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Literature summary extracted from

  • Muzard, M.; Aubry, N.; Plantier-Royon, R.; ODonohue, M.; Remond, C.
    Evaluation of the transglycosylation activities of a GH 39 beta-D-xylosidase for the synthesis of xylose-based glycosides (2009), J. Mol. Catal. B, 58, 1-5.
No PubMed abstract available

KM Value [mM]

EC Number KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
3.2.1.37 8.61
-
4-nitrophenyl-beta-D-xylopyranoside 45°C Halalkalibacterium halodurans
3.2.1.37 37.3
-
xylotriose 45°C Halalkalibacterium halodurans
3.2.1.37 80.14
-
xylobiose 45°C Halalkalibacterium halodurans

Organism

EC Number Organism UniProt Comment Textmining
3.2.1.37 Halalkalibacterium halodurans
-
isoform xylB
-

Substrates and Products (Substrate)

EC Number Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
3.2.1.37 4-nitrophenyl beta-D-xylopyranoside + H2O
-
Halalkalibacterium halodurans 4-nitrophenol + beta-D-xylose
-
?
3.2.1.37 additional information enzyme has transxylosylation activity leading to formation of O-glycosidic linkages as in 4-nitrophenyl-3-O-beta-D-xylopyranosyl-beta-D-xylopyranoside, 4-nitrophenyl-2-O-beta-D-xylopyranosyl-beta-D-xylopyranoside, 4-nitrophenyl-(4-O-beta-D-xylopyranosyl-2-O-beta-D-xylopyranosyl)-beta-D-xylopyranoside from substrate 4-nitrophenyl-beta-D-xylopyranoside. Compared to xylobiose, xylotriose is a better donor molecule for XylB-mediated transxylosylation of primary alcohols presenting chain length from 1- to 5-carbon atoms Halalkalibacterium halodurans ?
-
?
3.2.1.37 wheat bran + H2O
-
Halalkalibacterium halodurans D-xylose + ?
-
?
3.2.1.37 xylobiose + H2O
-
Halalkalibacterium halodurans 2 D-xylose
-
?
3.2.1.37 xylotriose + H2O
-
Halalkalibacterium halodurans 3 D-xylose
-
?

Turnover Number [1/s]

EC Number Turnover Number Minimum [1/s] Turnover Number Maximum [1/s] Substrate Comment Organism Structure
3.2.1.37 0.32
-
xylobiose 45°C Halalkalibacterium halodurans
3.2.1.37 4.91
-
xylotriose 45°C Halalkalibacterium halodurans
3.2.1.37 5.26
-
4-nitrophenyl-beta-D-xylopyranoside 45°C Halalkalibacterium halodurans

kcat/KM [mM/s]

EC Number kcat/KM Value [1/mMs-1] kcat/KM Value Maximum [1/mMs-1] Substrate Comment Organism Structure
3.2.1.37 0.004
-
xylobiose 45°C Halalkalibacterium halodurans
3.2.1.37 0.132
-
xylotriose 45°C Halalkalibacterium halodurans
3.2.1.37 0.6
-
4-nitrophenyl-beta-D-xylopyranoside 45°C Halalkalibacterium halodurans