Activating Compound | Comment | Organism | Structure |
---|---|---|---|
additional information | TbPLA1 does not require metal cofactors for activity, but it does require interfacial activation prior to catalysis, activation by Triton X-100/glycerophosphatidylcholine mixed micelle surfaces is not specific and does not require the preformation of a specific enzyme-substrate complex to achieve surface binding, activation kinetics and mechanism, overview | Trypanosoma brucei |
Protein Variants | Comment | Organism |
---|---|---|
additional information | construction of the PLA1 deletion mutant cell line BSF lacking enzyme activity, overview | Trypanosoma brucei |
Inhibitors | Comment | Organism | Structure |
---|---|---|---|
arachidonyl trifluoromethyl ketone analogue | - |
Trypanosoma brucei | |
Ca2+ | slight inhibition at 2 mM | Trypanosoma brucei | |
Cd2+ | complete inhibition at 2 mM | Trypanosoma brucei | |
Co2+ | 43% inhibition at 2 mM | Trypanosoma brucei | |
Cu2+ | complete inhibition at 2 mM | Trypanosoma brucei | |
di-isopropyl fluorophosphate | TbPLA1 possesses an active-site serine residue, but is relatively insensitive to serine-modifying reagents such as di-isopropyl fluorophosphate and PMSF | Trypanosoma brucei | |
diethyl-p-nitrophenyl phosphate | - |
Trypanosoma brucei | |
E-600 | - |
Trypanosoma brucei | |
Fe2+ | complete inhibition at 2 mM | Trypanosoma brucei | |
Mn2+ | slight inhibition at 2 mM | Trypanosoma brucei | |
additional information | PLA1 is not affected by Mg2+, Cs2+, and EDTA | Trypanosoma brucei | |
Ni2+ | 57% inhibition at 2 mM | Trypanosoma brucei | |
palmitoyl trifluoromethyl ketone analogue | - |
Trypanosoma brucei | |
PMSF | TbPLA1 possesses an active-site serine residue, but is relatively insensitive to serine-modifying reagents such as di-isopropyl fluorophosphate and PMSF | Trypanosoma brucei | |
Zn2+ | 66% inhibition at 2 mM | Trypanosoma brucei |
KM Value [mM] | KM Value Maximum [mM] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|
additional information | - |
additional information | kinetic analysis of enzyme activation | Trypanosoma brucei |
Metals/Ions | Comment | Organism | Structure |
---|---|---|---|
additional information | TbPLA1 does not require metal co-factors for activity | Trypanosoma brucei |
Molecular Weight [Da] | Molecular Weight Maximum [Da] | Comment | Organism |
---|---|---|---|
29700 | - |
soluble free enzyme, gel filtration | Trypanosoma brucei |
137000 | - |
Triton X-100 micelle-bound PLA1, gel filtration | Trypanosoma brucei |
Natural Substrates | Organism | Comment (Nat. Sub.) | Natural Products | Comment (Nat. Pro.) | Rev. | Reac. |
---|---|---|---|---|---|---|
phosphatidylcholine + H2O | Trypanosoma brucei | - |
lysophosphocholine + a carboxylate | - |
? | |
phosphatidylcholine + H2O | Trypanosoma brucei 427 | - |
lysophosphocholine + a carboxylate | - |
? |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
Trypanosoma brucei | Q6KBS7 | from BALB/c mouse bloodstream | - |
Trypanosoma brucei 427 | Q6KBS7 | from BALB/c mouse bloodstream | - |
Source Tissue | Comment | Organism | Textmining |
---|---|---|---|
trypomastigote | from insect and bloodstream, the latter enzyme form shows a 3fold higher activity | Trypanosoma brucei | - |
Specific Activity Minimum [µmol/min/mg] | Specific Activity Maximum [µmol/min/mg] | Comment | Organism |
---|---|---|---|
3 | 8 | recombinant enzyme | Trypanosoma brucei |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
phosphatidylcholine + H2O | - |
Trypanosoma brucei | lysophosphocholine + a carboxylate | - |
? | |
phosphatidylcholine + H2O | TbPLA1 possesses an active-site serine residue, but is relatively insensitive to serine-modifying reagents such as di-isopropyl fluorophosphate and PMSF | Trypanosoma brucei | lysophosphocholine + a carboxylate | - |
? | |
phosphatidylcholine + H2O | - |
Trypanosoma brucei 427 | lysophosphocholine + a carboxylate | - |
? | |
phosphatidylcholine + H2O | TbPLA1 possesses an active-site serine residue, but is relatively insensitive to serine-modifying reagents such as di-isopropyl fluorophosphate and PMSF | Trypanosoma brucei 427 | lysophosphocholine + a carboxylate | - |
? |
Synonyms | Comment | Organism |
---|---|---|
PLA1 | - |
Trypanosoma brucei |
Temperature Optimum [°C] | Temperature Optimum Maximum [°C] | Comment | Organism |
---|---|---|---|
22 | - |
assay at | Trypanosoma brucei |
pH Optimum Minimum | pH Optimum Maximum | Comment | Organism |
---|---|---|---|
7 | - |
assay at | Trypanosoma brucei |