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Wilson, D.L.* ; Meininger, I. ; Strater, Z.* ; Steiner, S.* ; Tomlin, F.* ; Wu, J.* ; Jamali, H.* ; Krappmann, D. ; Götz, M.G.*

Synthesis and evaluation of macrocyclic peptide aldehydes as potent and selective inhibitors of the 20S proteasome.

ACS Med. Chem. Letters 7, 250-255 (2016)
Publ. Version/Full Text Postprint Supplement DOI
Open Access Green
This research explores the first design and synthesis of macrocyclic peptide aldehydes as potent inhibitors of the 20S proteasome. Two novel macrocyclic peptide aldehydes based on the ring-size of the macrocyclic natural product TMC-95 were prepared and evaluated as inhibitors of the 20S proteasome. Both compounds inhibited in the low nanomolar range and proved to be selective for the proteasome over other serine and cysteine proteases, particularly when compared to linear analogues with similar amino acid sequences. In HeLa cells, both macrocycles efficiently inhibited activation of nuclear factor-κB (NF-κB) transcription factor by blocking proteasomal degradation of the inhibitor protein IκBα after cytokine stimulation. Due to their covalent mechanism of binding these compounds represent a 1000-fold increase in inhibitory potency over previously reported noncovalently binding TMC-95 analogues. Molecular modeling of the macrocyclic peptides confirms the preference of the large S3 pocket for large, hydrophobic residues and the ability to exploit this to improve selectivity of proteasome inhibitors.
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Publication type Article: Journal article
Document type Scientific Article
Keywords Proteasome ; Aldehyde ; Inhibitor ; Macrocycle ; Multiple Myeloma; Nf-kappa-b; Protein-degradation; Crystal-structure; Multiple-myeloma; S-proteasome; Carfilzomib; Apoptosis; Tmc-95a; Pathway; Complex
e-ISSN 1948-5875
Quellenangaben Volume: 7, Issue: 3, Pages: 250-255 Article Number: , Supplement: ,
Publisher American Chemical Society (ACS)
Publishing Place Washington, DC
Reviewing status Peer reviewed