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Literature summary for 3.2.1.117 extracted from

  • Li, C.P.; Swain, E.; Poulton, J.E.
    Prunus serotina amygdalin hydrolase and prunasin hydrolase. Purification, N-terminal sequencing, and antibody production (1992), Plant Physiol., 100, 282-290.
    View publication on PubMedView publication on EuropePMC

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
1.65
-
(R)-amygdalin AH II' Prunus serotina
1.88
-
(R)-amygdalin AH II Prunus serotina
2.01
-
(R)-amygdalin AH I Prunus serotina
2.2
-
(R)-amygdalin AH I' Prunus serotina

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
52000
-
all isoforms, gel filtration Prunus serotina
60000
-
all isoforms, SDS-PAGE Prunus serotina

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
(R)-amygdalin + H2O Prunus serotina first step of cyanogenesis from amygdalin (R)-prunasin + D-glucose
-
?

Organism

Organism UniProt Comment Textmining
Prunus serotina
-
Ehrh., black cherry
-

Posttranslational Modification

Posttranslational Modification Comment Organism
glycoprotein
-
Prunus serotina

Purification (Commentary)

Purification (Comment) Organism
four isoforms Prunus serotina

Reaction

Reaction Comment Organism Reaction ID
(R)-amygdalin + H2O = (R)-prunasin + D-glucose four isoforms found, AH I, AH I', AH II, AH II' Prunus serotina

Source Tissue

Source Tissue Comment Organism Textmining
seed
-
Prunus serotina
-

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
0.45
-
purified AH II' Prunus serotina
0.48
-
purified AH I' and AH II Prunus serotina
0.58
-
purified AH I Prunus serotina

Storage Stability

Storage Stability Organism
4°C, 10 mM histidine-HCl buffer, pH 6.0 Prunus serotina

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
(R)-amygdalin + H2O
-
Prunus serotina (R)-prunasin + D-glucose
-
?
(R)-amygdalin + H2O first step of cyanogenesis from amygdalin Prunus serotina (R)-prunasin + D-glucose
-
?

Subunits

Subunits Comment Organism
monomer 1 * 60000, SDS-PAGE Prunus serotina

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
4.5 5.5 all isoforms Prunus serotina