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Literature summary for 2.4.1.207 extracted from

  • Fry, S.C.; Smith, R.C.; Renwick, K.F.; Martin, D.J.; Hodge, S.K.; Matthews, K.J.
    Xyloglucan endotransglycosylase, a new wall-loosening enzyme activity from plants (1992), Biochem. J., 282, 821-828.
No PubMed abstract available

Activating Compound

Activating Compound Comment Organism Structure
2-mercaptoethanol slightly activates Pisum sativum
ascorbate 10 mM, slightly activates Pisum sativum
spermidine 1 mM, slighly activates Pisum sativum

Inhibitors

Inhibitors Comment Organism Structure
Ag+ 1 mM; partial inhibition Pisum sativum
Hg2+ 1 mM, partial inhibition Pisum sativum
La3+ 10 mM, partial inhibition Pisum sativum
additional information not inhibited by 10 mM D-gluconolactone, chelating agents, cello-oligosaccharides, cellopentaose Pisum sativum
Zn2+ 10 mM, partial inhibition Pisum sativum

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
0.05
-
Xyl(1-6)Glc(1-4)(Xyl(1-6))Glc(1-4)(Fuc-Gal-Xyl(1-6))Glc(1-4)Glc xyloglucan-derived nonasaccharide Pisum sativum

Localization

Localization Comment Organism GeneOntology No. Textmining
additional information not ionically bound to the cell wall, little XET activity is covalently bound in the cell wall Pisum sativum
-
-

Metals/Ions

Metals/Ions Comment Organism Structure
Ca2+ 10 mM, slightly activates Pisum sativum
Mg2+ 10 mM, slightly activates Pisum sativum
Mn2+ 10 mM, slightly activates Pisum sativum

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
donor xyloglucan + xyloglucan acceptor Zea mays
-
?
-
?
donor xyloglucan + xyloglucan acceptor Solanum lycopersicum
-
?
-
?
donor xyloglucan + xyloglucan acceptor Pisum sativum enzyme is responsible for cutting and rejoining intermicrofibrillar xyloglucan chains and thus causes the wall-loosening required for plant cell expansion and plant growth, in vivo the usual acceptor is polymeric wall-bound xyloglucan ?
-
?

Organism

Organism UniProt Comment Textmining
Acer pseudoplatanus
-
-
-
Allium schoenoprasum
-
-
-
Anthriscus sylvestris
-
-
-
Bromus erectus
-
-
-
Holcus lanatus
-
-
-
Lupinus polyphyllus
-
-
-
Marchantia polymorpha
-
-
-
Mnium hornum
-
-
-
Pisum sativum
-
-
-
Solanum lycopersicum
-
cv. Ailsa Craig
-
Taraxacum officinale
-
-
-
Zea mays
-
-
-

Source Tissue

Source Tissue Comment Organism Textmining
epicotyl
-
Pisum sativum
-
gametophyte
-
Mnium hornum
-
leaf
-
Zea mays
-
leaf
-
Solanum lycopersicum
-
leaf
-
Lupinus polyphyllus
-
leaf
-
Holcus lanatus
-
leaf
-
Bromus erectus
-
leaf
-
Anthriscus sylvestris
-
seedling
-
Solanum lycopersicum
-
seedling 7-8-day etiolated seedlings Pisum sativum
-
stem
-
Zea mays
-
stem
-
Solanum lycopersicum
-
stem
-
Holcus lanatus
-
stem
-
Bromus erectus
-
stem etiolated stem, activity is positively correlated with growth rate in different zones of pea stem Pisum sativum
-
stem first year stem Acer pseudoplatanus
-
stem peduncle Taraxacum officinale
-
stem peduncle Allium schoenoprasum
-
thallus
-
Marchantia polymorpha
-

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
donor xyloglucan + acceptor xyloglucan
-
Zea mays ?
-
?
donor xyloglucan + acceptor xyloglucan
-
Solanum lycopersicum ?
-
?
donor xyloglucan + acceptor xyloglucan
-
Acer pseudoplatanus ?
-
?
donor xyloglucan + acceptor xyloglucan
-
Taraxacum officinale ?
-
?
donor xyloglucan + acceptor xyloglucan
-
Lupinus polyphyllus ?
-
?
donor xyloglucan + acceptor xyloglucan
-
Marchantia polymorpha ?
-
?
donor xyloglucan + acceptor xyloglucan
-
Mnium hornum ?
-
?
donor xyloglucan + acceptor xyloglucan
-
Allium schoenoprasum ?
-
?
donor xyloglucan + acceptor xyloglucan
-
Holcus lanatus ?
-
?
donor xyloglucan + acceptor xyloglucan
-
Bromus erectus ?
-
?
donor xyloglucan + acceptor xyloglucan
-
Anthriscus sylvestris ?
-
?
donor xyloglucan + acceptor xyloglucan acceptor specificity Pisum sativum ?
-
?
donor xyloglucan + acceptor xyloglucan highly specific for xyloglucan as the glycosyl donor Pisum sativum ?
-
?
donor xyloglucan + acceptor xyloglucan minimum acceptor structure is Xyl2Glc3 Pisum sativum ?
-
?
donor xyloglucan + acceptor xyloglucan xyloglucan from Rosa cultures Pisum sativum ?
-
?
donor xyloglucan + acceptor xyloglucan xyloglucan from Tropaeolum majus seed Pisum sativum ?
-
?
donor xyloglucan + acceptor xyloglucan donor specificity Pisum sativum ?
-
?
donor xyloglucan + acceptor xyloglucan enzyme transfers a large segment of a xyloglucan molecule to another one generating chimeric polymers Pisum sativum ?
-
?
donor xyloglucan + acceptor xyloglucan acceptors: xyloglucan-derived nonasaccharide Glc4Xyl3GalFuc and certain other xyloglucan oligosaccharides, non-reducing terminal Xyl-Glc group is essential Pisum sativum ?
-
?
donor xyloglucan + Xyl(1-6)Glc(1-4)(Xyl(1-6))Glc(1-4)(Fuc-Gal-Xyl(1-6))Glc(1-4)Glc acceptor: xyloglucan-derived nonasaccharide XG9, Glc4Xyl3GalFuc, highly specific for xyloglucan as the glycosyl donor, xyloglucan from Tropaeolum seed is somewhat better than from Rosa cultures, enzyme transfers part of a large xyloglucan molecule to the nonasaccharide forming a polymer with a beta-1,4-linkage to the product and the acceptor group of the nonasaccharide is O-4 of the Glc residue furthest from the reducing terminus Pisum sativum ?
-
?
donor xyloglucan + Xylalpha(1-6)Glcbeta(1-4)(Galbeta(1-2)Xylalpha(1-6))Glcbeta(1-4)(Galbeta(1-2)Xylalpha(1-6))Glcbeta(1-4)Glc XG9n, better substrate than Glc4Xyl3GalFuc Pisum sativum ?
-
?
donor xyloglucan + Xylalpha(1-6)Glcbeta(1-4)(Xylalpha(1-6))Glcbeta(1-4)(Xylalpha(1-6))Glcbeta(1-4)Glc XG7, better substrate than Glc4Xyl3GalFuc Pisum sativum ?
-
?
donor xyloglucan + xyloglucan acceptor
-
Zea mays ?
-
?
donor xyloglucan + xyloglucan acceptor
-
Solanum lycopersicum ?
-
?
donor xyloglucan + xyloglucan acceptor enzyme is responsible for cutting and rejoining intermicrofibrillar xyloglucan chains and thus causes the wall-loosening required for plant cell expansion and plant growth, in vivo the usual acceptor is polymeric wall-bound xyloglucan Pisum sativum ?
-
?
additional information
-
Zea mays ?
-
?
additional information
-
Solanum lycopersicum ?
-
?
additional information no acceptors: alpha-D-Xylp(1-6)D-Glc and isoprimeverose Pisum sativum ?
-
?

Temperature Optimum [°C]

Temperature Optimum [°C] Temperature Optimum Maximum [°C] Comment Organism
25
-
assay at Pisum sativum
25
-
assay at Zea mays
25
-
assay at Solanum lycopersicum
25
-
assay at Acer pseudoplatanus
25
-
assay at Taraxacum officinale
25
-
assay at Lupinus polyphyllus
25
-
assay at Marchantia polymorpha
25
-
assay at Mnium hornum
25
-
assay at Allium schoenoprasum
25
-
assay at Holcus lanatus
25
-
assay at Bromus erectus
25
-
assay at Anthriscus sylvestris

Temperature Stability [°C]

Temperature Stability Minimum [°C] Temperature Stability Maximum [°C] Comment Organism
additional information
-
boiling inactivates Pisum sativum

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
5.5
-
-
Pisum sativum

pH Range

pH Minimum pH Maximum Comment Organism
4 7 pH 4: 25-35% of maximal activity, pH 7: 30-40% of maximal activity Pisum sativum