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Click on the links to the left to view different structural aspects of papain. PDB code 9pap

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3D structures of papain

Updated on 08-December-2021


  1. [1] Papaya's Nutrition Facts
  2. [2] Ameridan International
  3. [3] Uniprot
  4. 4.0 4.1 [4] 9PAP PDB
  5. 5.0 5.1 5.2 [5] Sigma Aldrich
  6. 6.0 6.1 6.2 [6] Worthington
  7. 7.0 7.1 Kamphuis IG, Kalk KH, Swarte MB, Drenth J. Structure of papain refined at 1.65 A resolution. J Mol Biol. 1984 Oct 25;179(2):233-56. PMID:6502713
  8. [7] RCSB PDB
  9. [8] Jane S. Richardson
  10. [9] The Structure of Papain
  11. Berger A, Schechter I. Mapping the active site of papain with the aid of peptide substrates and inhibitors. Philos Trans R Soc Lond B Biol Sci. 1970 Feb 12;257(813):249-64. PMID:4399049
  12. Berger A, Schechter I. Mapping the active site of papain with the aid of peptide substrates and inhibitors. Philos Trans R Soc Lond B Biol Sci. 1970 Feb 12;257(813):249-64. PMID:4399049
  13. Wang J, Xiang YF, Lim C. The double catalytic triad, Cys25-His159-Asp158 and Cys25-His159-Asn175, in papain catalysis: role of Asp158 and Asn175. Protein Eng. 1994 Jan;7(1):75-82. PMID:8140097
  14. [10]Shokhen M, N Khazanov, and A Albeck. 2009. Challenging a paradigm: theoretical calculations of the protonation state of the Cys25-His159 catalytic diad in free papain. Proteins. 77(4):916-26.
  15. [11]Noble MA, Gul S, Verma CS, Brocklehurst K. 2000. Ionization characteristics and chemical influences of aspartic acid residue 158 of papain and caricain determined by structure-related kinetic and computational techniques: multiple electrostatic modulators of active-centre chemistry. Biochem J. 2000 351: 723-33.
  16. 16.0 16.1 [12] University of Maine
  17. [13] Harrison, M.J., N.A. Burton, and I.H. Hillier. 1997. Catalytic Mechanism of the Enzyme Papain: Predictions with a Hybrid Quantum Mechanical/Molecular Mechanical Potential. J. Am. Chem. Soc. 119: 12285-12291
  18. [14] Schröder, E., C. Phillips, E. Garman, K. Harlos, C. Crawford. 1997. X-ray crystallographic structure of a papain-leupeptin complex. FEBS Letters 315: 38-42
  19. LaLonde JM, Zhao B, Smith WW, Janson CA, DesJarlais RL, Tomaszek TA, Carr TJ, Thompson SK, Oh HJ, Yamashita DS, Veber DF, Abdel-Meguid SS. Use of papain as a model for the structure-based design of cathepsin K inhibitors: crystal structures of two papain-inhibitor complexes demonstrate binding to S'-subsites. J Med Chem. 1998 Nov 5;41(23):4567-76. PMID:9804696 doi:10.1021/jm980249f
  20. Valadares NF, Dellamano M, Soares-Costa A, Henrique-Silva F, Garratt RC. Molecular determinants of improved cathepsin B inhibition by new cystatins obtained by DNA shuffling. BMC Struct Biol. 2010 Sep 30;10:30. PMID:20920298 doi:10.1186/1472-6807-10-30
  21. Myers MC, Shah PP, Beavers MP, Napper AD, Diamond SL, Smith AB 3rd, Huryn DM. Design, synthesis, and evaluation of inhibitors of cathepsin L: Exploiting a unique thiocarbazate chemotype. Bioorg Med Chem Lett. 2008 Jun 15;18(12):3646-51. Epub 2008 May 1. PMID:18499453 doi:10.1016/j.bmcl.2008.04.065
  22. Tsuge H, Nishimura T, Tada Y, Asao T, Turk D, Turk V, Katunuma N. Inhibition mechanism of cathepsin L-specific inhibitors based on the crystal structure of papain-CLIK148 complex. Biochem Biophys Res Commun. 1999 Dec 20;266(2):411-6. PMID:10600517 doi:10.1006/bbrc.1999.1830
  23. Beavers MP, Myers MC, Shah PP, Purvis JE, Diamond SL, Cooperman BS, Huryn DM, Smith AB 3rd. Molecular docking of cathepsin L inhibitors in the binding site of papain. J Chem Inf Model. 2008 Jul;48(7):1464-72. Epub 2008 Jul 4. PMID:18598021 doi:10.1021/ci800085c
  24. Stubbs MT, Laber B, Bode W, Huber R, Jerala R, Lenarcic B, Turk V. The refined 2.4 A X-ray crystal structure of recombinant human stefin B in complex with the cysteine proteinase papain: a novel type of proteinase inhibitor interaction. EMBO J. 1990 Jun;9(6):1939-47. PMID:2347312
  25. [15] RX
  26. 26.0 26.1 [16] Web MD
  27. [17] National PBM Drug Monograph
  28. [18] Enzymes Try to Grab the Spotlight
  29. Skern T, Fita I, Guarne A. A structural model of picornavirus leader proteinases based on papain and bleomycin hydrolase. J Gen Virol. 1998 Feb;79 ( Pt 2):301-7. PMID:9472614

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