Efficient delivery of cyclic peptides into mammalian cells with short sequence motifs.

Efficient delivery of cyclic peptides into mammalian cells with short sequence motifs.
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DOI:
10.1021/cb3005275
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发表时间:
2013-02-15
影响因子:
4
通讯作者:
Pei, Dehua
Pei, Dehua
中科院分区:
生物学2区
文献类型:
--
作者:
Qian, Ziqing;Liu, Tao;Liu, Yu-Yu;Briesewitz, Roger;Barrios, Amy M.;Jhiang, Sissy M.;Pei, Dehua

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Cyclic peptides hold great potential as therapeutic agents and research tools, but their broad application has been limited by poor membrane permeability. Here, we report a potentially general approach for intracellular delivery of cyclic peptides. Short peptide motifs rich in arginine and hydrophobic residues (e.g., FΦRRRR, where Φ is L-2-naphthylalanine), when embedded into small- to medium-sized cyclic peptides (7–13 amino acids), bound to the plasma membrane of mammalian cultured cells and were subsequently internalized by the cells. Confocal microscopy and a newly developed peptide internalization assay demonstrated that cyclic peptides containing these transporter motifs were translocated into the cytoplasm and nucleus at efficiencies 2–5-fold higher than that of nonaarginine (R9). Furthermore, incorporation of the FΦRRRR motif into a cyclic peptide containing a phosphocoumaryl aminopropionic acid (pCAP) residue generated a cell permeable, fluorogenic probe for detecting intracellular protein tyrosine phosphatase activities.
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