Any feedback?
Please rate this page
(all_enzymes.php)
(0/150)

BRENDA support

2.4.1.212: hyaluronan synthase

This is an abbreviated version!
For detailed information about hyaluronan synthase, go to the full flat file.

Word Map on EC 2.4.1.212

Reaction

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]

Synonyms

CHAS2, CHAS3, class I hyaluronan synthase, CPS1, DG42 protein, HA synthase, HA synthase 3, HA1, HA2, HA3, HAS, HAS-1, HAS-2, HAS-3, HAS1, Has2, Has3, hasA, HASs, HsHAS1, HuHAS1, HyaD, hyaluronan synthase, hyaluronan synthase 1, hyaluronan synthase 2, hyaluronan synthase 3, hyaluronan synthase-1, hyaluronan synthase-2, hyaluronan synthases 2, hyaluronan synthethase, hyaluronate synthase, hyaluronate synthetase, hyaluronic acid synthase, hyaluronic acid synthetase, More, PmHAS, seHAS, XHAS1, XHAS2, XHAS3

ECTree

     2 Transferases
         2.4 Glycosyltransferases
             2.4.1 Hexosyltransferases
                2.4.1.212 hyaluronan synthase

Systematic Name

Systematic Name on EC 2.4.1.212 - hyaluronan synthase

Please wait a moment until all data is loaded. This message will disappear when all data is loaded.
SYSTEMATIC NAME
IUBMB Comments
Alternating UDP-alpha-N-acetyl-D-glucosamine:beta-D-glucuronosyl-(1->3)-[nascent hyaluronan] 4-N-acetyl-beta-D-glucosaminyltransferase and UDP-alpha-D-glucuronate:N-acetyl-beta-D-glucosaminyl-(1->4)-[nascent hyaluronan] 3-beta-D-glucuronosyltransferase
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 [3]. 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.