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Literature summary for 3.2.1.62 extracted from

  • Leese, H.J.; Semenza, G.
    On the identity between the small intestine enzymes phlorizin hydrolase and glycosylceramidase (1973), J. Biol. Chem., 248, 8170-8173.
    View publication on PubMed

Inhibitors

Inhibitors Comment Organism Structure
cellobiose inhibition of galactosylceramide hydrolysis Rattus sp.
galactosylceramide competitive inhibition of glucosyldihydroceramide hydrolysis Rattus sp.
glucosyldihydroceramide competitive inhibition of galactosylceramide hydrolysis Rattus sp.
phlorizin competitive inhibition of galactosylceramide hydrolysis, Ki: 0.35 mM Rattus sp.

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
0.51
-
galactosylceramide
-
Rattus sp.
0.62
-
glucosyldihydroceramide
-
Rattus sp.

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
4-O-beta-D-galactopyranosyl-D-glucopyranoside + H2O Rattus sp. best substrate D-galactose + beta-D-glucose
-
?
4-O-beta-D-galactopyranosyl-D-glucopyranoside + H2O Rattus sp. two enzymatic activities, one for lactose- and one for phlorizin-and lactose-hydrolysis D-galactose + beta-D-glucose
-
?
4-O-beta-D-glucopyranosyl-D-glucose + H2O Rattus sp. cellobiose beta-D-glucose + D-glucose
-
?
phlorizin + H2O Rattus sp.
-
phloretin + beta-D-glucose
-
?

Organism

Organism UniProt Comment Textmining
Rattus sp.
-
-
-

Purification (Commentary)

Purification (Comment) Organism
-
Rattus sp.

Source Tissue

Source Tissue Comment Organism Textmining
intestine
-
Rattus sp.
-

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
20
-
-
Rattus sp.

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
4'-deoxyphlorizin + H2O low activity Rattus sp. 4'-deoxyphloritin + beta-D-glucose
-
?
4-O-beta-D-galactopyranosyl-D-glucopyranoside + H2O best substrate Rattus sp. D-galactose + beta-D-glucose
-
?
4-O-beta-D-galactopyranosyl-D-glucopyranoside + H2O two enzymatic activites, one for lactose- and one for phlorizin-and lactose-hydrolysis Rattus sp. D-galactose + beta-D-glucose
-
?
4-O-beta-D-galactopyranosyl-D-glucopyranoside + H2O two enzymatic activities, one for lactose- and one for phlorizin-and lactose-hydrolysis Rattus sp. D-galactose + beta-D-glucose
-
?
4-O-beta-D-glucopyranosyl-D-glucose + H2O cellobiose Rattus sp. beta-D-glucose + D-glucose
-
?
galactosyl-N-palmitoylceramide + H2O
-
Rattus sp. beta-D-galactose + N-palmitoylceramide
-
?
galactosyl-N-palmitoyldihydroceramide + H2O
-
Rattus sp. beta-D-galactose + N-palmitoyldihydroceramide
-
?
galactosylceramide + H2O
-
Rattus sp. beta-D-galactose + ceramide
-
?
glucosyl-N-lignoceroyldihydroceramide + H2O
-
Rattus sp. beta-D-glucose + N-lignoceroyldihydroceramide
-
?
glucosyl-N-palmitoylceramide + H2O
-
Rattus sp. beta-D-glucose + N-palmitoylceramide
-
?
glucosyl-N-palmitoyldihydroceramide + H2O
-
Rattus sp. beta-D-glucose + N-palmitoyldihydroceramide
-
?
glucosyl-N-stearoyldihydroceramide + H2O
-
Rattus sp. beta-D-glucose + N-stearoyldihydroceramide
-
?
glucosyldihydroceramide
-
Rattus sp. beta-D-glucose + dihydroceramide
-
?
lactosyl-N-lignoceroyldihydroceramide + H2O
-
Rattus sp. beta-D-glucose + D-galactose + N-lignoceroyldihydroceramide
-
?
lactosyl-N-palmitoyldihydroceramide + H2O
-
Rattus sp. beta-D-glucose + D-galactose + N-palmitoyldihydroceramide
-
?
lactosyl-N-stearoyldihydroceramide + H2O
-
Rattus sp. beta-glucose + D-galactose + N-stearoyldihydroceramide
-
?
phlorizin + H2O
-
Rattus sp. phloretin + beta-D-glucose
-
?

Temperature Stability [°C]

Temperature Stability Minimum [°C] Temperature Stability Maximum [°C] Comment Organism
46
-
34-70% remaining activity after 30 min, depending on substrates Rattus sp.

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
6
-
-
Rattus sp.