ID   2.4.1.135
DE   galactosylgalactosylxylosylprotein 3-beta-glucuronosyltransferase.
AN   glucuronosyltransferase I.
AN   uridine diphosphate glucuronic acid:acceptor glucuronosyltransferase.
CA   3-O-(beta-D-galactosyl-(1->3)-beta-D-galactosyl-(1->4)-beta-D-xylosyl)-L-
CA   seryl-[protein] + UDP-alpha-D-glucuronate = 3-O-(beta-D-GlcA-(1->3)-beta-
CA   D-Gal-(1->3)-beta-D-Gal-(1->4)-beta-D-Xyl)-L-seryl-[protein] + H(+) +
CA   UDP.
CC   -!- Involved in the biosynthesis of the linkage region of
CC       glycosaminoglycan chains as part of proteoglycan biosynthesis
CC       (chondroitin, dermatan and heparan sulfates).
DR   Q9VTG7, B3G2P_DROME;  Q9VLA1, B3G2S_DROME;  Q5CB03, B3GA1_CANLF;
DR   Q9P2W7, B3GA1_HUMAN;  Q9CW73, B3GA1_MOUSE;  Q5CB04, B3GA1_PANTR;
DR   O35789, B3GA1_RAT  ;  Q5CAZ6, B3GA2_CANLF;  Q9NPZ5, B3GA2_HUMAN;
DR   P59270, B3GA2_MOUSE;  Q9Z137, B3GA2_RAT  ;  Q9WU47, B3GA3_CRIGR;
DR   O94766, B3GA3_HUMAN;  P58158, B3GA3_MOUSE;  O97422, B3GI_DROME ;
DR   Q09363, SQV8_CAEEL ;
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