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Literature summary for 3.2.1.39 extracted from

  • Hrmova, M.; Fincher, G.B.
    Purification and properties of three (1-3)-beta-D-glucanase isoenzymes from young leaves of barley (Hordeum vulgare) (1993), Biochem. J., 289, 453-461.
    View publication on PubMedView publication on EuropePMC

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
0.17
-
Laminarin isoform GI Hordeum vulgare
0.18
-
Laminarin isoform GIII Hordeum vulgare
0.21
-
Laminarin isoform GII Hordeum vulgare

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
32000
-
isoforms GI, GII and GIII, SDS-PAGE Hordeum vulgare

Organism

Organism UniProt Comment Textmining
Hordeum vulgare
-
barley
-

Posttranslational Modification

Posttranslational Modification Comment Organism
glycoprotein isoform GIII, 12-17% carbohydrate content, w/w Hordeum vulgare

Purification (Commentary)

Purification (Comment) Organism
to homogeneity, 4-5step chromatography Hordeum vulgare

Source Tissue

Source Tissue Comment Organism Textmining
leaf
-
Hordeum vulgare
-

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
40.5
-
isoform GIII Hordeum vulgare
240.5
-
isoform GII Hordeum vulgare
281.5
-
isoform GI Hordeum vulgare

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
beta-glucan + H2O low activity Hordeum vulgare ?
-
?
beta-glucan + H2O from yeast Hordeum vulgare ?
-
?
laminarin + H2O highest rates from Laminaria digitata, major products are laminaribiose and laminaritriose for isoforms GII and GIII, GI yields predominantly (1-3)-beta-D-oligoglucosides greater than 4 units Hordeum vulgare D-glucose + ?
-
?
O-carboxymethyl-(1,3:1,6)-beta-D-glucan + H2O from yeast, low activity Hordeum vulgare ?
-
?

Synonyms

Synonyms Comment Organism
(1-3)-beta-D-glucanase three isoforms, GI, GII and GIII Hordeum vulgare

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
4.8
-
isoforms GI, GII and GIII Hordeum vulgare

pH Stability

pH Stability pH Stability Maximum Comment Organism
5
-
below less activity for isoform GI than for GII or GIII Hordeum vulgare
6
-
isoforms GI and GII retain 17-27% activity, GIII retaines 66% activity Hordeum vulgare