Characterization of a novel cell penetrating peptide derived from Bag-1 protein

Peptides. 2006 Nov;27(11):2661-9. doi: 10.1016/j.peptides.2006.05.021. Epub 2006 Jun 30.


A highly cationic peptide (BagP), located within the normally expressed human protein Bag-1, was tested for its capacity to act as a cell penetrating peptide. BagP was found to translocate and transport high molecular weight cargos in several cell types, in varying degrees with a preference for adherent cells. The penetration phenomenon was not found to be subject to saturation for the highest amount of peptide tested (100 microM), whereas the time needed for maximum translocation to be achieved, was cell type-dependent. Finally, BagP internalization depends on its charge, cellular metabolism and cell-surface heparan sulfate proteoglycans.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Amino Acid Sequence
  • Cations
  • Cell Line, Tumor
  • Cell Membrane / drug effects
  • Cell Membrane / physiology
  • Cells, Cultured
  • DNA-Binding Proteins / chemistry*
  • DNA-Binding Proteins / metabolism*
  • Dose-Response Relationship, Drug
  • Humans
  • Molecular Sequence Data
  • Peptides / chemistry*
  • Peptides / pharmacokinetics
  • Peptides / physiology*
  • Protein Transport
  • Time Factors
  • Transcription Factors / chemistry*
  • Transcription Factors / metabolism*


  • BCL2-associated athanogene 1 protein
  • Cations
  • DNA-Binding Proteins
  • Peptides
  • Transcription Factors