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Titin-derived peptides as processing time markers in dry-cured ham.

Marta Gallego1, Leticia Mora1, M Concepción Aristoy1

  • 1Instituto de Agroquímica y Tecnología de Alimentos (CSIC), Avenue Agustín Escardino 7, 46980 Paterna (Valencia), Spain.

Food Chemistry
|August 24, 2014
PubMed
Summary

Researchers identified specific peptides in Spanish dry-cured ham that indicate processing time. These findings can help monitor the dry-curing process using biomarkers.

Keywords:
BiomarkerConnectinDry-cured hamMass spectrometryPeptidesProteolysisTitin

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Area of Science:

  • Food Science
  • Proteomics
  • Biochemistry

Background:

  • Spanish dry-cured ham production involves complex proteolysis.
  • This process generates peptides and amino acids crucial for ham's texture and flavor.
  • Titin is a giant protein present in muscle tissue.

Purpose of the Study:

  • To investigate the degradation of the protein titin during Spanish dry-cured ham processing.
  • To identify potential biomarkers for monitoring the dry-curing duration.

Main Methods:

  • Proteomic tools were utilized to analyze titin degradation.
  • Nanoliquid chromatography coupled to tandem mass spectrometry (nanoLC-MS/MS) was employed.
  • Matrix-assisted laser desorption/ionization–time of flight mass spectrometry (MALDI-TOF MS) was used for confirmation.

Main Results:

  • A total of 320 peptides were identified throughout the dry-curing process.
  • Four specific peptides (KDEAAKPKGPIKGVAKK, KKLRPGSGGEK, KNTDKWSECAR, ISIDEGKVL) were exclusively identified at 9 months of curing.
  • These unique peptides were confirmed using both nanoLC-MS/MS and MALDI-TOF MS.

Conclusions:

  • The identified peptides can serve as potential biomarkers for the processing time of Spanish dry-cured ham.
  • Proteomic analysis provides valuable insights into the biochemical changes during dry-curing.
  • This research contributes to quality control and process optimization in dry-cured meat production.