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Enzyme Nomenclature
Information on EC 3.2.1.187 - (Ara-f)3-Hyp beta-L-arabinobiosidase
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The expected taxonomic range for this enzyme is: Bifidobacterium longum
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EC NUMBER 
COMMENTARY 
3.2.1.187
-
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RECOMMENDED NAME
GeneOntology No.
(Ara-f)3-Hyp beta-L-arabinobiosidase
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REACTION
REACTION DIAGRAM
COMMENTARY
ORGANISM
UNIPROT
LITERATURE
4-O-(beta-L-arabinofuranosyl-(1->2)-beta-L-arabinofuranosyl-(1->2)-beta-L-arabinofuranosyl)-(2S,4S)-4-hydroxyproline + H2O = 4-O-(beta-L-arabinofuranosyl)-(2S,4S)-4-hydroxyproline + beta-L-arabinofuranosyl-(1->2)-beta-L-arabinofuranose
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-
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SYSTEMATIC NAME
IUBMB Comments
4-O-(beta-L-arabinofuranosyl-(1->2)-beta-L-arabinofuranosyl-(1->2)-beta-L-arabinofuranosyl)-(2S,4S)-4-hydroxyproline beta-L-arabinofuranosyl-(1->2)-beta-L-arabinofuranose hydrolase
The enzyme, which was identified in the bacterium Bifidobacterium longum JCM1217, is specific for (Ara-f)3-Hyp, a sugar chain found in hydroxyproline-rich glyoproteins such as extensin and lectin. The enzyme was not able to accept (Ara-f)2-Hyp or (Ara-f)4-Hyp as substrates. In the presence of 1-alkanols, the enzyme demonstrates transglycosylation activity, retaining the anomeric configuration of the arabinofuranose residue.
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ORGANISM
COMMENTARY
LITERATURE
UNIPROT
SEQUENCE DB
SOURCE
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GENERAL INFORMATION
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
metabolism
metabolism
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the enzyme plays a key role in Bifidobacterium longum for beta-L-arabinooligosaccharides usage
metabolism
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the enzyme plays a key role in Bifidobacterium longum for beta-L-arabinooligosaccharides usage
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SUBSTRATE
PRODUCT
REACTION DIAGRAM
ORGANISM
UNIPROT
COMMENTARY
(Substrate)
(Substrate)
LITERATURE
(Substrate)
(Substrate)
COMMENTARY
(Product)
(Product)
LITERATURE
(Product)
(Product)
Reversibility
r=reversible
ir=irreversible
?=not specified
r=reversible
ir=irreversible
?=not specified
4-O-(beta-L-arabinofuranosyl-(1->2)-beta-L-arabinofuranosyl-(1->2)-beta-L-arabinofuranosyl)-(2S,4S)-4-hydroxyproline + H2O
4-O-(beta-L-arabinofuranosyl)-(2S,4S)-4-hydroxyproline + beta-L-arabinofuranosyl-(1->2)-beta-L-arabinofuranose
4-O-(beta-L-arabinofuranosyl-(1->2)-beta-L-arabinofuranosyl-(1->2)-beta-L-arabinofuranosyl)-(2S,4S)-4-hydroxyproline + H2O
4-O-(beta-L-arabinofuranosyl)-(2S,4S)-4-hydroxyproline + beta-L-arabinofuranosyl-(1->2)-beta-L-arabinofuranose
-
-
-
-
?
4-O-(beta-L-arabinofuranosyl-(1->2)-beta-L-arabinofuranosyl-(1->2)-beta-L-arabinofuranosyl)-(2S,4S)-4-hydroxyproline + H2O
4-O-(beta-L-arabinofuranosyl)-(2S,4S)-4-hydroxyproline + beta-L-arabinofuranosyl-(1->2)-beta-L-arabinofuranose
-
specific substrate
-
-
?
4-O-(beta-L-arabinofuranosyl-(1->2)-beta-L-arabinofuranosyl-(1->2)-beta-L-arabinofuranosyl)-(2S,4S)-4-hydroxyproline + H2O
4-O-(beta-L-arabinofuranosyl)-(2S,4S)-4-hydroxyproline + beta-L-arabinofuranosyl-(1->2)-beta-L-arabinofuranose
-
specific substrate
-
-
?
4-O-(beta-L-arabinofuranosyl-(1->2)-beta-L-arabinofuranosyl-(1->2)-beta-L-arabinofuranosyl)-(2S,4S)-4-hydroxyproline + H2O
4-O-(beta-L-arabinofuranosyl)-(2S,4S)-4-hydroxyproline + beta-L-arabinofuranosyl-(1->2)-beta-L-arabinofuranose
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-
-
-
?
additional information
?
-
-
no activity with 4-nitrophenyl alpha-L-arabinofuranoside, 4-nitrophenyl alpha-L-arabinopyranoside, 4-nitrophenyl beta-L-arabinopyranoside, arabinoxylan, rhamnogalacturonan, 4-O-(beta-L-arabinofuranosyl-(1->2)-beta-L-arabinofuranosyl)-(2S,4S)-4-hydroxyproline and 4-O-(beta-L-arabinofuranosyl-(1->2)-beta-L-arabinofuranosyl)-(1->2)-(beta-L-arabinofuranosyl)-(1->2)-(beta-L-arabinofuranosyl)-(2S,4S)-4-hydroxyproline
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-
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additional information
?
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no activity with 4-nitrophenyl alpha-L-arabinofuranoside, 4-nitrophenyl alpha-L-arabinopyranoside, 4-nitrophenyl beta-L-arabinopyranoside, arabinoxylan, rhamnogalacturonan, 4-O-(beta-L-arabinofuranosyl-(1->2)-beta-L-arabinofuranosyl)-(2S,4S)-4-hydroxyproline and 4-O-(beta-L-arabinofuranosyl-(1->2)-beta-L-arabinofuranosyl)-(1->2)-(beta-L-arabinofuranosyl)-(1->2)-(beta-L-arabinofuranosyl)-(2S,4S)-4-hydroxyproline
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-
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NATURAL SUBSTRATES
NATURAL PRODUCTS
REACTION DIAGRAM
ORGANISM
UNIPROT
COMMENTARY
(Substrate)
(Substrate)
LITERATURE
(Substrate)
(Substrate)
COMMENTARY
(Product)
(Product)
LITERATURE
(Product)
(Product)
REVERSIBILITY
r=reversible
ir=irreversible
?=not specified
r=reversible
ir=irreversible
?=not specified
4-O-(beta-L-arabinofuranosyl-(1->2)-beta-L-arabinofuranosyl-(1->2)-beta-L-arabinofuranosyl)-(2S,4S)-4-hydroxyproline + H2O
4-O-(beta-L-arabinofuranosyl)-(2S,4S)-4-hydroxyproline + beta-L-arabinofuranosyl-(1->2)-beta-L-arabinofuranose
4-O-(beta-L-arabinofuranosyl-(1->2)-beta-L-arabinofuranosyl-(1->2)-beta-L-arabinofuranosyl)-(2S,4S)-4-hydroxyproline + H2O
4-O-(beta-L-arabinofuranosyl)-(2S,4S)-4-hydroxyproline + beta-L-arabinofuranosyl-(1->2)-beta-L-arabinofuranose
-
-
-
-
?
4-O-(beta-L-arabinofuranosyl-(1->2)-beta-L-arabinofuranosyl-(1->2)-beta-L-arabinofuranosyl)-(2S,4S)-4-hydroxyproline + H2O
4-O-(beta-L-arabinofuranosyl)-(2S,4S)-4-hydroxyproline + beta-L-arabinofuranosyl-(1->2)-beta-L-arabinofuranose
-
specific substrate
-
-
?
4-O-(beta-L-arabinofuranosyl-(1->2)-beta-L-arabinofuranosyl-(1->2)-beta-L-arabinofuranosyl)-(2S,4S)-4-hydroxyproline + H2O
4-O-(beta-L-arabinofuranosyl)-(2S,4S)-4-hydroxyproline + beta-L-arabinofuranosyl-(1->2)-beta-L-arabinofuranose
-
specific substrate
-
-
?
4-O-(beta-L-arabinofuranosyl-(1->2)-beta-L-arabinofuranosyl-(1->2)-beta-L-arabinofuranosyl)-(2S,4S)-4-hydroxyproline + H2O
4-O-(beta-L-arabinofuranosyl)-(2S,4S)-4-hydroxyproline + beta-L-arabinofuranosyl-(1->2)-beta-L-arabinofuranose
-
-
-
-
?
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METALS and IONS
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
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INHIBITORS
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
IMAGE
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KM VALUE [mM]
SUBSTRATE
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
IMAGE
0.0107
4-O-(beta-L-arabinofuranosyl-(1->2)-beta-L-arabinofuranosyl-(1->2)-beta-L-arabinofuranosyl)-(2S,4S)-4-hydroxyproline
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in 50 mM sodium acetate (pH 6.0), at 37°C
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TURNOVER NUMBER [1/s]
SUBSTRATE
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
IMAGE
2.7
4-O-(beta-L-arabinofuranosyl-(1->2)-beta-L-arabinofuranosyl-(1->2)-beta-L-arabinofuranosyl)-(2S,4S)-4-hydroxyproline
Bifidobacterium longum
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in 50 mM sodium acetate (pH 6.0), at 37°C
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pH OPTIMUM
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
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TEMPERATURE OPTIMUM
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
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PDB
SCOP
CATH
ORGANISM
UNIPROT
Bacteroides thetaiotaomicron (strain ATCC 29148 / DSM 2079 / NCTC 10582 / E50 / VPI-5482)
Bacteroides thetaiotaomicron (strain ATCC 29148 / DSM 2079 / NCTC 10582 / E50 / VPI-5482)
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MOLECULAR WEIGHT
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
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SUBUNITS
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
?
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x * 156797, calculated from amino acid sequence; x * 157000, SDS-PAGE
?
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x * 156797, calculated from amino acid sequence; x * 157000, SDS-PAGE
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Purification/COMMENTARY
ORGANISM
UNIPROT
LITERATURE
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Cloned/COMMENTARY
ORGANISM
UNIPROT
LITERATURE
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LINKS TO OTHER DATABASES (specific for EC-Number 3.2.1.187)
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