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-Structure paper
| タイトル | Structural Insights into Salinosporamide a Mediated Inhibition of the Human 20S Proteasome. |
|---|---|
| ジャーナル・号・ページ | Molecules, Vol. 30, Issue 6, Year 2025 |
| 掲載日 | 2025年3月20日 |
著者 | Hagen Sülzen / Pavla Fajtova / Anthony J O'Donoghue / Jan Silhan / Evzen Boura / ![]() |
| PubMed 要旨 | The 20S proteasome, a critical component of the ubiquitin-proteasome system, plays a central role in regulating protein degradation in eukaryotic cells. Marizomib (MZB), also known as salinosporamide ...The 20S proteasome, a critical component of the ubiquitin-proteasome system, plays a central role in regulating protein degradation in eukaryotic cells. Marizomib (MZB), also known as salinosporamide A, is a natural γ-lactam-β-lactone compound derived from and is a potent 20S proteasome covalent inhibitor with demonstrated anticancer properties. Its broad-spectrum inhibition of all three proteasome subunits and its ability to cross the blood-brain barrier has made it a promising therapeutic candidate for glioblastoma. In addition to this, MZB also demonstrates significant inhibition against the 20S proteasome of (20S), a protozoan parasite, suggesting its potential for parasitic treatments. Here, we present the cryo-EM structure of the human 20S proteasome in complex with MZB at 2.55 Å resolution. This structure reveals the binding mode of MZB to all six catalytic subunits within the two β-rings of the 20S proteasome, providing a detailed molecular understanding of its irreversible inhibitory mechanism. These findings enhance the therapeutic potential of MZB for both cancer and parasitic diseases at the molecular level and highlight marine-derived natural products in targeting the proteasome for therapeutic applications. |
リンク | Molecules / PubMed:40142161 / PubMed Central |
| 手法 | EM (単粒子) |
| 解像度 | 2.55 Å |
| 構造データ | EMDB-52296, PDB-9hmn: |
| 化合物 | ![]() ChemComp-SA1: |
| 由来 |
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キーワード | HYDROLASE / Inhibitor / 20S proteasome / Salinosporamid A |
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