Glycan Modulation of Insulin-like Growth Factor-1 Receptor.

Glycan Modulation of Insulin-like Growth Factor-1 Receptor.
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胰岛素样生长因子-1 受体的聚糖调节。

DOI:
10.1002/anie.202211320
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发表时间:
2022-12-05
期刊:
Angewandte Chemie (International ed. in English)
影响因子:
--
通讯作者:
Desai UR
Desai UR
中科院分区:
其他
文献类型:
--
作者:
Boothello RS;Sankaranarayanan NV;Sistla JC;Nagarajan B;Sharon C;Chittum JE;Niyaz RY;Roy S;Nandi A;O'Hara CP;Gangji RN;Afosah DK;Ongolu R;Patel BB;Desai UR

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胰岛素样生长因子-1受体(IGF-1 R)是一种在癌症中起关键作用的受体酪氨酸激酶(RTK)。微阵列、计算、热力学和细胞成像研究揭示,IGF-1 R通过其同源配体IGF-1的激活被较短的可溶性硫酸乙酰肝素(HS)序列(例如,HS 06),而较长的聚合物链不抑制RTK,这是一种与已知的GAG-蛋白质系统的传统关系直接相反的现象。这种抑制作用是由IGF-1 R胞外域中独特口袋中结合的较小寡糖引起的,该口袋与天然同源配体IGF 1竞争。这项工作提出了一个非常有趣的观察IGF-1 R的优先和竞争性抑制较小的序列,而多糖是缺乏这种功能。这些见解将对糖生物学家和抗癌药物发现者具有重要价值。这项工作为胰岛素样生长因子-1受体(IGF-1 R)提供了一个新的视角,IGF-1 R优先被较小的硫酸乙酰肝素链抑制,例如,HS 06,与较长的多糖链相反,HS 36,它们缺乏抑制功能。
The insulin-like growth factor-1 receptor (IGF-1R) is a receptor tyrosine kinase (RTK) that plays critical roles in cancer. Microarray, computational, thermodynamic, and cellular imaging studies reveal that activation of IGF-1R by its cognate ligand IGF-1 is inhibited by shorter, soluble heparan sulfate (HS) sequences (e.g., HS06), whereas longer polymeric chains do not inhibit the RTK, a phenomenon directly opposed to the traditional relationship known for GAG–protein systems. The inhibition arises from smaller oligosaccharides binding in a unique pocket in the IGF-1R ectodomain, which competes with the natural cognate ligand IGF1. This work presents a highly interesting observation on preferential and competing inhibition of IGF-1R by smaller sequences, whereas polysaccharides are devoid of this function. These insights will be of major value to glycobiologists and anti-cancer drug discoverers. The work provides a new insight into insulin-like growth factor-1 receptor (IGF-1R), which is preferentially inhibited by smaller heparan sulfate chains, e.g., HS06, in contrast to longer polysaccharidic chains, e.g., HS36, which are devoid of the inhibition function.
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