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Literature summary for 5.5.1.4 extracted from

  • RayChaudhuri, A.; Hait, N.C.; das Gupta, S.; Bhaduri, T.J.; Deb, R.; Majumder, A.L.
    L-myo-Inositol 1-phosphate synthase from plant sources (1997), Plant Physiol., 115, 727-736.
    View publication on PubMedView publication on EuropePMC

Activating Compound

Activating Compound Comment Organism Structure
NH4+
-
Saccharomyces cerevisiae
NH4+ 10-14 mM NH4Cl, 5fold stimulation. Other NH4+ salts are strong inhibitors Euglena gracilis
NH4+ 10-14 mM NH4Cl, 5fold stimulation. Other NH4+ salts are strong inhibitors Vigna radiata
NH4+ 10-14 mM NH4Cl, 5fold stimulation. Other NH4+ salts are strong inhibitors Oryza sativa

Inhibitors

Inhibitors Comment Organism Structure
(NH4)2SO4
-
Euglena gracilis
(NH4)2SO4
-
Oryza sativa
(NH4)2SO4
-
Vigna radiata
Cu2+ CuCl2 Euglena gracilis
Cu2+ CuCl2 Oryza sativa
Cu2+ CuCl2 Vigna radiata
D-fructose 6-phosphate
-
Euglena gracilis
D-fructose 6-phosphate
-
Oryza sativa
D-fructose 6-phosphate
-
Vigna radiata
D-galactose 6-phosphate
-
Euglena gracilis
D-galactose 6-phosphate
-
Oryza sativa
D-galactose 6-phosphate
-
Vigna radiata
FeCl2
-
Euglena gracilis
FeCl2
-
Oryza sativa
FeCl2
-
Vigna radiata
glucitol 6-phosphate
-
Euglena gracilis
glucitol 6-phosphate
-
Oryza sativa
glucitol 6-phosphate
-
Vigna radiata
Inositol 4 mM Euglena gracilis
Inositol 4 mM Oryza sativa
Inositol 4 mM Vigna radiata
K+ concentration-dependent inhibition up to 5 mM Euglena gracilis
K+ 5 mM, 10-15% inhibition Oryza sativa
K+ concentration-dependent inhibition up to 5 mM Vigna radiata
Li+ LiCl Euglena gracilis
Li+ LiCl Oryza sativa
Li+ LiCl Vigna radiata
mannitol 4 mM Euglena gracilis
mannitol 4 mM Oryza sativa
mannitol 4 mM Vigna radiata
Na+ 1 mM and above; chloroplastic and cytosolic enzyme Euglena gracilis
Na+ 1 mM and above; chloroplastic enzyme Vigna radiata
NEM 0.5-2 mM Euglena gracilis
NEM 0.5-2 mM Oryza sativa
NH4HCO3
-
Euglena gracilis
NH4HCO3
-
Oryza sativa
NH4HCO3
-
Vigna radiata
PbCl2
-
Euglena gracilis
PbCl2
-
Oryza sativa
PbCl2
-
Vigna radiata
PCMB 0.5-2 mM Euglena gracilis
PCMB 0.5-2 mM Oryza sativa
sorbitol 4 mM Euglena gracilis
sorbitol 4 mM Oryza sativa
sorbitol 4 mM Vigna radiata
Zn2+ ZnCl2 Euglena gracilis
Zn2+ ZnCl2 Oryza sativa
Zn2+ ZnCl2 Vigna radiata

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
0.08
-
NAD+ chloroplastic enzyme Oryza sativa
0.11
-
NAD+ cytosolic enzyme Arthrospira platensis
0.12
-
NAD+ chloroplastic enzyme Euglena gracilis
0.14
-
NAD+ cytosolic enzyme Oryza sativa
0.16
-
NAD+ cytosolic enzyme from green cells Euglena gracilis
0.19
-
NAD+ cytosolic enzyme from dark-grown cells Euglena gracilis
0.2
-
NAD+ cytosolic enzyme from streptomycin-bleached cells Euglena gracilis
0.26
-
D-glucose 6-phosphate NAD+, chloroplastic enzyme Vigna radiata
1.95
-
glucose 6-phosphate cytosolic enzyme from streptomycin-bleached cells, and chloroplastidic enzyme Euglena gracilis
1.97
-
glucose 6-phosphate cytosolic enzyme Oryza sativa
2.14
-
glucose 6-phosphate chloroplastic enzyme Oryza sativa
2.17
-
glucose 6-phosphate cytosolic enzyme Arthrospira platensis
2.25
-
glucose 6-phosphate cytosolic enzyme from green cells Euglena gracilis
2.51
-
glucose 6-phosphate cytosolic enzyme from dark-grown cells Euglena gracilis
2.85
-
glucose 6-phosphate chloroplastic enzyme Vigna radiata

Localization

Localization Comment Organism GeneOntology No. Textmining
chloroplast
-
Euglena gracilis 9507
-
chloroplast
-
Vigna radiata 9507
-
chloroplast
-
Oryza sativa 9507
-
cytosol
-
Euglena gracilis 5829
-
cytosol
-
Vigna radiata 5829
-
cytosol
-
Oryza sativa 5829
-
cytosol
-
Arthrospira platensis 5829
-

Metals/Ions

Metals/Ions Comment Organism Structure
K+
-
Saccharomyces cerevisiae
K+ stimulation of chloroplastic and cytosolic enzyme up to 2.5 mM Oryza sativa

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
59000
-
3 * 59000, cytosolic enzyme, SDS-PAGE Oryza sativa
59000
-
4 * 59000, chloroplastic enzyme, SDS-PAGE Oryza sativa
61000
-
3 * 61000, cytosolic enzyme, SDS-PAGE Euglena gracilis
61000
-
4 * 61000, chloroplastic enzyme, SDS-PAGE Euglena gracilis
67000
-
3 * 67000, cytosolic enzyme, SDS-PAGE Arthrospira platensis
67000
-
4 * 67000, chloroplastic enzyme, SDS-PAGE Arthrospira platensis
179000
-
cytosolic enzyme, gel filtration Euglena gracilis
179000
-
cytosolic enzyme, gel filtration Oryza sativa
200300
-
cytosolic enzyme, gel filtration Arthrospira platensis
248000
-
chloroplastic enzyme, gel filtration Euglena gracilis
253000
-
chloroplastic enzyme, gel filtration Oryza sativa
266000
-
chloroplastic enzyme, gel filtration Vigna radiata

Organism

Organism UniProt Comment Textmining
Arthrospira platensis
-
-
-
Euglena gracilis
-
-
-
Oryza sativa
-
-
-
Saccharomyces cerevisiae
-
-
-
Vigna radiata
-
-
-

Purification (Commentary)

Purification (Comment) Organism
-
Euglena gracilis
-
Vigna radiata
-
Oryza sativa
-
Arthrospira platensis

Source Tissue

Source Tissue Comment Organism Textmining
culture condition:inositol-deficient-grown cell
-
Saccharomyces cerevisiae
-
culture condition:inositol-deficient-grown cell
-
Euglena gracilis
-
leaf
-
Vigna radiata
-
leaf
-
Oryza sativa
-

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
D-Glucose 6-phosphate
-
Saccharomyces cerevisiae L-myo-Inositol 1-phosphate
-
?
D-Glucose 6-phosphate absolute specificity for Euglena gracilis L-myo-Inositol 1-phosphate
-
?
D-Glucose 6-phosphate absolute specificity for Vigna radiata L-myo-Inositol 1-phosphate
-
?
D-Glucose 6-phosphate absolute specificity for Oryza sativa L-myo-Inositol 1-phosphate
-
?
D-Glucose 6-phosphate absolute specificity for Arthrospira platensis L-myo-Inositol 1-phosphate
-
?

Subunits

Subunits Comment Organism
tetramer
-
Saccharomyces cerevisiae
tetramer
-
Vigna radiata
tetramer 4 * 67000, chloroplastic enzyme, SDS-PAGE Arthrospira platensis
tetramer 4 * 59000, chloroplastic enzyme, SDS-PAGE Oryza sativa
tetramer 4 * 61000, chloroplastic enzyme, SDS-PAGE Euglena gracilis
trimer 3 * 59000, cytosolic enzyme, SDS-PAGE Oryza sativa
trimer 3 * 61000, cytosolic enzyme, SDS-PAGE Euglena gracilis
trimer 3 * 67000, cytosolic enzyme, SDS-PAGE Arthrospira platensis

Temperature Optimum [°C]

Temperature Optimum [°C] Temperature Optimum Maximum [°C] Comment Organism
35 37
-
Euglena gracilis
35 37
-
Vigna radiata
35 37
-
Oryza sativa
35 37
-
Arthrospira platensis

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
7.2
-
chloroplastic enzyme Vigna radiata
7.6
-
chloroplastic enzyme Oryza sativa
7.6
-
cytosolic and chloroplastic enzyme Euglena gracilis
7.8
-
cytosolic enzyme Arthrospira platensis
8.2
-
cytosolic enzyme Oryza sativa