多肽N-乙酰半乳糖胺转移酶15 (EC 2.4.1.41) (多肽GalNAc转移酶样蛋白2) (GalNAc-T样蛋白2) (pp-GaNTase样蛋白2) (多肽N-乙酰半乳糖胺转移酶样蛋白2) (蛋白质-UDP乙酰半乳糖胺转移酶样蛋白2) (UDP-GalNAc:多肽N-乙酰半乳糖胺转移酶样蛋白2)
多肽N-乙酰半乳糖胺转移酶15 (EC 2.4.1.41) (多肽GalNAc转移酶样蛋白2) (GalNAc-T样蛋白2) (pp-GaNTase样蛋白2) (多肽N-乙酰半乳糖胺转移酶样蛋白2) (蛋白质-UDP乙酰半乳糖胺转移酶样蛋白2) (UDP-GalNAc:多肽N-乙酰半乳糖胺转移酶样蛋白2)
Q8N3T1功能描述
催化O-连接寡糖生物合成中的起始反应,即将N-乙酰-D-半乳糖胺残基转移至蛋白受体上的丝氨酸或苏氨酸残基。尽管与GALNT2相比,它对所有测试底物的活性要弱得多,但它能够将多达七个GalNAc残基转移至Muc5AC肽,表明它可以与其他GALNT蛋白协同填充邻近的Thr/Ser残基。优先以Muc1a作为底物。 {ECO:0000269|PubMed:15147861}。
组织特异性
Widely expressed. Highly expressed in small intestine, placenta, spleen, cerebral cortex and ovary. Expressed at intermediate level in uterus, mammary gland, stomach, cerebellum and whole brain. Weakly expressed in fetal brain, bone marrow, thyroid gland, thymus, heart, skeletal muscle, lung, liver, colon, pancreas, kidney and testis. Not expressed in leukocyte. Expressed in both normal and osteoarthritic cartilage. Expressed at low level in chondrocytes in all zones of both normal and osteoarthritic cartilage.
亚细胞定位
Golgi apparatus membrane
关键词