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Literature summary for 2.7.1.1 extracted from

  • Armstrong, R.L.; Wilson, J.E.; Shoemaker, C.B.
    Purification and characterization of the hexokinase from Schistosoma mansoni, expressed in Escherichia coli (1996), Protein Expr. Purif., 8, 374-380.
    View publication on PubMed

Cloned(Commentary)

Cloned (Comment) Organism
hexokinase cDNA is cloned, sequenced and expressed in Escherichia coli as a fusion protein including an N-terminal polyhistidine tag and enterokinase cleavage site Schistosoma mansoni

General Stability

General Stability Organism
monothioglycerol stabilizes, enzyme activity is highly dependent on maintenance of free SH-groups Schistosoma mansoni

Inhibitors

Inhibitors Comment Organism Structure
1,5-Anhydro-D-glucitol 6-phosphate less effective than glucose 6-phosphate, competitive versus ATP Schistosoma mansoni
D-glucose 6-phosphate competitive versus ATP; moderate inhibition Schistosoma mansoni

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
0.13
-
D-glucose at pH 8.5 Schistosoma mansoni
0.93
-
ATP at pH 8.5 Schistosoma mansoni

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
50400
-
x * 55000, calculated from the amino acid sequence, x * 50400, 52 kDa with His-tag at the N-terminus, SDS-PAGE Schistosoma mansoni
55000
-
x * 55000, calculated from the amino acid sequence, x * 50400, 52 kDa with His-tag at the N-terminus, SDS-PAGE Schistosoma mansoni

Organism

Organism UniProt Comment Textmining
Schistosoma mansoni
-
recombinant hexokinase
-

Purification (Commentary)

Purification (Comment) Organism
recombinant hexokinase, expressed in Escherichia coli Schistosoma mansoni

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
additional information
-
-
Schistosoma mansoni

Storage Stability

Storage Stability Organism
-80°C, 20 mM Hepes, 1 mM EDTA, 20 mM glucose, 10 mM monothioglycerol, pH 7.5, several months, stable Schistosoma mansoni
4°C, several days, progressive loss of activity Schistosoma mansoni

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
D-glucose + ATP
-
Schistosoma mansoni ADP + D-glucose 6-phosphate
-
?

Subunits

Subunits Comment Organism
? x * 55000, calculated from the amino acid sequence, x * 50400, 52 kDa with His-tag at the N-terminus, SDS-PAGE Schistosoma mansoni

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
8.5
-
assay at Schistosoma mansoni

pH Stability

pH Stability pH Stability Maximum Comment Organism
6 9 variations within the range have no substantial effect on stability during purification procedure Schistosoma mansoni

Cofactor

Cofactor Comment Organism Structure
ATP
-
Schistosoma mansoni

Ki Value [mM]

Ki Value [mM] Ki Value maximum [mM] Inhibitor Comment Organism Structure
0.15
-
D-glucose 6-phosphate at pH 8.5 Schistosoma mansoni
0.5
-
1,5-Anhydro-D-glucitol 6-phosphate at pH 8.5 Schistosoma mansoni

pI Value

Organism Comment pI Value Maximum pI Value
Schistosoma mansoni analytical isoelectric focusing
-
6