介绍:在分子和细胞层面上识别甘氨酸-乳氨酸是必不可少的:与瘤相关的O-甘氨酸与巨细胞糖类乳氨酸的相互作用
Ana Sofia Grosso1,2, Ana Diniz1,2, Cátia O Soares1,2
1UCIBIO - Applied Molecular Biosciences Unit, Department of Chemistry, NOVA School of Science and Technology, NOVA University Lisbon, 2829-516 Caparica, Portugal.
JACS Au
|January 30, 2026
概括
人类巨细胞的银糖类型的莱克 (MGL) 与瘤相关的森新 (Tn) O-甘氨酸比化变体 (STn) 或森-弗里登里希 (TF) O-甘氨酸更强烈地结合. MGL作为截断癌症相关的O-甘氨酸的通用受体.
科学领域:
- 生物化学和分子生物学
- 葡萄糖生物学 葡萄糖生物学
- 癌症研究 癌症研究
背景情况:
- 人类巨细胞的银糖类型莱克 (MGL) 对于识别瘤相关的碳水化合物结构至关重要.
- MGL与在特定瘤O-甘氨酸中发现的N-乙糖胺 (GalNAc) 残留物结合,包括Thomsen-nouveau (Tn),化Tn (STn) 和Thomsen-Friedenreich (TF).
研究的目的:
- 阐明分子特异性和决定MGL对Tn,STn和TF O-糖的认可的决定因素.
- 为了研究MGL结合在分子和细胞层面,考虑到糖甘和乳清呈现.
主要方法:
- 综合化学,结构和功能分析.
- 核磁共振 (NMR) 光谱,同热度定位热量计和分子动力学模拟.
- 基于细胞的粘蛋白阵列和表达MGL的糖基工程细胞系.
主要成果:
- MGL碳水化合物识别域 (MGL-CRD) 显示有约束性的偏好:Tn > STn ≫ TF O-glycans.
- 结构研究表明,依据O-糖结构和密度,结合的定量差异存在.
- 细胞测定证实了MGL-CRD对Tn/STn在癌细胞上的特异性,并证明了MGL在原生寡合体状态下与简单的O-甘氨酸结合.
结论:
- MGL 的结合亲和性和特异性受O-甘氨酸结构,密度和呈现的影响.
- 在其天然的寡合体形式MGL的呈现导致更广泛的结合截断,瘤相关的O-甘氨酸.
- MGL作为各种截断癌症相关的O-甘氨酸的潜在通用受体.
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