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Information on EC 3.2.1.14 - chitinase and Organism(s) Triticum aestivum and UniProt Accession Q41539

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EC Tree
     3 Hydrolases
         3.2 Glycosylases
             3.2.1 Glycosidases, i.e. enzymes that hydrolyse O- and S-glycosyl compounds
                3.2.1.14 chitinase
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.
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Triticum aestivum
UNIPROT: Q41539
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Word Map
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, more
SYNONYM
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
class I chitinase
-
1,4-beta-poly-N-acetylglucosaminidase
-
-
-
-
beta-1,4-poly-N-acetyl glucosamidinase
-
-
-
-
CF-AG
-
-
-
-
CF-antigen
-
-
-
-
CHI-26
-
-
-
-
CHIT 1A
-
-
-
-
CHIT 1B
-
-
-
-
chitodextrinase-N-
-
-
-
-
Complement-fixation antigen
-
-
-
-
endochitinase
-
-
-
-
MF1 antigen
-
-
-
-
poly-beta-glucosaminidase
-
-
-
-
UDA
-
-
-
-
REACTION TYPE
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
hydrolysis of O-glycosyl bond
-
-
-
-
PATHWAY SOURCE
PATHWAYS
-
-, -, -
SYSTEMATIC NAME
IUBMB Comments
(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.
CAS REGISTRY NUMBER
COMMENTARY hide
9001-06-3
-
SUBSTRATE
PRODUCT                       
REACTION DIAGRAM
ORGANISM
UNIPROT
COMMENTARY
(Substrate) hide
LITERATURE
(Substrate)
COMMENTARY
(Product) hide
LITERATURE
(Product)
Reversibility
r=reversible
ir=irreversible
?=not specified
chitin + H2O
N,N-diacetylchitobiose + N-acetylglucosamine
show the reaction diagram
chitohexaose + H2O
chitobiose + chitotriose
show the reaction diagram
-
-
-
?
chitopentaose + H2O
chitobiose + chitotriose
show the reaction diagram
-
-
-
?
chitosan + H2O
?
show the reaction diagram
-
-
-
-
?
chitosan + H2O
chitosan oligosaccharides
show the reaction diagram
-
reacetylated
from diacetylchitobiose to tetraacetylchitotetraose
?
chitotetraose + H2O
N-acetylglucosamine + chitobiose + chitotriose
show the reaction diagram
-
tritiated
only traces of chitotriose and N-acetylglucosamine
?
glycol chitin + H2O
N-acetylglucosamine + ?
show the reaction diagram
-
tritiated and unlabeled
-
-
?
N,N',N''-triacetylchitotriose + H2O
N-acetylglucosamine + N,N'-diacetylchitobiose
show the reaction diagram
-
3H labelled, only slightly attacked
-
?
additional information
?
-
NATURAL SUBSTRATE
NATURAL PRODUCT
REACTION DIAGRAM
ORGANISM
UNIPROT
COMMENTARY
(Substrate) hide
LITERATURE
(Substrate)
COMMENTARY
(Product) hide
LITERATURE
(Product)
REVERSIBILITY
r=reversible
ir=irreversible
?=not specified
additional information
?
-
INHIBITOR
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
IMAGE
diacetylchitobiose
-
competitive inhibitor
N-acetylglucosamine
-
poor competitor
pentaacetylchitopentaose
-
competitive inhibitor
tetraacetylchitotetraose
-
competitive inhibitor
triacetylchitotriose
-
competitive inhibitor
KM VALUE [mM]
SUBSTRATE
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
IMAGE
2
chitin
-
chitin concentration calculated as N-acetylglucosamine
SPECIFIC ACTIVITY [µmol/min/mg]
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
pH RANGE
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
3
-
75% activity
9
-
53% activity
TEMPERATURE OPTIMUM
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
pI VALUE
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
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
ORGANISM
COMMENTARY hide
LITERATURE
UNIPROT
SEQUENCE DB
SOURCE
Chi
UniProt
Manually annotated by BRENDA team
SOURCE TISSUE
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
SOURCE
UNIPROT
ENTRY NAME
ORGANISM
NO. OF AA
NO. OF TRANSM. HELICES
MOLECULAR WEIGHT[Da]
SOURCE
SEQUENCE
LOCALIZATION PREDICTION?
Q41539_WHEAT
320
0
33602
TrEMBL
Secretory Pathway (Reliability: 1)
MOLECULAR WEIGHT
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
34000
x * 34000, SDS-PAGE
29000
-
gel filtration
30000
-
SDS-PAGE
33000
-
sedimentation equilibrium
34000
x * 34000, SDS-PAGE
SUBUNIT
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
monomer
-
1 * 30000, SDS-PAGE
additional information
STORAGE STABILITY
ORGANISM
UNIPROT
LITERATURE
-20°C or 2°C, several weeks, no loss of activity
-
-20°C, 0.02% azide, several weeks, no loss of activity
-
-80°C, 7 years, no loss of activity
-
2°C, 0.02% azide, several weeks, no loss of activity
-
PURIFICATION (Commentary)
ORGANISM
UNIPROT
LITERATURE
to homogeneity, 300fold
-
REF.
AUTHORS
TITLE
JOURNAL
VOL.
PAGES
YEAR
ORGANISM (UNIPROT)
PUBMED ID
SOURCE
Cabib, E.
Endochitinase from wheat germ
Methods Enzymol.
161
498-501
1988
Triticum aestivum
-
Manually annotated by BRENDA team
Cabib, E.
Assay for chitinase using tritiated chitin
Methods Enzymol.
161
424-426
1988
Serratia marcescens, Triticum aestivum
-
Manually annotated by BRENDA team
Boller, T.; Mauch, F.
Colorimetric assay for chitinase
Methods Enzymol.
161
430-435
1988
Triticum aestivum
-
Manually annotated by BRENDA team
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
Manually annotated by BRENDA team
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
Manually annotated by BRENDA team