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Literature summary for 3.2.1.2 extracted from

  • Vikso-Nielsen, A.; Christensen, T.M.I.E.; Bojko, M.; Marcussen, J.
    Purification and characterization of beta-amylase from leaves of potato (Solanum tuberosum) (1997), Physiol. Plant., 99, 190-196.
No PubMed abstract available

Inhibitors

Inhibitors Comment Organism Structure
alpha-cyclodextrin
-
Solanum tuberosum
beta-cyclodextrin
-
Solanum tuberosum

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
0.73
-
p-nitrophenylmaltopentaoside
-
Solanum tuberosum

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
56000
-
2 * 56000, SDS-PAGE Solanum tuberosum
111000
-
gel filtration Solanum tuberosum

Organism

Organism UniProt Comment Textmining
Solanum tuberosum
-
-
-

Purification (Commentary)

Purification (Comment) Organism
-
Solanum tuberosum

Source Tissue

Source Tissue Comment Organism Textmining
leaf
-
Solanum tuberosum
-

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
5
-
-
Solanum tuberosum

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
amylopectin + H2O
-
Solanum tuberosum beta-maltose + ?
-
?
amylose + H2O
-
Solanum tuberosum beta-maltose
-
?
p-nitrophenyl alpha-D-glucopyranoside + H2O
-
Solanum tuberosum p-nitrophenol + D-glucose
-
?
p-nitrophenylmaltopentaoside + H2O
-
Solanum tuberosum ?
-
?
starch + H2O potato starch Solanum tuberosum maltose + ?
-
?

Subunits

Subunits Comment Organism
dimer 2 * 56000, SDS-PAGE Solanum tuberosum

Temperature Optimum [°C]

Temperature Optimum [°C] Temperature Optimum Maximum [°C] Comment Organism
40
-
hydrolysis of p-nitrophenylmaltopentaoside Solanum tuberosum

Temperature Stability [°C]

Temperature Stability Minimum [°C] Temperature Stability Maximum [°C] Comment Organism
40
-
unstable above Solanum tuberosum

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
6.5
-
hydrolysis of p-nitrophenylmaltopentaoside Solanum tuberosum