Cloned (Comment) | Organism |
---|---|
a truncated version, without the 24 N-terminal residues, is heterologously expressed in Escherichia coli | Helianthus annuus |
Inhibitors | Comment | Organism | Structure |
---|---|---|---|
ADP | - |
Helianthus annuus |
KM Value [mM] | KM Value Maximum [mM] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|
0.01911 | - |
D-mannose | pH 7.0, 22°C | Helianthus annuus | |
0.02164 | - |
D-mannose | pH 7.6, 22°C | Helianthus annuus | |
0.02339 | - |
D-mannose | pH 8.2, 22°C | Helianthus annuus | |
0.03054 | - |
ATP | pH 7.6, 22°C | Helianthus annuus | |
0.0338 | - |
D-glucose | pH 7.0, 22°C | Helianthus annuus | |
0.034 | - |
D-glucose | pH 8.2, 22°C | Helianthus annuus | |
0.03872 | - |
D-glucose | pH 7.6, 22°C | Helianthus annuus | |
0.06948 | - |
ATP | pH 8.2, 22°C | Helianthus annuus | |
0.08816 | - |
ATP | pH 7.0, 22°C | Helianthus annuus | |
0.654 | - |
GTP | pH 8.2, 22°C | Helianthus annuus | |
0.717 | - |
GTP | pH 7.0, 22°C | Helianthus annuus | |
0.788 | - |
GTP | pH 7.6, 22°C | Helianthus annuus | |
1.162 | - |
UTP | pH 7.0, 22°C | Helianthus annuus | |
1.598 | - |
UTP | pH 7.6, 22°C | Helianthus annuus | |
1.791 | - |
UTP | pH 8.2, 22°C | Helianthus annuus | |
1.993 | - |
CTP | pH 7.6, 22°C | Helianthus annuus | |
2.317 | - |
CTP | pH 8.2, 22°C | Helianthus annuus | |
3.625 | - |
D-fructose | pH 7.0, 22°C | Helianthus annuus | |
4.567 | - |
D-fructose | pH 7.6, 22°C | Helianthus annuus | |
5.145 | - |
D-fructose | pH 8.2, 22°C | Helianthus annuus |
Molecular Weight [Da] | Molecular Weight Maximum [Da] | Comment | Organism |
---|---|---|---|
52600 | - |
predicted from cDNA | Helianthus annuus |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
Helianthus annuus | B8K2W7 | - |
- |
Purification (Comment) | Organism |
---|---|
using immobilized metal ion affinity chromatography | Helianthus annuus |
Source Tissue | Comment | Organism | Textmining |
---|---|---|---|
cotyledon | - |
Helianthus annuus | - |
root | - |
Helianthus annuus | - |
seed | - |
Helianthus annuus | - |
stem | - |
Helianthus annuus | - |
Specific Activity Minimum [µmol/min/mg] | Specific Activity Maximum [µmol/min/mg] | Comment | Organism |
---|---|---|---|
19.3 | - |
pH 7.6, 22°C | Helianthus annuus |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
ATP + D-fructose | - |
Helianthus annuus | ADP + D-fructose 6-phosphate | - |
? | |
ATP + D-glucose | - |
Helianthus annuus | ADP + D-glucose 6-phosphate | - |
? | |
ATP + D-mannose | - |
Helianthus annuus | ADP + D-mannose 6-phosphate | - |
? | |
CTP + D-glucose | - |
Helianthus annuus | CDP + D-glucose 6-phosphate | - |
? | |
GTP + D-glucose | - |
Helianthus annuus | GDP + D-glucose 6-phosphate | - |
? | |
UTP + D-glucose | - |
Helianthus annuus | UDP + D-glucose 6-phosphate | - |
? |
Subunits | Comment | Organism |
---|---|---|
monomer | gel filtration | Helianthus annuus |
Synonyms | Comment | Organism |
---|---|---|
HaHXK1 | - |
Helianthus annuus |
Temperature Optimum [°C] | Temperature Optimum Maximum [°C] | Comment | Organism |
---|---|---|---|
22 | - |
- |
Helianthus annuus |
Temperature Stability Minimum [°C] | Temperature Stability Maximum [°C] | Comment | Organism |
---|---|---|---|
40 | - |
enzyme retains 80% activity at 40°C | Helianthus annuus |
48 | - |
enzyme shows no activity above 48°C | Helianthus annuus |
pH Optimum Minimum | pH Optimum Maximum | Comment | Organism |
---|---|---|---|
7.6 | - |
optimal pH | Helianthus annuus |
pH Stability | pH Stability Maximum | Comment | Organism |
---|---|---|---|
7 | - |
enzyme shows only 40% activity at pH 7.0 | Helianthus annuus |
Organism | Comment | Expression |
---|---|---|
Helianthus annuus | higher levels in heterotrophic tissues, developing seeds and roots, than in photosynthetic ones. A time course of HXK activity and expression in seeds shows that the highest HXK levels are found at the early stages of reserve compounds, lipids and proteins accumulation | up |