点击构建的模块化信号吸收器嵌合体使膜蛋白的受体独立降解成为可能
Wanlin Xie1,2, Weidi Sun2, Qin Li2,3
1School of Materials Science and Engineering, Tianjin University, Tianjin 300350, China.
概括
这项研究引入了一种针对细胞膜蛋白的光体降解的新型信号光体平台 (SApt),克服了潜在的癌症治疗目前光体向仿真体 (LYTAC) 的局限性.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 药物发现 药物发现 药物发现
背景情况:
- 细胞膜蛋白在信号转导和疾病发病过程中至关重要.
- lysosome-targeting chimeras (LYTACs) 通过诱导 lysosomal 降解提供了一个新的治疗策略.
- 目前的LYTACs由于 lysosome-targeting受体 (LTR) 的可变表达而面临限制.
研究的目的:
- 开发一个通用平台,以向膜蛋白进行 lysosomal 降解,独立于特定的 LTR.
- 设计一个新的信号接受器平台 (SApt),利用YXXØ分类信号.
- 证明SAPT在降解与疾病相关的膜蛋白及其治疗潜力的有效性.
主要方法:
- 通过通过点击化学将LAMP-2a的YXXØ分类信号与aptamer结合起来,合成了SAPT.
- 使用SApt平台评估了膜蛋白 (PTK7,Met,NCL) 的降解.
- 在异种移植瘤模型中评估了抗瘤疗效,评估了体内蛋白质降解.
主要成果:
- SApts在准膜蛋白和诱导有效的溶酶体降解方面表现出高特异性.
- 该SApt平台成功降解了与疾病相关的膜蛋白PTK7,Met和NCL,独立于LTRs.
- 在异种移植模型中,体内研究证实了PTK7的强烈抗瘤功效和降解.
结论:
- 开发的SApt平台提供了一种简单且通用的方法,用于膜蛋白的溶酶体降解.
- 这项技术克服了依赖LTR的LYTACs的局限性,显示出显著的翻译潜力.
- 在涉及膜蛋白失调的疾病,特别是癌症中,SAPT是一种有前途的治疗策略.
相关概念视频
Regulated Protein Degradation
7.1K
It is vital to regulate the activity of enzymatic as well as non-enzymatic proteins inside the cell. This can be achieved either through creating a balance between their rate of synthesis and degradation or regulating the intrinsic activity of the protein. Both these regulation mechanisms play an essential role in the normal functioning of cells.
Protein degradation plays two important roles in the cells. It helps to protect cells from misfolded or damaged proteins before they lead to a...
Protein degradation plays two important roles in the cells. It helps to protect cells from misfolded or damaged proteins before they lead to a...
7.1K
Mitochondrial Precursor Proteins
2.5K
Mitochondrial precursors are partially unfolded or loosely folded polypeptide chains. Newly synthesized precursors are inhibited from spontaneously folding into their native conformation by the cytosolic chaperones, heat shock proteins 70 (Hsp70), and mitochondrial import stimulation factors (MSFs). Precursors bound to MSFs are guided to the TOM70-TOM37 receptors, while precursors bound to Hsp70 chaperones are targetted to TOM20-TOM22 receptor complexes.
Most of the mitochondrial...
Most of the mitochondrial...
2.5K
Assembly of Signaling Complexes
5.7K
Multiprotein signaling complexes are formed in a dynamic process involving protein-protein interactions at the cytoplasmic domain of transmembrane receptors or enzymatic and non-enzymatic proteins associated with the receptor. These complexes ensure the activation and propagation of intracellular signals that regulate cell functions.
Interaction domains in cell signaling
Interaction domains recognize exposed features of their binding partners containing post-translationally modified sequences,...
Interaction domains in cell signaling
Interaction domains recognize exposed features of their binding partners containing post-translationally modified sequences,...
5.7K
Tail-anchoring of Proteins in the ER Membrane
3.0K
Tail-anchored, or TA, proteins are estimated to make up to 3-5% of membrane proteins found in the eukaryotic cell. Such proteins have a single transmembrane domain located approximately 30 amino acid residues upstream from the C-terminal end. As a result, the signal recognition particle (SRP) cannot guide a TA protein to the ER membrane for cotranslational insertion. Hence, they are integrated into the ER membrane post-translationally using their C-terminal end as the anchor. TA proteins...
3.0K


