of gadX. Activation occurs directly by the binding of GadW to the gadA and gadBC promoters. (242 aa) | ||||
hdeB | Acid-resistance protein; Required for optimal acid stress protection, which is important for survival of enteric bacteria in the acidic environment of the host stomach. Exhibits a chaperone-like activity at acidic pH by preventing the aggregation of many different periplasmic proteins. (108 aa) | ||||
prpC | 2-methylcitrate synthase; Involved in the catabolism of short chain fatty acids (SCFA) via the tricarboxylic acid (TCA)(acetyl degradation route) and via the 2-methylcitrate cycle I (propionate degradation route). Catalyzes the Claisen condensation of propionyl-CoA and oxaloacetate (OAA) to yield 2-methylcitrate (2-MC) and CoA. Also catalyzes the condensation of oxaloacetate with acetyl-CoA to yield citrate but with a lower specificity. (389 aa) | ||||
allA | Ureidoglycolate lyase, releasing urea; Catalyzes the catabolism of the allantoin degradation intermediate (S)-ureidoglycolate, generating urea and glyoxylate. Involved in the anaerobic utilization of allantoin as sole nitrogen source. Reinforces the induction of genes involved in the degradation of allantoin and glyoxylate by producing glyoxylate. (160 aa) | ||||
gcl | Glyoxylate carboligase; Catalyzes the condensation of two molecules of glyoxylate to give 2-hydroxy-3-oxopropanoate (also termed tartronate semialdehyde). (593 aa) | ||||
hyi | Hydroxypyruvate isomerase; Catalyzes the reversible isomerization between hydroxypyruvate and 2-hydroxy-3-oxopropanoate (also termed tartronate semialdehyde). Does not catalyze the isomerization of D-fructose to D- glucose or that of D-xylulose to D-xylose. Also does not catalyze racemization of serine, alanine, glycerate or lactate. (258 aa) | ||||
glxR | Tartronate semialdehyde reductase, NADH-dependent; Protein involved in carbohydrate catabolic process, glycolate metabolic process and allantoin assimilation pathway; Belongs to the HIBADH-related family. (292 aa) | ||||
allB | Allantoinase; Catalyzes the conversion of allantoin (5-ureidohydantoin) to allantoic acid by hydrolytic cleavage of the five-member hydantoin ring; Belongs to the metallo-dependent hydrolases superfamily. Allantoinase family. (453 aa) | ||||
allC | Allantoate amidohydrolase; Involved in the anaerobic nitrogen utilization via the assimilation of allantoin. Catalyzes specifically the hydrolysis of allantoate to yield CO2, NH3 and S- ureidoglycine, which is unstable and readily undergoes a second deamination by S-ureidoglycine aminohydrolase AllE to yield S- ureidoglycolate and NH3. In vivo, the spontaneous release of S-ureidoglycolate and ammonia from S-ureidoglycine appears to be too slow to sustain an efficient flux of nitrogen. (411 aa) | ||||
crp | cAMP-activated global transcription factor, mediator of catabolite repression; A global transcription regulator. Complexes with cyclic AMP (cAMP) which allosterically activates DNA binding (to consensus sequence 5'-AAATGTGATCTAGATCACATTT-3') to directly regulate the transcription of about 300 genes in about 200 operons and indirectly regulate the expression of about half the genome. There are 3 classes of CRP promoters; class I promoters have a single CRP-binding site upstream of the RNA polymerase (RNAP)-binding site, whereas in class II promoters the single CRP- and RNAP-binding site [...] (210 aa) | ||||
sspA | Stringent starvation protein A; Forms an equimolar complex with the RNA polymerase holoenzyme (RNAP) but not with the core enzyme. It is synthesized predominantly when cells are exposed to amino acid starvation, at which time it accounts for over 50% of the total protein synthesized. It is involved in the transition from P1 early to P1 late gene expression. Rnk and SspA can functionally replace P.aeruginosa alginate regulatory gene algR2. (212 aa) | ||||
garR | Tartronate semialdehyde reductase; Catalyzes the reduction of tatronate semialdehyde to D- glycerate. (294 aa) | ||||
glnE | Fused deadenylyltransferase/adenylyltransferase for glutamine synthetase; Involved in the regulation of glutamine synthetase GlnA, a key enzyme in the process to assimilate ammonia. When cellular nitrogen levels are high, the C-terminal adenylyl transferase inactivates GlnA by covalent transfer of an adenylyl group from ATP to 'Tyr-398' of GlnA, thus reducing its activity. Conversely, when nitrogen levels are low, the N- terminal adenylyl removase (AR) activates GlnA by removing the adenylyl group by phosphorolysis, increasing its activity. The regulatory region of GlnE binds the signa [...] (946 aa) | ||||
glcB | Malate synthase G; Involved in the glycolate utilization. Catalyzes the condensation and subsequent hydrolysis of acetyl-coenzyme A (acetyl- CoA) and glyoxylate to form malate and CoA. (723 aa) | ||||
rpoS | RNA polymerase, sigma S (sigma 38) factor; Sigma factors are initiation factors that promote the attachment of RNA polymerase to specific initiation sites and are then released. This sigma factor is the master transcriptional regulator of the stationary phase and the general stress response. Controls, positively or negatively, the expression of several hundred genes, which are mainly involved in metabolism, transport, regulation and stress management. (330 aa) | ||||
evgS | Hybrid sensory histidine kinase in two-component regulatory system with EvgA; Member of the two-component regulatory system EvgS/EvgA. Phosphorylates EvgA via a four-step phosphorelay in response to environmental signals. (1197 aa) | ||||
evgA | Response regulator in two-component regulatory system with EvgS; Member of the two-component regulatory system EvgS/EvgA. Regulates the expression of emrKY operon and yfdX. Seems also to control expression of at least one other multidrug efflux operon. (204 aa) | ||||
ydeO | UV-inducible global regulator, EvgA-, GadE-dependent; Induces the expression of gadE and mdtEF. Could also regulate the expression of other genes involved in acid resistance. (253 aa) | ||||
gadB | Glutamate decarboxylase B, PLP-dependent; Converts glutamate to gamma-aminobutyrate (GABA), consuming one intracellular proton in the reaction. The gad system helps to maintain a near-neutral intracellular pH when cells are exposed to extremely acidic conditions. The ability to survive transit through the acidic conditions of the stomach is essential for successful colonization of the mammalian host by commensal and pathogenic bacteria; Belongs to the group II decarboxylase family. (466 aa) | ||||
gadC | Glutamate:gamma-aminobutyric acid antiporter; Involved in glutamate-dependent acid resistance. Imports glutamate inside the cell while simultaneously exporting to the periplasm the GABA produced by GadA and GadB. The gad system helps to maintain a near-neutral intracellular pH when cells are exposed to extremely acidic conditions. The ability to survive transit through the acidic conditions of the stomach is essential for successful colonization of the mammalian host by commensal and pathogenic bacteria; Belongs to the amino acid-polyamine-organocation (APC) superfamily. Glutamate:GABA [...] (511 aa) | ||||
cysB | N-acetylserine-responsive cysteine regulon transcriptional activator; This protein is a positive regulator of gene expression for the cysteine regulon, a system of 10 or more loci involved in the biosynthesis of L-cysteine from inorganic sulfate. The inducer for CysB is N-acetylserine. CysB inhibits its own transcription. (324 aa) | ||||
icd | Isocitrate dehydrogenase, specific for NADP+; Protein involved in tricarboxylic acid cycle and anaerobic respiration; Belongs to the isocitrate and isopropylmalate dehydrogenases family. (416 aa) | ||||
ndh | Respiratory NADH dehydrogenase 2/cupric reductase; Transfer of electrons from NADH to the respiratory chain. The immediate electron acceptor for the enzyme is believed to be ubiquinone. Does not couple the redox reaction to proton translocation. (434 aa) | ||||
gltA | Citrate synthase; Protein involved in tricarboxylic acid cycle and anaerobic respiration; Belongs to the citrate synthase family. (427 aa) | ||||
gadE | Gad regulon transcriptional activator; Regulates the expression of several genes involved in acid resistance. Required for the expression of gadA and gadBC, among others, regardless of media or growth conditions. Binds directly to the 20 bp GAD box found in the control regions of both loci. (175 aa) | ||||
hdeA | Stress response protein acid-resistance protein; Required for optimal acid stress protection. Exhibits a chaperone-like activity only at pH below 3 by suppressing non- specifically the aggregation of denaturated periplasmic proteins. Important for survival of enteric bacteria in the acidic environment of the host stomach. Also promotes the solubilization at neutral pH of proteins that had aggregated in their presence at acidic pHs. May cooperate with other periplasmic chaperones such as DegP and SurA. (110 aa) |