Amino Acids

, Volume 40, Issue 1, pp 113–122 | Cite as

Peptidomic analysis of the skin secretions of the frog Pachymedusa dacnicolor

  • Erika P. Meneses
  • Oscar Villa-Hernández
  • Lorena Hernández-Orihuela
  • Ruben Castro-Franco
  • Victoria Pando
  • Manuel B. Aguilar
  • Cesar Vicente Ferreira BatistaEmail author
Original article


High-resolution mass spectrometry-based peptidomics has been used to characterize several components in electro-stimulated skin secretions of the endemic Mexican frog Pachymedusa dacnicolor. Peptide mass screening performed in an Orbitrap-XL mass spectrometer showed that P. dacnicolor skin secretions possess 194 different components with molecular masses ranging mainly from 500 to 6,000 Da. Dozens of molecules were partially sequenced including two novel protease inhibitors. Additionally, one posttranslationally modified bradykinin and two novel dermaseptin-like antimicrobial peptides were fully sequenced. The novel peptide named here DMS-DA5 was fully characterized and showed potent antibacterial activity against various bacteria such as Escherichia coli, Bacillus subtilis, Salmonella enterica serovar typhimurium, and Pseudomonas aeruginosa with minimal inhibitory concentrations from 3.10 to 25.0 μM.


Frog skin Antibacterial peptides Peptidomics Mass spectrometry 



This research was supported by grant from the Dirección General de Asuntos del Personal Académico (DGAPA) of the National Autonomous University of Mexico-UNAM (Grant number IN221508 to CVFB).


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Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  • Erika P. Meneses
    • 1
  • Oscar Villa-Hernández
    • 1
  • Lorena Hernández-Orihuela
    • 1
  • Ruben Castro-Franco
    • 2
  • Victoria Pando
    • 3
  • Manuel B. Aguilar
    • 4
  • Cesar Vicente Ferreira Batista
    • 1
    Email author
  1. 1.Unidad de Proteómica-Instituto de BiotecnologíaUniversidad Nacional Autónoma de México (UNAM)CuernavacaMexico
  2. 2.Lab. HerpetologíaCentro de Investigaciones Biológicas, UAEMCuernavacaMexico
  3. 3.Centro de Investigación Sobre Enfermedades Infecciosas, Instituto Nacional de Salud PúblicaCuernavacaMexico
  4. 4.Laboratorio de Neurofarmacología Marina, Departamento de Neurobiologia Celular y MolecularInstituto de Neurobiología, UNAMJuriquillaMexico

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