1.14.99.B10: lytic xyloglucan monooxygenase
This is an abbreviated version!
For detailed information about lytic xyloglucan monooxygenase, go to the full flat file.
Reaction
oxidative cleavage of xyloglucan, cleaving at any position along the beta-glucan backbone, oxidizing at C1 or C4 of D-glucose =
Synonyms
AA9A, endoglucanase II, FG02202.1, gh61-3, GH61–3, LPMO9A, LPMO9C, LPMO9D, Lpmo9H, NCU02916, PODANS_4_1020
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1.14.99.B10 lytic xyloglucan monooxygenaseAdvanced search results
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results (Substrates Products
Substrates Products on EC 1.14.99.B10 - lytic xyloglucan monooxygenase
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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
barely beta-glucan + ascorbate + O2
? + dehydroascorbate + H2O
-
dominance of products increasing by three sugars in size, i.e., DP4, DP7, DP10, DP13, and so forth
-
?
carboxymethyl cellulose + dithiothreitol + O2
carboxymethyl cellooligosaccharides + dithiothreitol disulfide + H2O
cellohexaose + hydroquinone + O2
oxidized cellobiose + oxidized cellotriose + benzoquinone + H2O
cellopentaose + hydroquinone + O2
oxidized cellobiose + oxidized cellotriose + benzoquinone + H2O
cellulose + dithiothreitol + O2
oligosaccharides + dithiothreitol disulfide + H2O
-
-
-
?
glucomannan + dithiothreitol + O2
cellooligosaccharides + dithiothreitol disulfide + H2O
-
minor activity on glucomannan
-
?
glucomannan + xylan + ascorbic acid + O2
? + dehydroascorbate + H2O
-
-
-
?
low molecular lignin + ascorbate + O2
? + dehydroascorbate + H2O
-
-
-
?
mixed-linkage glucan + ascorbate + O2
? + dehydroascorbate + H2O
-
-
-
-
?
phosphoric acid swollen cellulose + ascorbate + O2
cellooligosaccharides + dehydroascorbate + H2O
phosphoric acid swollen cellulose + ascorbic acid + O2
? + dehydroascorbic acid + H2O
-
-
-
?
reduced xyloglucan oligosaccharide + ascorbic acid + O2
xyloglucan oligosaccharides + dehydroascorbic acid + H2O
pure xyloglucan oligosaccharide with DP14
-
-
?
steam-exploded spruce + ascorbate + O2
oligosaccharides + dehydroascorbate + H2O
-
products display a degree of polymerization of DP2 and DP3
-
?
tamarind xyloglucan + ascorbate + O2
xylooligosaccharides + dehydroascorbate + H2O
-
products are mostly oligosaccharides having degrees of polymerization of 6 and 7
-
?
tamarind xyloglucan + ascorbic acid + O2
? + dehydroascorbic acid + H2O
-
-
-
?
thio-linked cello-oligosaccharides + ascorbate + O2
? + dehydroascorbate + H2O
with a degree of polymerization of 2–5
-
-
?
thio-linked xylopentaose + ascorbate + O2
? + dehydroascorbate + H2O
-
-
-
?
XXXGXXXG + ascorbate + O2
? + dehydroascorbate + H2O
branched substrate, G represents an unbranched beta-(1->4)-linked glucosyl residue and X represents beta-(1->4)-linked Glc bearing an alpha-(1->6)-linked xylosyl branch
cleavage generates a gem-diol at the non-reducing end
-
?
xyloglucan + dithiothreitol + O2
xyloglucan oligosaccharides + dithiothreitol disulfide + H2O
enzyme acts preferentially on free xyloglucan with release of a broad range of xyloglucan oligosaccharides
-
-
?
xyloglucan 14-mer + ascorbate + O2
? + dehydroascorbate + H2O
-
LPMO9C cuts at the nonreducing end of the intermediate G-unit of a reduced 14-mer derived from tamarind xyloglucan mainly containing XXXGXXXGOH and produces GoxXXXGOH
-
?
xylogluco-oligosaccharides + ascorbate + O2
? + dehydroascorbate + H2O
-
-
-
?
avicel + ascorbate + O2
oligosaccharides + dehydroascorbate + H2O
-
products display a degree of polymerization of DP2 and DP3
-
?
avicel + ascorbate + O2
oligosaccharides + dehydroascorbate + H2O
-
products display a degree of polymerization of DP2 and DP3
-
?
barley mixed-linkage beta-glucan + ascorbate + O2
? + dehydroascorbate + H2O
-
most abundant products show a degree of polymerization of 2-4
-
?
barley mixed-linkage beta-glucan + ascorbate + O2
? + dehydroascorbate + H2O
-
most abundant products show a degree of polymerization of 2-4
-
?
carboxymethyl cellulose + dithiothreitol + O2
carboxymethyl cellooligosaccharides + dithiothreitol disulfide + H2O
-
-
-
?
carboxymethyl cellulose + dithiothreitol + O2
carboxymethyl cellooligosaccharides + dithiothreitol disulfide + H2O
reaction is slower with electron donor dithiothreitol than with ascorbate. Reaction is 5- to 10fold slower with carboxymethyl cellulose than with xyloglucan
-
-
?
carboxymethyl cellulose + dithiothreitol + O2
carboxymethyl cellooligosaccharides + dithiothreitol disulfide + H2O
reaction is slower with electron donor dithiothreitol than with ascorbate. Reaction is 5- to 10fold slower with carboxymethyl cellulose than with xyloglucan
-
-
?
cello-oligosaccharides + ascorbate + O2
? + dehydroascorbate + H2O
with a degree of polymerization of 5 and 7
-
-
?
cello-oligosaccharides + ascorbate + O2
? + dehydroascorbate + H2O
-
with a degree of polymerization of 5 and 7
-
-
?
cellohexaose + hydroquinone + O2
oxidized cellobiose + oxidized cellotriose + benzoquinone + H2O
-
cellohexaose yields both DP2 and DP3 oxidized species
-
?
cellohexaose + hydroquinone + O2
oxidized cellobiose + oxidized cellotriose + benzoquinone + H2O
-
cellohexaose yields both DP2 and DP3 oxidized species
-
?
cellopentaose + hydroquinone + O2
oxidized cellobiose + oxidized cellotriose + benzoquinone + H2O
-
-
-
?
cellopentaose + hydroquinone + O2
oxidized cellobiose + oxidized cellotriose + benzoquinone + H2O
-
-
-
?
cellulose + ascorbate + O2
cellooligosaccharides + dehydroascorbate + H2O
-
cleavage generates singly and doubly oxidized products at the C1 and/or C4 positions
-
?
cellulose + ascorbate + O2
cellooligosaccharides + dehydroascorbate + H2O
-
cleavage generates singly and doubly oxidized products at the C1 and/or C4 positions
-
?
cellulose hexasaccharide + acceptor + O2
? + reduced acceptor + H2O
-
-
-
?
cellulose hexasaccharide + acceptor + O2
? + reduced acceptor + H2O
-
-
-
?
glucomannan + ascorbate + O2
? + dehydroascorbate + H2O
-
release of clusters of products up to at least a degree of polymersation DP15, each cluster containing the keto-, gemdiol and native form of hexose oligosaccharides and acetylated species
-
?
glucomannan + ascorbate + O2
cellooligosaccharides + dehydroascorbate + H2O
-
-
-
?
glucomannan + ascorbate + O2
cellooligosaccharides + dehydroascorbate + H2O
-
-
-
?
konjac glucomannan + ascorbate + O2
cellooligosaccharides + dehydroascorbate + H2O
-
products are aldonic acids and gem-diols
-
?
konjac glucomannan + ascorbate + O2
cellooligosaccharides + dehydroascorbate + H2O
-
products are aldonic acids and gem-diols
-
?
lichenan + ascorbate + O2
? + dehydroascorbate + H2O
-
most abundant products show a degree of polymerization of 2-4
-
?
lichenan + ascorbate + O2
? + dehydroascorbate + H2O
-
most abundant products show a degree of polymerization of 2-4
-
?
phosphoric acid swollen cellulose + ascorbate + O2
cellooligosaccharides + dehydroascorbate + H2O
-
-
-
?
phosphoric acid swollen cellulose + ascorbate + O2
cellooligosaccharides + dehydroascorbate + H2O
-
-
-
?
phosphoric acid swollen cellulose + catechin + O2
cello-oligosaccharides + ? + H2O
-
products display a degree of polymerization of DP2 and DP3
-
?
phosphoric acid swollen cellulose + catechin + O2
cello-oligosaccharides + ? + H2O
-
products display a degree of polymerization of DP2 and DP3
-
?
polymeric xyloglucan + acceptor + O2
? + reduced acceptor + H2O
-
-
-
?
polymeric xyloglucan + acceptor + O2
? + reduced acceptor + H2O
-
-
-
?
xyloglucan + ascorbate + O2
? + dehydroascorbate + H2O
-
releases a broad range of xyloglucan oligosaccharides, cleaving occurs at any position along the beta-glucan backbone of xyloglucan, regardless of substitutions. Dominating products contain a four-glucan backbone (XXXG fragments with various degrees of galactosylation), plus C-1-oxidized and C-4-oxidized cellooligosaccharides
-
?
xyloglucan + ascorbate + O2
? + dehydroascorbate + H2O
-
releases a broad range of xyloglucan oligosaccharides, cleaving occurs at any position along the beta-glucan backbone of xyloglucan, regardless of substitutions. Dominating products contain a four-glucan backbone (XXXG fragments with various degrees of galactosylation), plus C-1-oxidized and C-4-oxidized cellooligosaccharides
-
?
xyloglucan + ascorbate + O2
? + dehydroascorbate + H2O
-
two major oxidized products corresponding to the keto-form of single oxidized species, the most probable product configurations being GoxXXL and GoxXLL
-
?
xyloglucan 14-mer + acceptor + O2
? + reduced acceptor + H2O
-
-
-
?
xyloglucan 14-mer + acceptor + O2
? + reduced acceptor + H2O
-
-
-
?
additional information
?
-
-
no substrate: xylan, starch, laminarin, chitin. cleavage of cleavage of hemicelluloses and phosphoric acid swollen cellulose C uses both C1- and C4-oxidizing mechanisms
-
-
?
additional information
?
-
enzyme catalyzes mixed C1/C4 oxidative cleavage of cellulose, reactions of EC 1.14.99.54 and EC1.14.99.56, and xyloglucan, but is inactive toward other (1,4)-linked beta-glucans or chitin and cellooligosaccharides with a degree of polymerization DP 3-6. It shows broad specificity on xyloglucan, cleaving any glycosidic bond in the beta-glucan main chain, regardless of xylosyl substitutions. When incubated with a mixture of xyloglucan and cellulose, LPMO9A efficiently attacks the xyloglucan, whereas cellulose conversion is inhibited. no substrates: xyloglucan-heptamer, birchwood xylan, wheat arabinoxylan, konjac glucomannan, ivory nut mannan, beta-glucan from barley, lichenan from Icelandic moss, starch, and spruce galactoglucomannan
-
-
?
additional information
?
-
-
inactive on shorter cellooligosaccharides, such as cellopentaose and cellohexaose, and on arabinoxylan, ivory nut mannan, wheat arabinoxylan, oat spelt xylan, beech wood xylan, and birchwood xylan or mixed linked beta-glucan. Presence of an electron donor is required
-
-
?
additional information
?
-
inactive on shorter cellooligosaccharides, such as cellopentaose and cellohexaose, and on arabinoxylan, ivory nut mannan, wheat arabinoxylan, oat spelt xylan, beech wood xylan, and birchwood xylan or mixed linked beta-glucan. Presence of an electron donor is required
-
-
?
additional information
?
-
inactive on shorter cellooligosaccharides, such as cellopentaose and cellohexaose, and on arabinoxylan, ivory nut mannan, wheat arabinoxylan, oat spelt xylan, beech wood xylan, and birchwood xylan or mixed linked beta-glucan. Presence of an electron donor is required
-
-
?
additional information
?
-
inactive on shorter cellooligosaccharides, such as cellopentaose and cellohexaose, and on arabinoxylan, ivory nut mannan, wheat arabinoxylan, oat spelt xylan, beech wood xylan, and birchwood xylan or mixed linked beta-glucan. Presence of an electron donor is required
-
-
?
additional information
?
-
inactive on shorter cellooligosaccharides, such as cellopentaose and cellohexaose, and on arabinoxylan, ivory nut mannan, wheat arabinoxylan, oat spelt xylan, beech wood xylan, and birchwood xylan or mixed linked beta-glucan. Presence of an electron donor is required
-
-
?
additional information
?
-
-
isoform LpmoA-2 has broad specificity, cleaving at any position along the beta-glucan backbone of xyloglucan, regardless of substitutions. Inactive on shorter cello-oligosaccharides, such as cellopentaose and cellohexaose, and on arabinoxylan
-
-
?
additional information
?
-
isoform LpmoA-2 has broad specificity, cleaving at any position along the beta-glucan backbone of xyloglucan, regardless of substitutions. Inactive on shorter cello-oligosaccharides, such as cellopentaose and cellohexaose, and on arabinoxylan
-
-
?
additional information
?
-
isoform LpmoA-2 has broad specificity, cleaving at any position along the beta-glucan backbone of xyloglucan, regardless of substitutions. Inactive on shorter cello-oligosaccharides, such as cellopentaose and cellohexaose, and on arabinoxylan
-
-
?
additional information
?
-
isoform LpmoA-2 has broad specificity, cleaving at any position along the beta-glucan backbone of xyloglucan, regardless of substitutions. Inactive on shorter cello-oligosaccharides, such as cellopentaose and cellohexaose, and on arabinoxylan
-
-
?
additional information
?
-
isoform LpmoA-2 has broad specificity, cleaving at any position along the beta-glucan backbone of xyloglucan, regardless of substitutions. Inactive on shorter cello-oligosaccharides, such as cellopentaose and cellohexaose, and on arabinoxylan
-
-
?
additional information
?
-
inactive on shorter cellooligosaccharides, such as cellopentaose and cellohexaose, and on arabinoxylan, ivory nut mannan, wheat arabinoxylan, oat spelt xylan, beech wood xylan, and birchwood xylan or mixed linked beta-glucan. Presence of an electron donor is required
-
-
?
additional information
?
-
inactive on shorter cellooligosaccharides, such as cellopentaose and cellohexaose, and on arabinoxylan, ivory nut mannan, wheat arabinoxylan, oat spelt xylan, beech wood xylan, and birchwood xylan or mixed linked beta-glucan. Presence of an electron donor is required
-
-
?
additional information
?
-
inactive on shorter cellooligosaccharides, such as cellopentaose and cellohexaose, and on arabinoxylan, ivory nut mannan, wheat arabinoxylan, oat spelt xylan, beech wood xylan, and birchwood xylan or mixed linked beta-glucan. Presence of an electron donor is required
-
-
?
additional information
?
-
inactive on shorter cellooligosaccharides, such as cellopentaose and cellohexaose, and on arabinoxylan, ivory nut mannan, wheat arabinoxylan, oat spelt xylan, beech wood xylan, and birchwood xylan or mixed linked beta-glucan. Presence of an electron donor is required
-
-
?
additional information
?
-
enzyme acts both on cellulose and on noncellulose beta-glucans, including cellodextrins and xyloglucan
-
-
?
additional information
?
-
enzyme particularly acts on the glucose backbone of xyloglucan, accepting various substitutions (xylose, galactose) in almost all positions. It requires short stretches of contiguous (1->4)-beta-linked glucose units for activity. No substrates: (1->4)-beta-D-xylan, (1->4)-alpha-D-polygalacturonan, (1->4)-beta-D-mannan, (1->4)-beta-D-galactan, yeast beta-D-glucan, callose, and arabinoxylan
-
-
?
additional information
?
-
products released contain a C4 gemdiol/keto group at the nonreducing end. Hydroquinone, ascorbic acid, and catechin serve equally well as reductant. No substrates: mannohexaose, xylopentaose, xylohexaose, chitopentaose, and maltodextrin
-
-
?
additional information
?
-
-
products released contain a C4 gemdiol/keto group at the nonreducing end. Hydroquinone, ascorbic acid, and catechin serve equally well as reductant. No substrates: mannohexaose, xylopentaose, xylohexaose, chitopentaose, and maltodextrin
-
-
?
additional information
?
-
substrate binding has a substantial effect on the chemical shifts of residues His1, Ala80, His83 and His155
-
-
?
additional information
?
-
-
enzyme acts both on cellulose and on noncellulose beta-glucans, including cellodextrins and xyloglucan
-
-
?
additional information
?
-
products released contain a C4 gemdiol/keto group at the nonreducing end. Hydroquinone, ascorbic acid, and catechin serve equally well as reductant. No substrates: mannohexaose, xylopentaose, xylohexaose, chitopentaose, and maltodextrin
-
-
?
additional information
?
-
substrate binding has a substantial effect on the chemical shifts of residues His1, Ala80, His83 and His155
-
-
?
additional information
?
-
enzyme cleaves cellulose, xyloglucan, mixed-linkage glucan and glucomannan. Oligosaccharides are cleaved using a C4-oxidizing mechanism, reaction of EC 1.14.99.56, whereas polysaccharides are cleaved with both C1- and C4-oxidizing mechanisms in varying proportions, reactions of EC 1.14.99.54 and EC 1.14.99.56
-
-
?
additional information
?
-
LPMO9H is able to target polysaccharides differing from cellulose by their linkage types, glycosidic composition or the presence of sidechains. Isoform LPMO9H catalyzes C4 oxidative cleavage of mixed-linkage glucans, and mixed C1/C4 oxidative cleavage of glucomannan and xyloglucan. Gem-diols and ketones are produced at the non-reducing end, while aldonic acids are produced at the reducing extremity of the products
-
-
?
additional information
?
-
LPMO9H is able to target polysaccharides differing from cellulose by their linkage types, glycosidic composition or the presence of sidechains. Isoform LPMO9H catalyzes C4 oxidative cleavage of mixed-linkage glucans, and mixed C1/C4 oxidative cleavage of glucomannan and xyloglucan. Gem-diols and ketones are produced at the non-reducing end, while aldonic acids are produced at the reducing extremity of the products
-
-
?
