Cloned (Comment) | Organism |
---|---|
gene lsrK, recombinant expression of C-terminally His6-tagged enzyme in Escherichia coli strain BL21 | Salmonella enterica |
Metals/Ions | Comment | Organism | Structure |
---|---|---|---|
Mg2+ | required | Salmonella enterica |
Natural Substrates | Organism | Comment (Nat. Sub.) | Natural Products | Comment (Nat. Pro.) | Rev. | Reac. |
---|---|---|---|---|---|---|
ATP + 4,5-dihydroxypentane-2,3-dione | Salmonella enterica | the kinase LsrK phosphorylates carbon-5 of the open form of the substrate, molecule (S)-4,5-dihydroxypentane-2,3-dione is the precursor of the signal molecule autoinducer-2 | ADP + 2-hydroxy-3,4-dioxopentyl phosphate | - |
? | |
ATP + 4,5-dihydroxypentane-2,3-dione | Salmonella enterica serovar Typhimurium | the kinase LsrK phosphorylates carbon-5 of the open form of the substrate, molecule (S)-4,5-dihydroxypentane-2,3-dione is the precursor of the signal molecule autoinducer-2 | ADP + 2-hydroxy-3,4-dioxopentyl phosphate | - |
? | |
ATP + autoinducer-2 | Salmonella enterica | - |
ADP + phosphorylated autoinducer-2 | - |
? | |
ATP + autoinducer-2 | Salmonella enterica serovar Typhimurium | - |
ADP + phosphorylated autoinducer-2 | - |
? |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
Salmonella enterica | - |
serovar Typhimurium, gene lsrK | - |
Purification (Comment) | Organism |
---|---|
recombinant His6-tagged enzyme from Escherichia coli strain BL21 to homogeneity by nickel affinity chromatography and gel filtration | Salmonella enterica |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
ATP + 4,5-dihydroxypentane-2,3-dione | the kinase LsrK phosphorylates carbon-5 of the open form of the substrate, molecule (S)-4,5-dihydroxypentane-2,3-dione is the precursor of the signal molecule autoinducer-2 | Salmonella enterica | ADP + 2-hydroxy-3,4-dioxopentyl phosphate | - |
? | |
ATP + 4,5-dihydroxypentane-2,3-dione | the kinase LsrK phosphorylates carbon-5 of the open form of the substrate, mass spectrometric product identification. Molecule (S)-4,5-dihydroxypentane-2,3-dione (DPD) is the precursor of the signal molecule autoinducer-2 | Salmonella enterica | ADP + 2-hydroxy-3,4-dioxopentyl phosphate | - |
? | |
ATP + 4,5-dihydroxypentane-2,3-dione | the kinase LsrK phosphorylates carbon-5 of the open form of the substrate, molecule (S)-4,5-dihydroxypentane-2,3-dione is the precursor of the signal molecule autoinducer-2 | Salmonella enterica serovar Typhimurium | ADP + 2-hydroxy-3,4-dioxopentyl phosphate | - |
? | |
ATP + 4,5-dihydroxypentane-2,3-dione | the kinase LsrK phosphorylates carbon-5 of the open form of the substrate, mass spectrometric product identification. Molecule (S)-4,5-dihydroxypentane-2,3-dione (DPD) is the precursor of the signal molecule autoinducer-2 | Salmonella enterica serovar Typhimurium | ADP + 2-hydroxy-3,4-dioxopentyl phosphate | - |
? | |
ATP + autoinducer-2 | - |
Salmonella enterica | ADP + phosphorylated autoinducer-2 | - |
? | |
ATP + autoinducer-2 | i.e. AI-2 | Salmonella enterica | ADP + phosphorylated autoinducer-2 | - |
? | |
ATP + autoinducer-2 | - |
Salmonella enterica serovar Typhimurium | ADP + phosphorylated autoinducer-2 | - |
? |
Synonyms | Comment | Organism |
---|---|---|
lsrK | - |
Salmonella enterica |
Temperature Optimum [°C] | Temperature Optimum Maximum [°C] | Comment | Organism |
---|---|---|---|
37 | - |
assay at | Salmonella enterica |
pH Optimum Minimum | pH Optimum Maximum | Comment | Organism |
---|---|---|---|
7.5 | - |
assay at | Salmonella enterica |
Cofactor | Comment | Organism | Structure |
---|---|---|---|
ATP | - |
Salmonella enterica |
Organism | Comment | Expression |
---|---|---|
Salmonella enterica | phosphorylated 4,5-dihydroxy-2,3-pentanedione (P-DPD) binds specifically to the repressor of the lsr operon, LsrR, consistent with P-DPD being the inducer of the lsr operon | up |
General Information | Comment | Organism |
---|---|---|
physiological function | enteric bacteria respond to the presence of competitor bacteria by sequestering and destroying autoinducer-2, through phosphorylation by the enzyme LsrK and cleavage of 4-hydroxy-2,3-pentanedione 5-phosphate producing 2-phosphoglycolic acid via enzyme LsrG, thereby eliminating the competitors' intercellular communication capabilities. The phosphorylated form of AI-2 is the intracellular signal responsible for lsr activation | Salmonella enterica |