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discounted EARLY registration ends Dec 31, 2014
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discounted EARLY registration ends Dec 31, 2014
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MetaCyc Enzyme: alditol oxidase

Gene: xyoA Accession Number: G-11032 (MetaCyc)

Species: Streptomyces sp. IKD472/FERM P-14339

Summary:
Streptomyces sp. IKD472/FERM P-14339 is a thermophile isolated from a hot spring. An alditol oxidase was purified from the organism,and found to be a monomeric protein of 43 kDa [Yamashita00]. The enzyme bound one mole of FAD as a coenzyme per mole of protein, and its preferred substrate was xylitol, although it could catalyze the oxidation of other alditols, such as galactitol, D-sorbitol, D-arabitol and D-mannitol, with lower efficiency.

The xyoA gene encoding the enzyme was identified, isolated,and overexpressed in Escherichia coli [Yamashita00].

Molecular Weight of Polypeptide: 44.732 kD (from nucleotide sequence), 43.0 kD (experimental) [Yamashita00 ]

Unification Links: Protein Model Portal:Q9KX73 , SMR:Q9KX73 , UniProt:Q9KX73

Relationship Links: Entrez-Nucleotide:PART-OF:D89822 , InterPro:IN-FAMILY:IPR006094 , InterPro:IN-FAMILY:IPR007173 , InterPro:IN-FAMILY:IPR016166 , InterPro:IN-FAMILY:IPR016167 , InterPro:IN-FAMILY:IPR016169 , Pfam:IN-FAMILY:PF01565 , Pfam:IN-FAMILY:PF04030 , Prosite:IN-FAMILY:PS00862 , Prosite:IN-FAMILY:PS51387

Gene-Reaction Schematic: ?

Instance reactions of [a sugar alcohol + oxygen → an aldose + hydrogen peroxide] (1.1.3.41):
i1: D-mannitol + oxygen → aldehydo-D-mannose + hydrogen peroxide (1.1.3.40)

i2: xylitol + oxygen → α-D-xylopyranose + hydrogen peroxide (1.1.3.41)

Credits:
Created 11-Dec-2008 by Caspi R , SRI International


Enzymatic reaction of: xylitol oxidase (alditol oxidase)

EC Number: 1.1.3.41

xylitol + oxygen <=> α-D-xylopyranose + hydrogen peroxide

The reaction direction shown, that is, A + B ↔ C + D versus C + D ↔ A + B, is in accordance with the Enzyme Commission system.

The reaction is physiologically favored in the direction shown.

Alternative Substrates for xylitol: D-mannitol [Yamashita00 ] , D-arabitol [Yamashita00 ] , galactitol [Yamashita00 ] , D-sorbitol [Yamashita00 ]

Cofactors or Prosthetic Groups: FAD [Yamashita00]

Kinetic Parameters:

Substrate
Km (μM)
Citations
xylitol
680.0
[Yamashita00]


Enzymatic reaction of: alditol oxidase

EC Number: 1.1.3.41

a sugar alcohol + oxygen <=> an aldose + hydrogen peroxide

The reaction direction shown, that is, A + B ↔ C + D versus C + D ↔ A + B, is in accordance with the Enzyme Commission system.

The reaction is physiologically favored in the direction shown.

Cofactors or Prosthetic Groups: FAD [Yamashita00]

T(opt): 55 °C [Yamashita00]

pH(opt): 7.5 [Yamashita00]


References

Yamashita00: Yamashita M, Omura H, Okamoto E, Furuya Y, Yabuuchi M, Fukahi K, Murooka Y (2000). "Isolation, characterization, and molecular cloning of a thermostable xylitol oxidase from Streptomyces sp. IKD472." J Biosci Bioeng 89(4);350-60. PMID: 16232758


Report Errors or Provide Feedback
Please cite the following article in publications resulting from the use of MetaCyc: Caspi et al, Nucleic Acids Research 42:D459-D471 2014
Page generated by SRI International Pathway Tools version 18.5 on Sun Dec 21, 2014, BIOCYC13B.