IUPAC name
(2S)-2-[[(2S,3R)-3-Amino-2-hydroxy-4-phenylbutanoyl]amino]-4-methylpentanoic acid
Other names
Bestatin; N-[(2S,3R)-3-Amino-2-hydroxy-4-phenylbutyryl]-L-leucine
3D model (JSmol)
ECHA InfoCard 100.055.917
Molar mass 308.38 g·mol−1
Melting point 245 °C (473 °F; 518 K) (decomposes)
S-phrases (outdated) S22 S24/25
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Ubenimex (INN), also known more commonly as bestatin, is a competitive, reversible protease inhibitor. It is an inhibitor of arginyl aminopeptidase (aminopeptidase B),[2] leukotriene A4 hydrolase (a zinc metalloprotease that displays both epoxide hydrolase and aminopeptidase activities),[3] alanyl aminopeptidase (aminopeptidase M/N),[4] leucyl/cystinyl aminopeptidase (oxytocinase/vasopressinase),[5][6] and membrane dipeptidase (leukotriene D4 hydrolase). It is being studied for use in the treatment of acute myelocytic leukemia[7] and lymphedema[8]. It is derived from Streptomyces olivoreticuli.[9] Ubenimex has been found to inhibit the enzymatic degradation of oxytocin, vasopressin, enkephalins, and various other peptides and compounds.

See also


  1. N-((2S,3R)-3-Amino-2-hydroxy-4-phenylbutyryl)-L-leucine at Sigma-Aldrich
  2. Umezawa, H.; Aoyagi, T.; Suda, H.; Hamada, M.; Takeuchi, T. (1976). "Bestatin, an inhibitor of aminopeptidase B, produced by actinomycetes" (29): 97–99.
  3. Muskardin, D.T.; Voelkel, N.F.; Fitzpatrick, F.A. (1994). "Modulation of pulmonary leukotriene formation and perfusion pressure by Bestatin, an inhibitor of leukotriene A4 hydrolase" (48): 131–137.
  4. K Sekine; H Fujii; F Abe (1999). "Induction of apoptosis by Bestatin (ubenimex) in human leukemic cell lines". 13 (5): 729–734. doi:10.1038/sj.leu.2401388.
  5. Nakanishi Y, Nomura S, Okada M, Ito T, Katsumata Y, Kikkawa F, Hattori A, Tsujimoto M, Mizutani S (2000). "Immunoaffinity purification and characterization of native placental leucine aminopeptidase/oxytocinase from human placenta". Placenta. 21 (7): 628–34. doi:10.1053/plac.2000.0564. PMID 10985965.
  6. Naruki M, Mizutani S, Goto K, Tsujimoto M, Nakazato H, Itakura A, Mizuno K, Kurauchi O, Kikkawa F, Tomoda Y (1996). "Oxytocin is hydrolyzed by an enzyme in human placenta that is identical to the oxytocinase of pregnancy serum". Peptides. 17 (2): 257–61. doi:10.1016/0196-9781(95)02124-8. PMID 8801531.
  7. Hirayama, Y; Sakamaki, S; Takayanagi, N; Tsuji, Y; Sagawa, T; Chiba, H; Matsunaga, T; Niitsu, Y (2003). "Chemotherapy with ubenimex corresponding to patient age and organ disorder for 18 cases of acute myelogeneous leukemia in elderly patients--effects, complications and long-term survival". Gan to kagaku ryoho. Cancer & chemotherapy. 30 (8): 1113–8. PMID 12938265.
  8. Tian, W; Rockson, S; Jiang, X; Kim, J; Begaye, A; Shuffle, EM; Tu, AB; Cribb, M; Nepiyushchikh, Z; Feroze, AH; Zamanian, RT; Dhillon, RT; Voelkel, NF; Peters-Golden, M; Kitajewski, J; Dixon, JB; Nicolls, MR (2017). "Leukotriene B4 antagonism ameliorates experimental lymphedema". Science Translational Medicine. 9 (389): eaal3920. doi:10.1126/scitranslmed.aal3920. PMID 28490670.
  9. Bauvois, B; Dauzonne, D (January 2006). "Aminopeptidase-N/CD13 (EC inhibitors: Chemistry, biological evaluations, and therapeutic prospects". Medicinal Research Reviews. 26 (1): 88–130. doi:10.1002/med.20044. PMID 16216010.
  • The MEROPS online database for peptidases and their inhibitors: Bestatin

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