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Literature summary for 3.2.1.80 extracted from

  • Van Den Ende, W.; Clerens, S.; Vergauwen, R.; Van Riet, L.; Van Laere, A.; Yoshida, M.; Kawakami, A.
    Fructan 1-exohydrolases. beta-(2,1)-trimmers during graminan biosynthesis in stems of wheat? Purification, characterization, mass mapping, and cloning of two fructan 1-exohydrolase isoforms (2003), Plant Physiol., 131, 621-631.
    View publication on PubMedView publication on EuropePMC

Cloned(Commentary)

Cloned (Comment) Organism
-
Triticum aestivum

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
7
-
1-kestose pH 5.0, 30°C Triticum aestivum

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
70000
-
1 * 70000, SDS-PAGE Triticum aestivum

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
additional information Triticum aestivum the enzyme might play a role as a beta-(2,1)-trimmer throughout the period of active graminan ?
-
?

Organism

Organism UniProt Comment Textmining
Triticum aestivum
-
winter wheat
-

Purification (Commentary)

Purification (Comment) Organism
two isoforms 1-FEH w1 and w2 Triticum aestivum

Source Tissue

Source Tissue Comment Organism Textmining
stem comparison of activities during stem development Triticum aestivum
-

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
12.2
-
isoform 1-FEH w1 Triticum aestivum
14.6
-
isoform 1-FEH w1 Triticum aestivum

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
1,1-nystose + H2O 72% activity of isoform w1 and 83% of w2 in comparison to substrate 1-kestose Triticum aestivum beta-D-fructose + sucrose
-
?
1-kestose + H2O 100% activity of both isoforms w1 and w2 Triticum aestivum beta D-fructofuranose + sucrose
-
?
6-kestose + H2O 0.7% activity of isoform w1 and 1% of w2 in comparison to substrate 1-kestose Triticum aestivum beta-D-fructose + sucrose
-
?
inulin + H2O 39% activity of isoform w1 and 22% of w2 in comparison to substrate 1-kestose Triticum aestivum D-fructose + ?
-
?
levan + H2O 4% activity of isoform w1 and 3% of w2 in comparison to substrate 1-kestose Triticum aestivum D-fructose + ?
-
?
additional information the enzyme might play a role as a beta-(2,1)-trimmer throughout the period of active graminan Triticum aestivum ?
-
?
neokestose + H2O 4% activity of isoform w1 and 3% of w2 in comparison to substrate 1-kestose Triticum aestivum beta-D-fructose + sucrose
-
?

Subunits

Subunits Comment Organism
monomer 1 * 70000, SDS-PAGE Triticum aestivum

Synonyms

Synonyms Comment Organism
fructan 1-exohydrolase
-
Triticum aestivum

Temperature Optimum [°C]

Temperature Optimum [°C] Temperature Optimum Maximum [°C] Comment Organism
30 40 both isoforms w1 and w2 Triticum aestivum

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
4.5 5.5 both isoforms w1 and w2 Triticum aestivum

pH Stability

pH Stability pH Stability Maximum Comment Organism
7.5
-
above pH 7.5 the isoforms are inactive Triticum aestivum