N-linked glycosylation is not required for Na+/glucose symport activity in LLC-PK1 cells.

N-linked glycosylation is not required for Na+/glucose symport activity in LLC-PK1 cells.
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LLC-PK1 细胞中的 Na /葡萄糖同向转运活性不需要 N 连接糖基化。

DOI:
10.1016/0005-2736(94)90131-7
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发表时间:
1994
期刊:
Biochimica et biophysica acta
影响因子:
--
通讯作者:
Lever,JE
Lever,JE
中科院分区:
--
文献类型:
--
作者:
Wu,JS;Lever,JE

文献摘要

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使用 LLC-PK1 细胞培养物研究了 N 连接糖基化在 Na+/葡萄糖同向转运蛋白功能中的作用。在完整的 LLC-PK1 细胞中,衣霉素处理不会抑制 Na+ 依赖性葡萄糖转运或根皮苷结合活性。然而,来自衣霉素处理细胞的顶膜囊泡没有可检测到的Na + 依赖性葡萄糖转运活性,但保留了与同向转运蛋白结合的根皮苷不变。这些观察结果表明,N-连接糖基化对于完整细胞中的转运功能或插入膜中不是必需的,但可能在维持分离膜中的同向转运蛋白转运活性中发挥作用
The role of N-linked glycosylation in Na+/glucose symporter function was investigated using LLC-PK1cell cultures. Tunicamycin treatment did not inhibit Na+-dependent glucose transport or phlorizin binding activity assayed in intact LLC-PK1cells. However apical membrane vesicles derived from tunicamycin-treated cells had no detectable Na+-dependent glucose transport activity but retained unchanged phlorizin binding to the symporter. These observations suggest that N-linked glycosylation is not required for transport function or insertion in the membrane in intact cells but may play a role in maintaining symporter transport activity in isolated membranes