产品内容
本酶催化的反应为UDP-N-Acetyl-alpha-D-Galactosamine + 3-O-[N-Acetyl-beta-D-Glucosaminyl-(1->4)-alpha-D-Mannosyl]-L-Threonyl-[Protein] = UDP + 3-O-[N-Acetyl-beta-D-Galactosaminyl-(1->3)-N-Acetyl-beta-D-Glucosaminyl-(1->4)-alpha-D-Mannosyl]-L-Threonyl-[Protein]，系统名称为UDP-N-Acetyl-alpha-D-Galactosamine:N-Acetyl-beta-D-Glucosaminyl-(1->4)-alpha-D-Mannosyl-Threonyl-[Protein] 3-beta-N-Acetyl-D-Galactosaminyltransferase，该人源蛋白对UDP-N-乙酰-α-D-半乳糖胺作为供体具有专一性 [1]。该酶参与在α-肌萎缩蛋白聚糖（一种细胞外周糖蛋白，作为含层粘连蛋白G结构域的细胞外基质蛋白的受体）的苏氨酸残基上形成磷酸化三糖。
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