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Journal of Cell Science, Vol 102, Issue 4 717-722, Copyright © 1992 by Company of Biologists

JOURNAL ARTICLES

Antennapedia homeobox as a signal for the cellular internalization and nuclear addressing of a small exogenous peptide

F Perez, A Joliot, E Bloch-Gallego, A Zahraoui, A Triller and A Prochiantz
CNRS URA 1414, Ecole Normale Superieure, Paris, France.

In a previous study we demonstrated that a homeobox peptide corresponding to the 60 amino acid long DNA-binding region of the Drosophila antennapedia homeo-protein was capable of crossing the plasma membrane of cells in culture. This finding has led us to investigate whether chimeric molecules encompassing the homeobox would behave in a similar manner. We demonstrate here that a peptide of 93 amino acids composed of the homeobox and of the C terminus of Rab3, a small GTP-binding protein, crosses the membrane of myoblasts, myotubes and neurons and is conveyed to their nuclei. This transport is highly efficient, is observed in all the cells present in the culture and occurs at 37 degrees C and 12 degrees C without quantitative peptide degradation. Beyond its theoretical implications for our current views on cellular interactions, this finding could have technical repercussions on the development of drugs with intracellular targets.


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© The Company of Biologists Ltd 1992