期刊
CHEMBIOCHEM
卷 22, 期 2, 页码 340-344出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cbic.202000473
关键词
BCL-2 family; BFL-1; selective covalent inhibitors; sulfonium-tethered peptide
资金
- National Natural Science Foundation of China [21778009, 81701818, 21977010, 51803006]
- Shenzhen Science and Technology Innovation Committee [JCYJ20170412150609690, KQJSCX20170728101942700, JCYJ20170807144449135]
- China Postdoctoral Science Foundation [2019M650297]
- High-Performance Computing Platform of Peking University
Anti-apoptotic BCL-2 family proteins are important targets for cancer treatment, and targeting the BH3-binding pockets can reactivate apoptosis. A novel sulfonium-tethered peptide cyclization strategy was developed to selectively bind to the cysteine(s) of target proteins, leading to the successful construction of a BFL-1 peptide inhibitor, B4-MC, showing promising growth inhibition of BFL-1 over-expressed cancer cell lines.
Anti-apoptotic B cell lymphoma 2 (BCL-2) family proteins are proven targets for human cancers. Targeting the BH3-binding pockets of these anti-apoptotic proteins could reactivate apoptosis in BCL-2-depedent cancers. BFL-1 is a BCL-2 family protein overexpressed in various chemoresistant cancers. A unique cysteine at the binding interface of the BH3 and BFL-1 was previously proven to be an intriguing targeting site to irreversibly inhibit BFL-1 functions with stabilized cyclic peptide bearing a covalent warhead. Recently, we developed a sulfonium-tethered peptide cyclization strategy to construct peptide ligands that could selectively and efficiently react with the cysteine(s) of target proteins near the interacting interface. Using this method, we constructed a BFL-1 peptide inhibitor, B4-MC, that could selectively conjugate with BFL-1 both in vitro and in cell. B4-MC showed good cellular uptake, colocalized with BFL-1 on mitochondria, and showed obvious growth inhibition of BFL-1 over-expressed cancer cell lines.
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