在受体氨酸激酶AXL中识别C-mannosylation
Kento Mori1, Takehiro Suzuki2, Urara Waki1
1Department of Applied Chemistry, Faculty of Science and Technology, Keio University, Yokohama, Kanagawa 223-8522, Japan.
Glycobiology
|December 11, 2024
概括
独特的蛋白质修饰C-mannosylation在AXL受体氨酸激酶上得到证实. 此修改影响了AXL.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 癌症研究 癌症研究
背景情况:
- C-曼诺基化是一种罕见的翻译后修饰,在这种修饰中,曼诺基与蛋白质中的托残留物结合在一起.
- 生物中的C-曼诺基化作用在很大程度上仍未被阐明.
- AXL受体氨酸激酶在各种癌症中经常过度表达,促进瘤的进展,入侵,耐药性和血管生成模仿性.
研究的目的:
- 为了确认AXL的C-mannosylation在烯320 (Trp320) 中.
- 为了研究AXL C-mannosylation对癌细胞行为,特别是血管生成模拟的功能影响.
- 探索C-mannosylation是否影响AXL的下游信号通路.
主要方法:
- 使用质谱检测检测和确认重组AXL的C-mannosylation.
- 使用CRISPR/Cas9基因编辑来产生缺乏AXL的乳腺癌细胞 (MDA-MB-231).
- 在这些工程细胞中进行了野生类型和C-mannosylation-deficient AXL突变的重新表达.
主要成果:
- 在AXL的Trp320的C-mannosylation被实验证实,使用纯化重组AXL的质谱分析.
- 缺乏C-mannosylation的AXL的重新表达导致MDA-MB-231细胞中血管生成模仿物形成的显著减少.
- 一个关键的下游信号分子AKT的酸化水平在表达野生型AXL和C-mannosylation缺乏AXL的细胞之间是相似的.
结论:
- 这项研究提供了首次证据,表明C-曼诺基化发生在受体氨酸激酶上,特别是AXL.
- AXL C-mannosylation似乎在调节AXL介导的血管仿真形成中发挥作用,独立于正规的AKT信号传输.
- 这些发现表明一种新的机制,通过C-mannosylation影响受体氨酸激酶在癌症进展中的功能.
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