EC Number | Cloned (Comment) | Organism |
---|---|---|
2.3.1.B27 | expression in Escherichia coli | Saccharolobus solfataricus |
EC Number | Crystallization (Comment) | Organism |
---|---|---|
2.3.1.B27 | crystals of enzyme/CoA complex are grown by hanging drop vapor diffusion in 20 days at 20°C using a well solution containing 0.1 M MES, pH 6.5, and 12% PEG 20,000. Crystals are cryoprotected using well solution supplemented with 30% glycerol | Saccharolobus solfataricus |
EC Number | Protein Variants | Comment | Organism |
---|---|---|---|
2.3.1.B27 | D29A | reduction in activity by about 2fold | Saccharolobus solfataricus |
2.3.1.B27 | D53N | modest reduction in activity | Saccharolobus solfataricus |
2.3.1.B27 | E42Q | modest reduction in activity | Saccharolobus solfataricus |
2.3.1.B27 | E43Q | modest reduction in activity | Saccharolobus solfataricus |
2.3.1.B27 | E76A | activity is reduced to near background levels | Saccharolobus solfataricus |
2.3.1.B27 | E76Q | mutation has no effect on activity | Saccharolobus solfataricus |
2.3.1.B27 | H36A | mutant shows activity similar to the wild type enzyme | Saccharolobus solfataricus |
2.3.1.B27 | H72A | lowered activity | Saccharolobus solfataricus |
2.3.1.B27 | H72A | modest reduction in activity | Saccharolobus solfataricus |
2.3.1.B27 | H72A/E76Q | activity is reduced to near background levels | Saccharolobus solfataricus |
2.3.1.B27 | M121H | mutation results in about a 2fold increase in protein substrate Km and about a 5fold decrease in overall kcat, despite little change in the Km for acetyl-CoA | Saccharolobus solfataricus |
2.3.1.B27 | M121Y | mutation results in about a 2fold increase in protein substrate Km and about a 5fold decrease in overall kcat, despite little change in the Km for acetyl-CoA | Saccharolobus solfataricus |
2.3.1.B27 | R33A | reduction in activity to near background levels. Km for Ac-CoA is similar to wild type and elevated by about 2fold for protein substrate, whereas the overall kcat is reduced about 5fold relative to the wild type protein | Saccharolobus solfataricus |
2.3.1.B27 | S78A | the activity for both mutants is close to wild type | Saccharolobus solfataricus |
2.3.1.B27 | S78C | the activity for both mutants is close to wild type | Saccharolobus solfataricus |
2.3.1.B27 | Y38S | modest reduction in activity | Saccharolobus solfataricus |
EC Number | KM Value [mM] | KM Value Maximum [mM] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|---|
2.3.1.B27 | additional information | - |
[DNA-binding protein Alba1]-L-lysine16 | P6A, P8A, and G15A mutants of ALBA have Km values similar to wild type ALBA, thus revealing that these residues do not play a significant role of PAT acetylation of ALBA | Saccharolobus solfataricus | |
2.3.1.B27 | 0.037 | - |
acetyl-CoA | pH 8.0, 75°C, ALBA 11-mer peptide with the sequence VLIGKKPVMNY, mutant enzyme R33A | Saccharolobus solfataricus | |
2.3.1.B27 | 0.039 | - |
acetyl-CoA | pH 8.0, 75°C, ALBA 11-mer peptide with the sequence VLIGKKPVMNY, mutant enzyme H72A/E76Q | Saccharolobus solfataricus | |
2.3.1.B27 | 0.048 | - |
acetyl-CoA | pH 8.0, 75°C, ALBA 11-mer peptide with the sequence VLIGKKPVMNY, mutant enzyme M121H | Saccharolobus solfataricus | |
2.3.1.B27 | 0.048 | - |
acetyl-CoA | pH 8.0, 75°C, ALBA 11-mer peptide with the sequence VLIGKKPVMNY, wild-type enzyme | Saccharolobus solfataricus | |
2.3.1.B27 | 0.05 | - |
acetyl-CoA | pH 8.0, 75°C, ALBA 11-mer peptide with the sequence VLIGKKPVMNY, mutant enzyme M121Y | Saccharolobus solfataricus | |
2.3.1.B27 | 0.059 | - |
acetyl-CoA | pH 8.0, 75°C, ALBA 11-mer peptide with the sequence VLIGKKPVMNY, mutant enzyme E76A | Saccharolobus solfataricus | |
2.3.1.B27 | 0.11 | - |
[DNA-binding protein Alba1]-L-lysine16 | pH 8.0, 75°C, ALBA 11-mer peptide with the sequence VLIGKKPVMNY, wild-type enzyme | Saccharolobus solfataricus | |
2.3.1.B27 | 0.58 | - |
VLIGKKPVMNY | pH 8.0, 75°C, ALBA 11-mer peptide with the sequence VLIGKKPVMNY, wild-type enzyme | Saccharolobus solfataricus | |
2.3.1.B27 | 0.91 | - |
VLIGKKPVMNY | pH 8.0, 75°C, ALBA 11-mer peptide with the sequence VLIGKKPVMNY, mutant enzyme H72A/E76Q | Saccharolobus solfataricus | |
2.3.1.B27 | 0.94 | - |
VLIGKKPVMNY | pH 8.0, 75°C, ALBA 11-mer peptide with the sequence VLIGKKPVMNY, mutant enzyme E76A | Saccharolobus solfataricus | |
2.3.1.B27 | 1.2 | - |
VLIGKKPVMNY | pH 8.0, 75°C, ALBA 11-mer peptide with the sequence VLIGKKPVMNY, mutant enzyme M121H | Saccharolobus solfataricus | |
2.3.1.B27 | 1.2 | - |
VLIGKKPVMNY | pH 8.0, 75°C, ALBA 11-mer peptide with the sequence VLIGKKPVMNY, mutant enzyme R33A | Saccharolobus solfataricus | |
2.3.1.B27 | 1.3 | - |
VLIGKKPVMNY | pH 8.0, 75°C, ALBA 11-mer peptide with the sequence VLIGKKPVMNY, mutant enzyme M121Y | Saccharolobus solfataricus |
EC Number | Natural Substrates | Organism | Comment (Nat. Sub.) | Natural Products | Comment (Nat. Pro.) | Rev. | Reac. |
---|---|---|---|---|---|---|---|
2.3.1.B27 | acetyl-CoA + [DNA-binding protein Alba1]-L-lysine16 | Saccharolobus solfataricus | the Sulfolobus solfataricus protein acetyltransferase acetylates ALBA, an abundant nonspecific DNA-binding protein, on Lys16 to reduce its DNA affinity, and the Sir2 deacetylase reverses the modification to cause transcriptional repression. This represents a primitive model for chromatin regulation analogous to histone modification in eukaryotes | CoA + [DNA-binding protein Alba1]-N6-acetyl-L-lysine16 | - |
? | |
2.3.1.B27 | acetyl-CoA + [DNA-binding protein Alba1]-L-lysine16 | Saccharolobus solfataricus P2 | the Sulfolobus solfataricus protein acetyltransferase acetylates ALBA, an abundant nonspecific DNA-binding protein, on Lys16 to reduce its DNA affinity, and the Sir2 deacetylase reverses the modification to cause transcriptional repression. This represents a primitive model for chromatin regulation analogous to histone modification in eukaryotes | CoA + [DNA-binding protein Alba1]-N6-acetyl-L-lysine16 | - |
? |
EC Number | Organism | UniProt | Comment | Textmining |
---|---|---|---|---|
2.3.1.B27 | Saccharolobus solfataricus | Q97V23 | - |
- |
2.3.1.B27 | Saccharolobus solfataricus P2 | Q97V23 | - |
- |
EC Number | Purification (Comment) | Organism |
---|---|---|
2.3.1.B27 | - |
Saccharolobus solfataricus |
EC Number | Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|---|
2.3.1.B27 | acetyl-CoA + VLIGKKPVMNY | - |
Saccharolobus solfataricus | CoA + VLIG-K(Ac)-KPVMNY | - |
? | |
2.3.1.B27 | acetyl-CoA + VLIGKKPVMNY | - |
Saccharolobus solfataricus P2 | CoA + VLIG-K(Ac)-KPVMNY | - |
? | |
2.3.1.B27 | acetyl-CoA + [DNA-binding protein Alba1]-L-lysine16 | - |
Saccharolobus solfataricus | CoA + [DNA-binding protein Alba1]-N6-acetyl-L-lysine16 | - |
? | |
2.3.1.B27 | acetyl-CoA + [DNA-binding protein Alba1]-L-lysine16 | the Sulfolobus solfataricus protein acetyltransferase acetylates ALBA, an abundant nonspecific DNA-binding protein, on Lys16 to reduce its DNA affinity, and the Sir2 deacetylase reverses the modification to cause transcriptional repression. This represents a primitive model for chromatin regulation analogous to histone modification in eukaryotes | Saccharolobus solfataricus | CoA + [DNA-binding protein Alba1]-N6-acetyl-L-lysine16 | - |
? | |
2.3.1.B27 | acetyl-CoA + [DNA-binding protein Alba1]-L-lysine16 | - |
Saccharolobus solfataricus P2 | CoA + [DNA-binding protein Alba1]-N6-acetyl-L-lysine16 | - |
? | |
2.3.1.B27 | acetyl-CoA + [DNA-binding protein Alba1]-L-lysine16 | the Sulfolobus solfataricus protein acetyltransferase acetylates ALBA, an abundant nonspecific DNA-binding protein, on Lys16 to reduce its DNA affinity, and the Sir2 deacetylase reverses the modification to cause transcriptional repression. This represents a primitive model for chromatin regulation analogous to histone modification in eukaryotes | Saccharolobus solfataricus P2 | CoA + [DNA-binding protein Alba1]-N6-acetyl-L-lysine16 | - |
? |
EC Number | Temperature Optimum [°C] | Temperature Optimum Maximum [°C] | Comment | Organism |
---|---|---|---|---|
2.3.1.B27 | 75 | - |
assay at | Saccharolobus solfataricus |
EC Number | Temperature Minimum [°C] | Temperature Maximum [°C] | Comment | Organism |
---|---|---|---|---|
2.3.1.B27 | additional information | - |
the enzyme is nearly completely inactive at room temperature | Saccharolobus solfataricus |
EC Number | Turnover Number Minimum [1/s] | Turnover Number Maximum [1/s] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|---|
2.3.1.B27 | 0.0067 | - |
VLIGKKPVMNY | pH 8.0, 75°C, ALBA 11-mer peptide with the sequence VLIGKKPVMNY, mutant enzyme E76A | Saccharolobus solfataricus | |
2.3.1.B27 | 0.0067 | - |
VLIGKKPVMNY | pH 8.0, 75°C, ALBA 11-mer peptide with the sequence VLIGKKPVMNY, mutant enzyme M121Y | Saccharolobus solfataricus | |
2.3.1.B27 | 0.0083 | - |
VLIGKKPVMNY | pH 8.0, 75°C, ALBA 11-mer peptide with the sequence VLIGKKPVMNY, mutant enzyme R33A | Saccharolobus solfataricus | |
2.3.1.B27 | 0.0092 | - |
VLIGKKPVMNY | pH 8.0, 75°C, ALBA 11-mer peptide with the sequence VLIGKKPVMNY, mutant enzyme M121H | Saccharolobus solfataricus | |
2.3.1.B27 | 0.022 | - |
VLIGKKPVMNY | pH 8.0, 75°C, ALBA 11-mer peptide with the sequence VLIGKKPVMNY, mutant enzyme H72A/E76Q | Saccharolobus solfataricus | |
2.3.1.B27 | 0.0385 | - |
VLIGKKPVMNY | pH 8.0, 75°C, ALBA 11-mer peptide with the sequence VLIGKKPVMNY, wild-type enzyme | Saccharolobus solfataricus | |
2.3.1.B27 | 0.0385 | - |
[DNA-binding protein Alba1]-L-lysine16 | pH 8.0, 75°C, ALBA 11-mer peptide with the sequence VLIGKKPVMNY, wild-type enzyme | Saccharolobus solfataricus |
EC Number | pH Optimum Minimum | pH Optimum Maximum | Comment | Organism |
---|---|---|---|---|
2.3.1.B27 | 8 | - |
assay at | Saccharolobus solfataricus |
EC Number | General Information | Comment | Organism |
---|---|---|---|
2.3.1.B27 | physiological function | the Sulfolobus solfataricus protein acetyltransferase acetylates ALBA, an abundant nonspecific DNA-binding protein, on Lys16 to reduce its DNA affinity, and the Sir2 deacetylase reverses the modification to cause transcriptional repression. This represents a primitive model for chromatin regulation analogous to histone modification in eukaryotes | Saccharolobus solfataricus |
EC Number | kcat/KM Value [1/mMs-1] | kcat/KM Value Maximum [1/mMs-1] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|---|
2.3.1.B27 | 0.0051 | - |
VLIGKKPVMNY | pH 8.0, 75°C, ALBA 11-mer peptide with the sequence VLIGKKPVMNY, mutant enzyme M121Y | Saccharolobus solfataricus | |
2.3.1.B27 | 0.0069 | - |
VLIGKKPVMNY | pH 8.0, 75°C, ALBA 11-mer peptide with the sequence VLIGKKPVMNY, mutant enzyme R33A | Saccharolobus solfataricus | |
2.3.1.B27 | 0.0071 | - |
VLIGKKPVMNY | pH 8.0, 75°C, ALBA 11-mer peptide with the sequence VLIGKKPVMNY, mutant enzyme E76A | Saccharolobus solfataricus | |
2.3.1.B27 | 0.0077 | - |
VLIGKKPVMNY | pH 8.0, 75°C, ALBA 11-mer peptide with the sequence VLIGKKPVMNY, mutant enzyme M121H | Saccharolobus solfataricus | |
2.3.1.B27 | 0.024 | - |
VLIGKKPVMNY | pH 8.0, 75°C, ALBA 11-mer peptide with the sequence VLIGKKPVMNY, mutant enzyme H72A/E76Q | Saccharolobus solfataricus | |
2.3.1.B27 | 0.066 | - |
VLIGKKPVMNY | pH 8.0, 75°C, ALBA 11-mer peptide with the sequence VLIGKKPVMNY, wild-type enzyme | Saccharolobus solfataricus | |
2.3.1.B27 | 0.35 | - |
[DNA-binding protein Alba1]-L-lysine16 | pH 8.0, 75°C, ALBA 11-mer peptide with the sequence VLIGKKPVMNY, wild-type enzyme | Saccharolobus solfataricus |