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EC Tree
IUBMB Comments The enzyme binds to chitin and randomly cleaves glycosidic linkages in chitin and chitodextrins in a non-processive mode, generating chitooligosaccharides and free ends on which exo-chitinases and exo-chitodextrinases can act. Activity is greatly stimulated in the presence of EC 1.14.99.53, lytic chitin monoxygenase, which attacks the crystalline structure of chitin and makes the polymer more accesible to the chitinase. cf. EC 3.2.1.202, endo-chitodextrinase.
The taxonomic range for the selected organisms is: Triticum aestivum The enzyme appears in selected viruses and cellular organisms
Synonyms
chitinase, chitotriosidase, endochitinase, antifreeze protein, chit1, amcase, chitinase a, exochitinase, acidic mammalian chitinase, class i chitinase,
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1,4-beta-poly-N-acetylglucosaminidase
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beta-1,4-poly-N-acetyl glucosamidinase
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chitodextrinase-N-
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Complement-fixation antigen
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poly-beta-glucosaminidase
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hydrolysis of O-glycosyl bond
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(1->4)-2-acetamido-2-deoxy-beta-D-glucan glycanohydrolase
The enzyme binds to chitin and randomly cleaves glycosidic linkages in chitin and chitodextrins in a non-processive mode, generating chitooligosaccharides and free ends on which exo-chitinases and exo-chitodextrinases can act. Activity is greatly stimulated in the presence of EC 1.14.99.53, lytic chitin monoxygenase, which attacks the crystalline structure of chitin and makes the polymer more accesible to the chitinase. cf. EC 3.2.1.202, endo-chitodextrinase.
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chitin + H2O
N,N-diacetylchitobiose + N-acetylglucosamine
chitohexaose + H2O
chitobiose + chitotriose
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?
chitopentaose + H2O
chitobiose + chitotriose
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?
chitosan + H2O
?
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?
chitosan + H2O
chitosan oligosaccharides
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reacetylated
from diacetylchitobiose to tetraacetylchitotetraose
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chitotetraose + H2O
N-acetylglucosamine + chitobiose + chitotriose
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tritiated
only traces of chitotriose and N-acetylglucosamine
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glycol chitin + H2O
N-acetylglucosamine + ?
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tritiated and unlabeled
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?
N,N',N''-triacetylchitotriose + H2O
N-acetylglucosamine + N,N'-diacetylchitobiose
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3H labelled, only slightly attacked
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?
additional information
?
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chitin + H2O
N,N-diacetylchitobiose + N-acetylglucosamine
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?
chitin + H2O
N,N-diacetylchitobiose + N-acetylglucosamine
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[acetyl-3H]chitin
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?
chitin + H2O
N,N-diacetylchitobiose + N-acetylglucosamine
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[acetyl-3H]chitin
chitobiose, biotriose and biotetraose from nascent chitin, higher oligosaccharides from preformed chitin
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additional information
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the class I chitinase inhibits the growth of Penicillium roquefortii, overview
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additional information
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the class I chitinase inhibits the growth of Penicillium roquefortii, overview
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additional information
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the class I chitinase inhibits the growth of Penicillium roquefortii, overview
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additional information
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the class I chitinase inhibits the growth of Penicillium roquefortii, overview
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additional information
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the class I chitinase inhibits the growth of Penicillium roquefortii, overview
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additional information
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the class I chitinase inhibits the growth of Penicillium roquefortii, overview
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additional information
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the class I chitinase inhibits the growth of Penicillium roquefortii, overview
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additional information
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the class I chitinase inhibits the growth of Penicillium roquefortii, overview
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additional information
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the class I chitinase inhibits the growth of Penicillium roquefortii, overview
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additional information
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the class I chitinase inhibits the growth of Penicillium roquefortii, overview
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additional information
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the class I chitinase inhibits the growth of Penicillium roquefortii, overview
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additional information
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the class I chitinase inhibits the growth of Penicillium roquefortii, overview
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additional information
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additional information
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the class I chitinase inhibits the growth of Penicillium roquefortii, overview
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additional information
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the class I chitinase inhibits the growth of Penicillium roquefortii, overview
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additional information
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the class I chitinase inhibits the growth of Penicillium roquefortii, overview
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?
additional information
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the class I chitinase inhibits the growth of Penicillium roquefortii, overview
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?
additional information
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the class I chitinase inhibits the growth of Penicillium roquefortii, overview
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additional information
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the class I chitinase inhibits the growth of Penicillium roquefortii, overview
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additional information
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the class I chitinase inhibits the growth of Penicillium roquefortii, overview
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?
additional information
?
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the class I chitinase inhibits the growth of Penicillium roquefortii, overview
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?
additional information
?
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the class I chitinase inhibits the growth of Penicillium roquefortii, overview
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?
additional information
?
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the class I chitinase inhibits the growth of Penicillium roquefortii, overview
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?
additional information
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the class I chitinase inhibits the growth of Penicillium roquefortii, overview
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?
additional information
?
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the class I chitinase inhibits the growth of Penicillium roquefortii, overview
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?
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diacetylchitobiose
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competitive inhibitor
N-acetylglucosamine
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poor competitor
pentaacetylchitopentaose
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competitive inhibitor
tetraacetylchitotetraose
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competitive inhibitor
triacetylchitotriose
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competitive inhibitor
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2
chitin
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chitin concentration calculated as N-acetylglucosamine
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14.6
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14.6
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calculated as N-acetylglucosamine
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7.6
two basic isoforms with pI values of 7.6 and 8.0
8
two basic isoforms with pI values of 7.6 and 8.0
7.6
two basic isoforms with pI values of 7.6 and 8.0
8
two basic isoforms with pI values of 7.6 and 8.0
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Chi
UniProt
brenda
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brenda
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brenda
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brenda
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Q41539_WHEAT
320
0
33602
TrEMBL
Secretory Pathway (Reliability: 1 )
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34000
x * 34000, SDS-PAGE
33000
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sedimentation equilibrium
34000
x * 34000, SDS-PAGE
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monomer
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1 * 30000, SDS-PAGE
additional information
determination of the primary structure by mass spectrometry, sequence comparisons, overview
additional information
determination of the primary structure by mass spectrometry, sequence comparisons, overview
additional information
determination of the primary structure by mass spectrometry, sequence comparisons, overview
additional information
determination of the primary structure by mass spectrometry, sequence comparisons, overview
additional information
determination of the primary structure by mass spectrometry, sequence comparisons, overview
additional information
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determination of the primary structure by mass spectrometry, sequence comparisons, overview
additional information
determination of the primary structure by mass spectrometry, sequence comparisons, overview
additional information
determination of the primary structure by mass spectrometry, sequence comparisons, overview
additional information
determination of the primary structure by mass spectrometry, sequence comparisons, overview
additional information
determination of the primary structure by mass spectrometry, sequence comparisons, overview
additional information
determination of the primary structure by mass spectrometry, sequence comparisons, overview
additional information
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determination of the primary structure by mass spectrometry, sequence comparisons, overview
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-20°C or 2°C, several weeks, no loss of activity
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-20°C, 0.02% azide, several weeks, no loss of activity
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-80°C, 7 years, no loss of activity
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2°C, 0.02% azide, several weeks, no loss of activity
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to homogeneity, 300fold
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Cabib, E.
Endochitinase from wheat germ
Methods Enzymol.
161
498-501
1988
Triticum aestivum
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brenda
Cabib, E.
Assay for chitinase using tritiated chitin
Methods Enzymol.
161
424-426
1988
Serratia marcescens, Triticum aestivum
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brenda
Boller, T.; Mauch, F.
Colorimetric assay for chitinase
Methods Enzymol.
161
430-435
1988
Triticum aestivum
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brenda
Molano, J.; Polacheck, I.; Duran, A.; Cabib, E.
An endochitinase from wheat germ. Activity on nascent and preformed chitin
J. Biol. Chem.
254
4901-4907
1979
Triticum aestivum
brenda
Soerensen, H.P.; Madsen, L.S.; Petersen, J.; Andersen, J.T.; Hansen, A.M.; Beck, H.C.
Oat (Avena sativa) seed extract as an antifungal food preservative through the catalytic activity of a highly abundant class I chitinase
Appl. Biochem. Biotechnol.
160
1573-1584
2009
Hordeum vulgare (P11955), Hordeum vulgare (Q42839), Hordeum vulgare, Avena sativa (P86181), Triticum aestivum (Q41539), Triticum aestivum (Q6T484), Triticum aestivum (Q8W427), Triticum aestivum (Q8W428), Triticum aestivum (Q9XEN6), Triticum aestivum, Secale cereale (Q9AXR9), Secale cereale (Q9FRV1), Secale cereale
brenda