8OI1
Yeast 20S proteasome in complex with a photoswitchable cepafungin derivative (transCep4)
Summary for 8OI1
| Entry DOI | 10.2210/pdb8oi1/pdb |
| Descriptor | Proteasome subunit alpha type-2, Proteasome subunit beta type-4, Proteasome subunit beta type-5, ... (19 entities in total) |
| Functional Keywords | proteasome, syrbactins, photoswitchable lipid, binding analysis, hydrolase |
| Biological source | Saccharomyces cerevisiae (baker's yeast) More |
| Total number of polymer chains | 28 |
| Total formula weight | 734192.45 |
| Authors | Morstein, J.,Amatuni, A.,Schuster, A.,Kuttenlochner, W.,Ko, T.,Groll, M.,Adibekian, A.,Renata, H.,Trauner, D.H. (deposition date: 2023-03-21, release date: 2023-12-27, Last modification date: 2024-11-06) |
| Primary citation | Morstein, J.,Amatuni, A.,Shuster, A.,Kuttenlochner, W.,Ko, T.,Abegg, D.,Groll, M.,Adibekian, A.,Renata, H.,Trauner, D.H. Optical Control of Proteasomal Protein Degradation with a Photoswitchable Lipopeptide. Angew.Chem.Int.Ed.Engl., 63:e202314791-e202314791, 2024 Cited by PubMed Abstract: Photolipids have emerged as attractive tools for the optical control of lipid functions. They often contain an azobenzene photoswitch that imparts a cis double-bond upon irradiation. Herein, we present the application of photoswitching to a lipidated natural product, the potent proteasome inhibitor cepafungin I. Several azobenzene-containing lipids were attached to the cyclopeptide core, yielding photoswitchable derivatives. Most notably, PhotoCep4 exhibited a 10-fold higher cellular potency in its light-induced cis-form, matching the potency of natural cepafungin I. The length of the photolipid tail and distal positioning of the azobenzene photoswitch with respect to the macrocycle is critical for this activity. In a proteome-wide experiment, light-triggered PhotoCep4 modulation showed high overlap with constitutively active cepafungin I. The mode of action was studied using crystallography and revealed an identical binding of the cyclopeptide in comparison to cepafungin I, suggesting that differences in their cellular activity originate from switching the tail structure. The photopharmacological approach described herein could be applicable to many other natural products as lipid conjugation is common and often necessary for potent activity. Such lipids are often introduced late in synthetic routes, enabling facile chemical modifications. PubMed: 38109686DOI: 10.1002/anie.202314791 PDB entries with the same primary citation |
| Experimental method | X-RAY DIFFRACTION (2.95 Å) |
Structure validation
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