Literature summary extracted from
Schmohl, L.; Wagner, F.R.; Schuemann, M.; Krause, E.; Schwarzer, D.
Semisynthesis and initial characterization of sortase A mutants containing selenocysteine and homocysteine (2015), Bioorg. Med. Chem., 23, 2883-2889.
Application
EC Number |
Application |
Comment |
Organism |
---|
3.4.22.70 |
analysis |
semisynthetic active site mutant enzymes containing selenocysteine and homocysteine might represent useful tools for further biochemical investigations and engineering approaches of sortases A |
Staphylococcus aureus |
3.4.22.70 |
biotechnology |
the bacterial transpeptidase sortase A is a well-established tool in protein chemistry and catalyzes the chemoselective ligation of peptides and proteins |
Staphylococcus aureus |
3.4.22.70 |
synthesis |
the bacterial transpeptidase sortase A is a well-established tool in protein chemistry and catalyzes the chemoselective ligation of peptides and proteins |
Staphylococcus aureus |
Cloned(Commentary)
EC Number |
Cloned (Comment) |
Organism |
---|
3.4.22.70 |
recombinant expression of His-tagged wild-type and mutant enzymes in Escherichia coli strain BL21(DE3) |
Staphylococcus aureus |
Protein Variants
EC Number |
Protein Variants |
Comment |
Organism |
---|
3.4.22.70 |
C184A |
site-directed mutagenesis |
Staphylococcus aureus |
3.4.22.70 |
C184Hcy |
site-directed mutagenesis, generation of a sortase mutant with Cys184 replaced by homocysteine (Hcy). Mutant Hcy-sortase is a poor catalyst with less than 1% of wild-type activity. The sensitivity of the active site nucleophiles towards an alkylation reagent correlates with the pKa values of the mutated residues |
Staphylococcus aureus |
3.4.22.70 |
C184Sec |
site-directed mutagenesis, generation of a sortase mutant with Cys184 replaced by selenocysteine (Sec). Mutant Sec-sortase shows a moderate 2-3fold reduction in catalytic activity. The sensitivity of the active site nucleophiles towards an alkylation reagent correlates with the pKa values of the mutated residues. The pH-profile of mutant Sec-sortase is shifted to more acidic conditions when compared to the wild-type enzyme |
Staphylococcus aureus |
Inhibitors
EC Number |
Inhibitors |
Comment |
Organism |
Structure |
---|
3.4.22.70 |
iodoacetamide |
active site Cys184 of sortase A can be alkylated by iodoacetamide resulting in irreversible modified enzyme. The selenol and thiol of mutant Sec-sortase and mutant Hcy-sortase are sensitive to alkylation as well |
Staphylococcus aureus |
|
Natural Substrates/ Products (Substrates)
EC Number |
Natural Substrates |
Organism |
Comment (Nat. Sub.) |
Natural Products |
Comment (Nat. Pro.) |
Rev. |
Reac. |
---|
3.4.22.70 |
additional information |
Staphylococcus aureus |
the bacterial transpeptidase sortase A catalyzes the chemoselective ligation of peptides and proteins. During catalysis sortase A cleaves the conserved Leu-Pro-X-Thr-Gly sorting motif at the Thr residue under concomitant thioester formation at active site Cys184 |
? |
- |
? |
|
Organism
EC Number |
Organism |
UniProt |
Comment |
Textmining |
---|
3.4.22.70 |
Staphylococcus aureus |
- |
- |
- |
Purification (Commentary)
EC Number |
Purification (Comment) |
Organism |
---|
3.4.22.70 |
recombinant His-tagged wild-type and mutant enzymes from Escherichia coli strain BL21(DE3) by nickel affinity chromaatography and dialysis |
Staphylococcus aureus |
Substrates and Products (Substrate)
EC Number |
Substrates |
Comment Substrates |
Organism |
Products |
Comment (Products) |
Rev. |
Reac. |
---|
3.4.22.70 |
Abz-LPKTGK(Dnp)KK + GGGWW |
substrate peptide 1 (Abz-LPKTGK(Dnp)KK) and acceptor peptide 2 (GGGWW) |
Staphylococcus aureus |
Abz-LPKTGGGWW + GK(Dnp)KK |
- |
? |
|
3.4.22.70 |
Dns-LPKTGGRR + GGGWW |
dansyl-labeled Dns-LPKTGGRR substrate peptide and acceptor peptide 2 (GGGWW) |
Staphylococcus aureus |
Dns-LPKTGGGWW + GGRR |
- |
? |
|
3.4.22.70 |
additional information |
the bacterial transpeptidase sortase A catalyzes the chemoselective ligation of peptides and proteins. During catalysis sortase A cleaves the conserved Leu-Pro-X-Thr-Gly sorting motif at the Thr residue under concomitant thioester formation at active site Cys184 |
Staphylococcus aureus |
? |
- |
? |
|
Temperature Optimum [°C]
EC Number |
Temperature Optimum [°C] |
Temperature Optimum Maximum [°C] |
Comment |
Organism |
---|
3.4.22.70 |
25 |
- |
assay at |
Staphylococcus aureus |
pH Optimum
EC Number |
pH Optimum Minimum |
pH Optimum Maximum |
Comment |
Organism |
---|
3.4.22.70 |
7.5 |
- |
mutant Sec-sortase enzyme |
Staphylococcus aureus |
3.4.22.70 |
8.5 |
9 |
wild-type enzyme |
Staphylococcus aureus |
pH Range
EC Number |
pH Minimum |
pH Maximum |
Comment |
Organism |
---|
3.4.22.70 |
5.5 |
9.5 |
mutant Sec-sortase enzyme, activity range, profile overview |
Staphylococcus aureus |
3.4.22.70 |
6.5 |
11 |
wild-type enzyme, activity range, profile overview |
Staphylococcus aureus |
General Information
EC Number |
General Information |
Comment |
Organism |
---|
3.4.22.70 |
additional information |
during catalysis sortase A cleaves the conserved Leu-Pro-X-Thr-Gly sorting motif at the Thr residue under concomitant thioester formation at active site Cys184, mechanism, overview |
Staphylococcus aureus |