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Literature summary for 3.2.1.139 extracted from

  • Nagy, T.; Emami, K.; Fontes, C.M.; Ferreira, L.M.; Humphry, D.R.; Gilbert, H.J.
    The membrane-bound alpha-glucuronidase from Pseudomonas cellulosa hydrolyzes 4-O-methyl-D-glucuronoxylooligosaccharides but not 4-O-methyl-D-glucuronoxylan (2002), J. Bacteriol., 184, 4925-4929.
    View publication on PubMedView publication on EuropePMC

General Stability

General Stability Organism
susceptible to proteinase attack, inactivation by trypsin is similar to the inactivation rate for the intracellular enzyme malate dehydrogenase Cellvibrio japonicus

Localization

Localization Comment Organism GeneOntology No. Textmining
membrane
-
Cellvibrio japonicus 16020
-

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
150000
-
gel filtration Cellvibrio japonicus

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
additional information Cellvibrio japonicus the role of the glucuronidase, in combination with cell-associated xylanases could be to hydrolyze decorated xylooligosaccharides, generated by extracellular hemicellulases, to xylose and 4-O-methyl-D-glucuronic acid, enabling the pseudomonad to preferentially utilize the sugars derived from these polymers ?
-
?

Organism

Organism UniProt Comment Textmining
Cellvibrio japonicus B3PC73
-
-
Cellvibrio mixtus Q8VP73
-
-

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
4-O-methyl-D-glucuronoxylan + H2O
-
Cellvibrio japonicus 4-O-methyl-D-glucuronic acid + xylan
-
?
aldobiouronic acid + H2O
-
Cellvibrio japonicus ?
-
?
aldopentaouronic acid + H2O
-
Cellvibrio japonicus ?
-
?
aldotetraouronic acid + H2O
-
Cellvibrio japonicus ?
-
?
aldotriouronic acid + H2O
-
Cellvibrio japonicus 4-O-methyl-alpha-D-glucuronic acid + Xylbeta(1-4)Xylbeta(1-4)Xyl
-
?
additional information the role of the glucuronidase, in combination with cell-associated xylanases could be to hydrolyze decorated xylooligosaccharides, generated by extracellular hemicellulases, to xylose and 4-O-methyl-D-glucuronic acid, enabling the pseudomonad to preferentially utilize the sugars derived from these polymers Cellvibrio japonicus ?
-
?

Subunits

Subunits Comment Organism
dimer
-
Cellvibrio japonicus

Temperature Stability [°C]

Temperature Stability Minimum [°C] Temperature Stability Maximum [°C] Comment Organism
55
-
rapid inactivation above Cellvibrio japonicus

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
6.3
-
-
Cellvibrio japonicus

pH Range

pH Minimum pH Maximum Comment Organism
5 8 pH 5: 20% of maximal activity, pH 8: about 60% of maximal activity Cellvibrio japonicus