Chemistry:MG132
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| Systematic IUPAC name
Benzyl [(2S)-4-methyl-1-{[(2S)-4-methyl-1-{[(2S)-4-methyl-1-oxopentan-2-yl]amino}-1-oxopentan-2-yl]amino}-1-oxopentan-2-yl]carbamate | |
| Other names
N-Benzyloxycarbonyl-L-leucyl-L-leucyl-L-leucinal
Z-Leu-Leu-Leu-al | |
| Identifiers | |
3D model (JSmol)
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PubChem CID
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| Properties | |
| C26H41N3O5 | |
| Molar mass | 475.630 g·mol−1 |
| Appearance | White solid |
| Solubility | 100 mM in EtOH and DMSO |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
 verify (what is   ?)
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| Infobox references | |
MG132 is a potent, reversible, and cell-permeable proteasome inhibitor[1] (Ki = 4 nM). It belongs to the class of synthetic peptide aldehydes.[2][3] It reduces the degradation of ubiquitin-conjugated proteins in mammalian cells and permeable strains of yeast by the 26S complex without affecting its ATPase or isopeptidase activities. MG132 activates c-Jun N-terminal kinase (JNK1), which initiates apoptosis. MG132 also inhibits NF-κB activation with an IC50 of 3 μM and prevents β-secretase cleavage.
Molecular mechanism
There are several inhibitors that can readily enter cell and selectively inhibit degradative pathway. It includes peptide aldehydes, such as Cbz-leu-leu-leucinal (MG132), Cbz-leu-leu-norvalinal (MG115) and acetyl-leu-leu-norleucinal (ALLN).[1] These are substrate analogues and potent transition-state inhibitors of chymotrypsin like activity of proteasome machinery.[4][5] The peptide aldehydes are also known to inhibit certain lysosomal cysteine proteases and the calpains hence MG132 may not be exclusive inhibitor of proteasomal pathway.[4]
References
- ↑ 1.0 1.1 Lee, Do Hee; Goldberg, Alfred L (October 1998). "Proteasome inhibitors: valuable new tools for cell biologists" (in en). Trends in Cell Biology 8 (10): 397–403. doi:10.1016/S0962-8924(98)01346-4. PMID 9789328.
- ↑ "Synthetic Study of Peptide Aldehydes". Chemical and Pharmaceutical Bulletin 12 (23): 3106–3113. 1975. doi:10.1248/cpb.23.3106.
- ↑ "Calpain activation is essential for membrane fusion of erythrocytes in the presence of exogenous Ca2+.". Biochem Biophys Res Commun 182 (2): 939–946. 31 January 1992. doi:10.1016/0006-291x(92)91822-8. PMID 1734892.
- ↑ 4.0 4.1 Rock, Kenneth L.; Gramm, Colette; Rothstein, Lisa; Clark, Karen; Stein, Ross; Dick, Lawrence; Hwang, Daniel; Goldberg, Alfred L. (September 1994). "Inhibitors of the proteasome block the degradation of most cell proteins and the generation of peptides presented on MHC class I molecules". Cell 78 (5): 761–771. doi:10.1016/s0092-8674(94)90462-6. ISSN 0092-8674. PMID 8087844.
- ↑ Lee, Do Hee; Goldberg, Alfred L. (1996-11-01). "Selective Inhibitors of the Proteasome-dependent and Vacuolar Pathways of Protein Degradation in Saccharomyces cerevisiae" (in en). Journal of Biological Chemistry 271 (44): 27280–27284. doi:10.1074/jbc.271.44.27280. ISSN 0021-9258. PMID 8910302.
External links
- "MG-132". merck-chemicals.com. http://www.merck-chemicals.com/germany/life-science-research/mg-132/EMD_BIO-474790/p_w_.b.s1LzxMAAAEW02EfVhTm.
- Proeasome inhibitors review
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