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In enzymology, a xyloglucan 6-xylosyltransferase () is an
enzyme Enzymes () are proteins that act as biological catalysts by accelerating chemical reactions. The molecules upon which enzymes may act are called substrate (chemistry), substrates, and the enzyme converts the substrates into different molecule ...
that
catalyzes Catalysis () is the process of increasing the rate of a chemical reaction by adding a substance known as a catalyst (). Catalysts are not consumed in the reaction and remain unchanged after it. If the reaction is rapid and the catalyst recyc ...
the
chemical reaction A chemical reaction is a process that leads to the chemical transformation of one set of chemical substances to another. Classically, chemical reactions encompass changes that only involve the positions of electrons in the forming and break ...
in which an alpha-D- xylosyl residue is transferred from UDP-D-xylose to a
glucose Glucose is a simple sugar with the molecular formula . Glucose is overall the most abundant monosaccharide, a subcategory of carbohydrates. Glucose is mainly made by plants and most algae during photosynthesis from water and carbon dioxide, usi ...
residue in xyloglucan, being attached by an alpha-1,6-D-xylosyl-D-glucose bond. This enzyme belongs to the family of
glycosyltransferase Glycosyltransferases (GTFs, Gtfs) are enzymes (EC 2.4) that establish natural glycosidic linkages. They catalyze the transfer of saccharide moieties from an activated nucleotide sugar (also known as the " glycosyl donor") to a nucleophilic gl ...
s, specifically the pentosyltransferases. The
systematic name A systematic name is a name given in a systematic way to one unique group, organism, object or chemical substance, out of a specific population or collection. Systematic names are usually part of a nomenclature. A semisystematic name or semitrivial ...
of this enzyme class is UDP-D-xylose:xyloglucan 1,6-alpha-D-xylosyltransferase. Other names in common use include uridine diphosphoxylose-xyloglucan 6alpha-xylosyltransferase, and xyloglucan 6-alpha-D-xylosyltransferase.


References

* * EC 2.4.2 Enzymes of unknown structure {{2.4-enzyme-stub