Substrates: the protein coded by STM2360 has a catalytic activity as a D-ornithine/D-lysine decarboxylase (DOKDC), it is specific for D-amino acids. The reaction products, cadaverine and putrescine, respectively, are identified by NMR and mass spectrometry. The substrate specificity of enzyme DOKDC is D-lysine before D-ornithine. STM2358, located in the same operon, has ornithine racemase activity. Phenol red assay Products: -
Substrates: the protein coded by STM2360 has a catalytic activity as a D-ornithine/D-lysine decarboxylase (DOKDC), it is specific for D-amino acids. The reaction products, cadaverine and putrescine, respectively, are identified by NMR and mass spectrometry. The substrate specificity of enzyme DOKDC is D-lysine before D-ornithine. STM2358, located in the same operon, has ornithine racemase activity. Phenol red assay Products: -
Substrates: enzyme product identification by NMR and mass spectrometry. The D-lysine substrate is preferred over D-ornithine. pH-Indicator-based enzyme assay. No activity with D-arginine, L-arginine, L-lysine, or L-ornithine, and no activity with DL-2,4-diaminopropionic acid, D-methionine, D-leucine, D-glutamine, D-asparagine, D-phenylalanine, and D-valine. Transamination or decarboxylation-dependent transamination occurs with D-arginine to form pyridoxamine-5'-phosphate and inactive enzyme Products: -
Substrates: enzyme product identification by NMR and mass spectrometry. The D-lysine substrate is preferred over D-ornithine. pH-Indicator-based enzyme assay. No activity with D-arginine, L-arginine, L-lysine, or L-ornithine, and no activity with DL-2,4-diaminopropionic acid, D-methionine, D-leucine, D-glutamine, D-asparagine, D-phenylalanine, and D-valine. Transamination or decarboxylation-dependent transamination occurs with D-arginine to form pyridoxamine-5'-phosphate and inactive enzyme Products: -
Substrates: the protein coded by STM2360 has a catalytic activity as a D-ornithine/D-lysine decarboxylase (DOKDC), it is specific for D-amino acids. The reaction products, cadaverine and putrescine, respectively, are identified by NMR and mass spectrometry. The substrate specificity of enzyme DOKDC is D-lysine before D-ornithine. STM2358, located in the same operon, has ornithine racemase activity. Phenol red assay Products: -
Substrates: enzyme product identification by NMR and mass spectrometry. The D-lysine substrate is preferred over D-ornithine. pH-Indicator-based enzyme assay. No activity with D-arginine, L-arginine, L-lysine, or L-ornithine, and no activity with DL-2,4-diaminopropionic acid, D-methionine, D-leucine, D-glutamine, D-asparagine, D-phenylalanine, and D-valine. Transamination or decarboxylation-dependent transamination occurs with D-arginine to form pyridoxamine-5'-phosphate and inactive enzyme Products: -
Substrates: the protein coded by STM2360 has a catalytic activity as a D-ornithine/D-lysine decarboxylase (DOKDC), it is specific for D-amino acids. The reaction products, cadaverine and putrescine, respectively, are identified by NMR and mass spectrometry. The substrate specificity of enzyme DOKDC is D-lysine before D-ornithine. STM2358, located in the same operon, has ornithine racemase activity. Phenol red assay Products: -
Substrates: enzyme product identification by NMR and mass spectrometry. The D-lysine substrate is preferred over D-ornithine. pH-Indicator-based enzyme assay. No activity with D-arginine, L-arginine, L-lysine, or L-ornithine, and no activity with DL-2,4-diaminopropionic acid, D-methionine, D-leucine, D-glutamine, D-asparagine, D-phenylalanine, and D-valine. Transamination or decarboxylation-dependent transamination occurs with D-arginine to form pyridoxamine-5'-phosphate and inactive enzyme Products: -
kinetics for both D-lysine and D-ornithine are distinctly sigmoid, strong cooperative behaviour suggesting that there may be an allosteric site for effectors and/or oligomeric equilibria which affect activity, kinetic analysis, overview
kinetics for both D-lysine and D-ornithine are distinctly sigmoid, strong cooperative behaviour suggesting that there may be an allosteric site for effectors and/or oligomeric equilibria which affect activity, kinetic analysis, overview
the amino acid sequence of STM2360 shows significant similarity (about 30% identity) to diaminopimelate decarboxylase (DapDC), a fold III pyridoxal 5'-phosphate (PLP) dependent enzyme involved in L-lysine biosynthesis. Homologues of STM2360 with high sequence identity (over 80%) are found in other common enterobacteria, including species of Klebsiella, Citrobacter, Vibrio, and Hafnia, as well as Clostridium in the Firmicutes, and Pseudomonas
the amino acid sequence of STM2360 shows significant similarity (about 30% identity) to diaminopimelate decarboxylase (DapDC, EC 4.1.1.20), a fold III pyridoxal-5'-phosphate (PLP) dependent enzyme involved in L-lysine biosynthesis. STM2358, located in the same operon, has ornithine racemase activity. This suggests that the physiological substrate of the decarboxylase and the operon is ornithine. STM2360 is annotated as encoding a second DapDC in Salmonella typhimurium LT2, although it is unable to complement lysine auxotrophy in a lysA mutant
the amino acid sequence of STM2360 shows significant similarity (about 30% identity) to diaminopimelate decarboxylase (DapDC), a fold III pyridoxal 5'-phosphate (PLP) dependent enzyme involved in L-lysine biosynthesis. Homologues of STM2360 with high sequence identity (over 80%) are found in other common enterobacteria, including species of Klebsiella, Citrobacter, Vibrio, and Hafnia, as well as Clostridium in the Firmicutes, and Pseudomonas
the amino acid sequence of STM2360 shows significant similarity (about 30% identity) to diaminopimelate decarboxylase (DapDC, EC 4.1.1.20), a fold III pyridoxal-5'-phosphate (PLP) dependent enzyme involved in L-lysine biosynthesis. STM2358, located in the same operon, has ornithine racemase activity. This suggests that the physiological substrate of the decarboxylase and the operon is ornithine. STM2360 is annotated as encoding a second DapDC in Salmonella typhimurium LT2, although it is unable to complement lysine auxotrophy in a lysA mutant
the amino acid sequence of STM2360 shows significant similarity (about 30% identity) to diaminopimelate decarboxylase (DapDC), a fold III pyridoxal 5'-phosphate (PLP) dependent enzyme involved in L-lysine biosynthesis. Homologues of STM2360 with high sequence identity (over 80%) are found in other common enterobacteria, including species of Klebsiella, Citrobacter, Vibrio, and Hafnia, as well as Clostridium in the Firmicutes, and Pseudomonas
the amino acid sequence of STM2360 shows significant similarity (about 30% identity) to diaminopimelate decarboxylase (DapDC, EC 4.1.1.20), a fold III pyridoxal-5'-phosphate (PLP) dependent enzyme involved in L-lysine biosynthesis. STM2358, located in the same operon, has ornithine racemase activity. This suggests that the physiological substrate of the decarboxylase and the operon is ornithine. STM2360 is annotated as encoding a second DapDC in Salmonella typhimurium LT2, although it is unable to complement lysine auxotrophy in a lysA mutant
enzyme catalyzes decarboxylation with inversion of stereochemistry. A concerted mechanism is supported by the lack of detectable exchange of the alpha-hydrogens of putrescine upon incubation with DOKDC in D2O
enzyme catalyzes decarboxylation with inversion of stereochemistry. A concerted mechanism is supported by the lack of detectable exchange of the alpha-hydrogens of putrescine upon incubation with DOKDC in D2O
the physiological substrate of the decarboxylase (and the operon) is ornithine. No role of DOKDC in relief of acid stress, but the enzyme enzyme plays an important role in microbial metabolism
the physiological substrate of the decarboxylase (and the operon) is ornithine. No role of DOKDC in relief of acid stress, but the enzyme enzyme plays an important role in microbial metabolism
the physiological substrate of the decarboxylase (and the operon) is ornithine. No role of DOKDC in relief of acid stress, but the enzyme enzyme plays an important role in microbial metabolism
structures of mutant Y430F bound to HEPES, putrescine, D-ornithine, D-lysine, and D-arginine. The D-amino acids bind in the crystals to form equilibrium mixtures of gem-diamine and external aldimine complexes. An allosteric product activator site for putrescine is located on the 2fold axis between the two active sites. Putrescine binds by donating hydrogen bonds from the ammonium groups to Asp-361 and Gln-358 in the specificity helix of both chains. Glu-181 can form additional hydrogen bonds with the bound putrescine
contratry to wild-type, mutant has measurable decarboxylase activity with both D- and L-lysine and ornithine. Addition of 0.1-1 mM putrescine eliminates the lag in steady state kinetics and abolishes the sigmoid kinetics
contratry to wild-type, mutant has measurable decarboxylase activity with both D- and L-lysine and ornithine. Addition of 0.1-1 mM putrescine eliminates the lag in steady state kinetics and abolishes the sigmoid kinetics
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CLONED (Commentary)
ORGANISM
UNIPROT
LITERATURE
gene STM2360, DNA and amino acid sequence determination and analysis, sequence comparisons, recombinant expression of His-tagged enzyme in Escherichia coli strain BL21(DE3), the enzyme is unable to complement lysine auxotrophy in a lysA mutant
gene STM2360, located in a small operon of undetermined function in Salmonella enterica serovar Typhimurium LT2, DNA and amino acid sequence determination and analysis, recombinant overexpression of C-terminally His-tagged enzyme in Escherichia coli strain BL21(DE3)
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EXPRESSION
ORGANISM
UNIPROT
LITERATURE
gene STM2361 is transcribed divergently from gene STM2360 and encodes a bEBP, which given its proximity, is likely responsible for activating transcription of the STM2360 operon. Transcription of STM2361 is induced 13fold by acid shock (exposure of the cells to pH 3 for 10 min) and 3fold by bile shock
gene STM2361 is transcribed divergently from gene STM2360 and encodes a bEBP, which given its proximity, is likely responsible for activating transcription of the STM2360 operon. Transcription of STM2361 is induced 13fold by acid shock (exposure of the cells to pH 3 for 10 min) and 3fold by bile shock
gene STM2361 is transcribed divergently from gene STM2360 and encodes a bEBP, which given its proximity, is likely responsible for activating transcription of the STM2360 operon. Transcription of STM2361 is induced 13fold by acid shock (exposure of the cells to pH 3 for 10 min) and 3fold by bile shock
gene STM2361 is transcribed divergently from gene STM2360 and encodes a bEBP, which given its proximity, is likely responsible for activating transcription of the STM2360 operon. Transcription of STM2361 is induced 13fold by acid shock (exposure of the cells to pH 3 for 10 min) and 3fold by bile shock
Crystal sructure of D-ornithine/D-lysine decarboxylase, a stereoinverting decarboxylase Implications for substrate specificity and stereospecificity of fold III decarboxylases