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Information on EC 2.4.1.212 - hyaluronan synthase

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EC Tree
     2 Transferases
         2.4 Glycosyltransferases
             2.4.1 Hexosyltransferases
                2.4.1.212 hyaluronan synthase
IUBMB Comments
The enzyme from Streptococcus Group A and Group C requires Mg2+. The enzyme adds GlcNAc to nascent hyaluronan when the non-reducing end is GlcA, but it adds GlcA when the non-reducing end is GlcNAc . The enzyme is highly specific for UDP-GlcNAc and UDP-GlcA; no copolymerization is observed if either is replaced by UDP-Glc, UDP-Gal, UDP-GalNAc or UDP-GalA. Similar enzymes have been found in a variety of organisms.
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Word Map
The enzyme appears in viruses and cellular organisms
Synonyms
hyaluronan synthase, ha synthase, hyaluronan synthase 2, has-2, hyaluronic acid synthase, sehas, has-1, pmhas, hyaluronan synthase-2, hyaluronate synthase, more
REACTION
REACTION DIAGRAM
COMMENTARY hide
ORGANISM
UNIPROT
LITERATURE
UDP-alpha-D-glucuronate + N-acetyl-beta-D-glucosaminyl-(1->4)-beta-D-glucuronosyl-(1->3)-[nascent hyaluronan] = UDP + beta-D-glucuronosyl-(1->3)-N-acetyl-beta-D-glucosaminyl-(1->4)-beta-D-glucuronosyl-(1->3)-[nascent hyaluronan]
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UDP-N-acetyl-alpha-D-glucosamine + beta-D-glucuronosyl-(1->3)-N-acetyl-beta-D-glucosaminyl-(1->4)-[nascent hyaluronan] = UDP + N-acetyl-beta-D-glucosaminyl-(1->4)-beta-D-glucuronosyl-(1->3)-N-acetyl-beta-D-glucosaminyl-(1->4)-[nascent hyaluronan]
show the reaction diagram
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