An insertion in the human thyrotropin receptor critical for high affinity hormone binding.

An insertion in the human thyrotropin receptor critical for high affinity hormone binding.
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人促甲状腺素受体中的插入对于高亲和力激素结合至关重要。

DOI:
10.1126/science.2169649
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发表时间:
1990
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Rapoport,B
Rapoport,B
中科院分区:
--
文献类型:
--
作者:
Wadsworth,HL;Chazenbalk,GD;Nagayama,Y;Russo,D;Rapoport,B

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促甲状腺激素(TSH)、促黄体激素(LH)和绒毛膜促性腺激素(CG)是结构上相关的糖蛋白激素,它们与具有高度序列相似性的受体结合。然而,TSH和LH-CG受体的一级氨基酸序列的比较揭示了在TSH受体的细胞外结构域中的8个和50个氨基酸的两个独特插入。通过定点诱变确定这些插入的功能意义。缺失50个氨基酸(残基317至366)对TSH结合或TSH和甲状腺刺激免疫球蛋白(TSI)的生物活性没有影响。相反,缺失或取代的8个氨基酸的区域(残基38至45)取消这些活动。TSH受体氨基末端附近的这8个氨基酸区似乎是TSH和TSI相互作用的重要位点。
Thyrotropin (TSH), luteinizing hormone (LH), and chorionic gonadotropin (CG) are structurally related glycoprotein hormones, which bind to receptors that share a high degree of sequence similarity. However, comparison of the primary amino acid sequences of the TSH and LH-CG receptors reveals two unique insertions of 8 and 50 amino acids in the extracellular domain of the TSH receptor. The functional significance of these insertions were determined by site-directed mutagenesis. Deletion of the 50-amino acid tract (residues 317 to 366) had no effect on TSH binding or on TSH and thyroid-stimulating immunoglobulin (TSI) biological activities. In contrast, either deletion or substitution of the eight-amino acid region (residues 38 to 45) abolished these activities. This eight-amino acid tract near the amino terminus of the TSH receptor appears to be an important site of interaction for both TSH and TSI.
DOI: 10.1126/science.2315699
发表时间: 1990-03-16
期刊: SCIENCE
影响因子: 56.9
作者:
BOWIE, JU;REIDHAAROLSON, JF;SAUER, RT
通讯作者: SAUER, RT
DOI: 10.1210/mend-4-4-525
发表时间: 1990-04-01
影响因子: --
作者:
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通讯作者: SEEBURG, PH
DOI: 10.1126/science.2502842
发表时间: 1989-08-04
期刊: SCIENCE
影响因子: 56.9
作者:
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通讯作者: SEEBURG, PH
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发表时间: 1989-12-22
期刊: SCIENCE
影响因子: 56.9
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