Molecular Cloning and Expression of anN-Acetylgalactosamine-4-O-sulfotransferase That Transfers Sulfate to Terminal and Non-terminal β1,4-LinkedN-Acetylgalactosamine*

Molecular Cloning and Expression of anN-Acetylgalactosamine-4-O-sulfotransferase That Transfers Sulfate to Terminal and Non-terminal β1,4-LinkedN-Acetylgalactosamine*
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将硫酸盐转移至末端和非末端 β1,4-连接的 N-乙酰半乳糖胺的 N-乙酰半乳糖胺-4-O-磺基转移酶的分子克隆和表达*

DOI:
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发表时间:
2001
影响因子:
4.8
通讯作者:
M. Schachner
M. Schachner
中科院分区:
生物学2区
文献类型:
--
作者:
Hyung;Matthias R. Evers;Guoqing Xia;J. Baenziger;M. Schachner

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我们根据其与 HNK-1 磺基转移酶 (HNK-1 ST) 的同源性,鉴定并表征了一种 N-乙酰半乳糖胺-4-O-磺基转移酶,命名为 GalNAc-4-ST2(GenBankTM 登录号 AF332472)。该cDNA预测一个开放阅读框,编码443个氨基酸的II型膜蛋白,具有12个氨基酸的胞质结构域、23个氨基酸的跨膜结构域和包含四个潜在的N-连接糖基化位点的408个氨基酸的管腔结构域。 GalNAc-4-ST2 与 GalNAc-4-ST1 (46%)、HNK-1 ST (23%)、软骨素 4-O-磺基转移酶-1 (C4ST-1) (27%) 和软骨素 4-O-磺基转移酶-2 (C4ST-2) (24%) 显示出高度的氨基酸序列同一性。 GalNAc-4-ST2 将硫酸盐转移至软骨素和皮肤素中 N-连接寡糖和非末端 β1,4-连接 GalNAc 上发现的 GalNAc-β1,4GlcNAcβ-R 序列中末端 β1,4-连接 GalNAc 的 C-4 羟基。 GalNAc-4-ST2 的翻译区域由位于人类染色体 18q11.2 上的五个外显子编码。 Northern 印迹分析揭示了 2.1 kb 的转录本。 GalNAc-4-ST2 信息在气管中表达最高,在心脏、肝脏、胰腺、唾液腺和睾丸中表达程度较低。 I.M.A.G.E. cDNA 克隆 ​​49547 包含假定的 GalNAc-4-ST2 剪接形式,其开放阅读框编码 358 个氨基酸的蛋白质,缺乏跨膜结构域和茎区。这种形式的 GalNAc-4-ST2 不会被转染细胞保留,并且对软骨素有活性,但对末端 β1,4 连接的 GalNAc 没有活性。因此,与 GalNAc-4-ST1 一样,催化结构域 N 端的序列有助于 GalNAc-4-ST2 对末端 β1,4-连接的 GalNAc 的特异性。
We have identified and characterized anN-acetylgalactosamine-4-O-sulfotransferase designated GalNAc-4-ST2 (GenBankTM accession numberAF332472) based on its homology to HNK-1 sulfotransferase (HNK-1 ST). The cDNA predicts an open reading frame encoding a type II membrane protein of 443 amino acids with a 12-amino acid cytoplasmic domain, a 23-amino acid transmembrane domain, and a 408-amino acid luminal domain containing four potential N-linked glycosylation sites. GalNAc-4-ST2 displays a high degree of amino acid sequence identity with GalNAc-4-ST1 (46%), HNK-1 ST (23%), chondroitin 4-O-sulfotransferase-1 (C4ST-1) (27%), and chondroitin 4-O-sulfotransferase-2 (C4ST-2) (24%). GalNAc-4-ST2 transfers sulfate to the C-4 hydroxyl of terminal β1,4-linked GalNAc in the sequence GalNAc-β1,4GlcNAcβ-R found on N-linked oligosaccharides and nonterminal β1,4-linked GalNAc in chondroitin and dermatan. The translated region of GalNAc-4-ST2 is encoded by five exons located on human chromosome 18q11.2. Northern blot analysis reveals a 2.1-kilobase transcript. GalNAc-4-ST2 message is most highly expressed in trachea and to a lesser extent in heart, liver, pancreas, salivary gland, and testis. The I.M.A.G.E. cDNA clone 49547 contains a putative GalNAc-4-ST2 splice form with an open reading frame encoding a protein of 358 amino acids that lacks the transmembrane domain and the stem region. This form of GalNAc-4-ST2 is not retained by transfected cells and is active against chondroitin but not terminal β1,4-linked GalNAc. Thus, as with GalNAc-4-ST1, sequences N-terminal to the catalytic domain contribute to the specificity of GalNAc-4-ST2 toward terminal β1,4-linked GalNAc.
DOI: 10.1073/pnas.89.1.334
发表时间: 1992-01-01
影响因子: 11.1
作者:
BAENZIGER, JU;KUMAR, S;BERANEK, MC
通讯作者: BERANEK, MC
DOI: 10.1016/0968-0004(91)90102-2
发表时间: 1991-07-01
影响因子: 13.8
作者:
VLODAVSKY, I;BARSHAVIT, R;FUKS, Z
通讯作者: FUKS, Z
负责糖蛋白激素天冬酰胺连接寡糖上末端 β-N-乙酰基-D-半乳糖胺 4-O-硫酸化的磺基转移酶的表征。
DOI: --
发表时间: 1991
期刊: The Journal of biological chemistry
影响因子: --
作者:
Skelton,TP;Hooper,LV;Srivastava,V;Hindsgaul,O;Baenziger,JU
通讯作者: Baenziger,JU