Issue
Korean Journal of Chemical Engineering,
Vol.23, No.6, 972-976, 2006
Hydrolysis of raw hide using proteolytic enzyme extracted from papaya latex
Crude proteolytic enzyme was extracted from papaya latex using two solvents, water and phosphate buffer pH 6. The yield of extracted enzyme using water as a solvent was similar to that using phosphate buffer. Following the solvent extraction, the extracted enzyme was precipitated in 45 wt% saturated ammonium sulfate solution. The yield and activity of precipitated enzyme considerably decreased. Crude proteolytic enzyme extracted using water as an extracting liquid was, therefore, selected to use in gelatin production from raw hide hydrolysis, comparing to the use of commercial papain. The effects of hydrolysis conditions on gelatin recovery and properties of obtained gelatin were investigated. The optimum conditions for the activities of both crude extracted enzyme and commercial papain were at 75 ℃ and pH 7. At this condition, the highest percentages of gelatin recovery were obtained from raw hide hydrolysis reactions. The gelatin recovery and gel strength of gelatin obtained from crude extracted enzyme and commercial papain hydrolysis were similar. This proved that crude extracted enzyme from papaya latex could be effectively used in gelatin production, instead of the use of commercial papain, with a comparatively low cost.
[References]
  1. Aspmo SI, Horn SJ, Eijsink VGH, Process Biochem., 40, 1957, 2005
  2. Belter P, Cussler EL, Hu W, Bioseparation, John Wiley & Sons, New York, 1998
  3. BS EN ISO 9665:2000. “Adhesives-animal glues-methods of sampling and testing (ISO 9665:1998)”, 2000
  4. Chomarat N, Robert L, Seris JL, Kern P, Enzyme Microb. Technol., 16, 756, 1994
  5. Damrongsakkul S, Ratanathammapan K, Komolpis K, Tanthapanichakoon W, “Enzymatic hydrolysis of raw hide using papain and nuetrase,” to be submitted to Bioresource Technol., 2006
  6. Friess W, Eur. J. Pharm. Biopharm., 45, 113, 1998
  7. Gomez-Guillen MC, Gimenze B, Montero P, Food Hydrocolloids, 19, 1, 2005
  8. Guerard F, Dufosse L, De La Broise D, Binet A, J. Mol. Catal. B-Enzym., 11, 1051, 2001
  9. Oh KD, Kim C, Korean J. Chem. Eng., 4, 105, 1987
  10. Park CY, Ryu YW, Kim C, Korean J. Chem. Eng., 18(4), 475, 2001
  11. Pitpreecha S, Gelatin production from large animal raw hide using proteolytic enzyme extracted from papaya latex, Master Dissertation, Department of Chemical Engineering, Faculty of Engineering, Graduate School, Chulalongkorn University, 2006
  12. Ratanathammapan K, Effects of enzymatic conditions on gelatin production from raw hide, Master Dissertation, Department of Chemical Engineering, Faculty of Engineering, Graduate School, Chulalongkorn University, 2005
  13. Sharphouse JH, Applied protein chemistry, Applied Science Publishers, London, 1980
  14. Simeonova LS, Dalev PG, Waste Manage., 16, 765, 1996
  15. Taylor MM, Diefendorf EJ, Foglia TA, Bailey DG, Feairheller SH, JALA, 84, 71, 1989
  16. Walker JM, The protein protocols handbook, Humana Press, New Jersey, 1996
  17. Walsh G, Proteins: Biochemistry and biotechnology, John Wiley & Sons, New York, 2002
  18. Wuttiwiangtham T, Purification and characterization of papain from latex of papaya (Carica papaya Linn.), Master Dissertation, Department of Biotechnology, Faculty of Science, Graduate School, Chulalongkorn University, 1993