3630. Epoxomicin
Nomenclature
CAS number: 134381-21-8
N-Acetyl-N-methyl-l-isoleucyl-l-isoleucyl-N-[(1S)-3-methyl-1[[(2R)-2-methyloxiranyl]carbonyl]butyl]-l-threoninamide; BU-4061T. C28H50N4O7; mol wt 554.72.
C 60.63%, H 9.09%, N 10.10%, O 20.19%.
Description and references
α′,β′-epoxyketone peptide which specifically inhibits proteasome activity. Isoln from actinomycetes: M. Konishi et al., EP 411660; eidem, US 5071957 (both 1991 to Bristol-Myers); and characterization: M. Hanada et al., J. Antibiot. 45, 1746 (1992). Total synthesis: N. Sin et al., Bioorg. Med. Chem. Lett. 9, 2283 (1999). Proteasome selectivity and antiinflammatory activity: L. Meng et al., Proc. Natl. Acad. Sci. USA 96, 10403 (1999). Crystal structure and mechanism of selectivity: M. Groll et al., J. Am. Chem. Soc. 122, 1237 (2000). Use as inhibitor to modulate antigen presentation: K. Schwarz et al., J. Immunol. 164, 6147 (2000).
