pb-157-peptide The Antennapedia peptide, also widely known as Penetratin, is a remarkable 16-amino acid peptide derived from the homeodomain of the *Drosophila* Antennapedia protein. Its primary significance lies in its potent cell-penetrating capabilities, allowing it to efficiently translocate across cell membranes through non-endocytotic mechanisms.TheAntennapedia peptide, also known as penetratin is a 16-mer peptide (RQIKIWFQNRRMKWKK-amide) derived from the third helix of the Drosophila Antennapedia ... This inherent ability makes it a valuable tool in various biological and biotechnological applications, particularly for the intracellular delivery of molecules like DNA, RNA, and lipids.
At its core, the Antennapedia peptide is a sequence of 16 amino acids, often represented as RQIKIWFQNRRMKWKK. This specific amino acid arrangement, originating from the third helix of the Antennapedia homeodomain, is responsible for its characteristic cell permeability作者：A Joliot·1991·被引用次数：1040—Thus, our results demonstrate that neurons possess an efficient uptake system for theantennapediahomeoboxpeptideand suggest that binding of pAntp to .... Unlike many other molecules that require specific receptors or complex endocytic pathways to enter cells, Penetratin appears to interact directly with the lipid bilayer of cell membranes, facilitating its passage into the cytoplasm. This direct interaction is a key differentiator and a major reason for its utility in research.Antennapedia Peptideis a peptide consisting of 16 amino acid residues derived from the homologous domain of the 60 amino acid sequence of the Drosophila ...
The cell-penetrating property of the Antennapedia peptide has opened doors for its use as a peptide delivery vehicle. Researchers have explored its capacity to transport a range of cargo into cells, including:
* Nucleic Acids: Delivering DNA and RNA sequences for gene therapy or experimental manipulation.
* Proteins and Peptides: Introducing therapeutic proteins or signaling molecules directly into target cellsAntennapedia (43-58) - Penetratin Peptide.
* Lipids and Small Molecules: Facilitating the entry of various compounds that might otherwise struggle to cross the cell membrane.
Beyond its role as a transporter, studies have also investigated the intrinsic biological activities of the Antennapedia peptide itself. For instance, some research suggests that Antennapedia homeobox peptides can influence neural development, promoting neurite outgrowth and branching, indicating potential roles in neuroscience and regenerative medicine.
To enhance its utility or tailor it for specific applications, various modifications of the Antennapedia peptide have been developed. These can include:
* Labeled Peptides: Incorporating fluorescent tags (like FAM or FITC) allows for easy tracking and visualization of the peptide's cellular uptake and distributionTheAntennapedia peptide, also known as penetratin is a 16-mer peptide (RQIKIWFQNRRMKWKK-amide) derived from the third helix of the Drosophila Antennapedia ....
* Modified Sequences: Creating analogues or shorter derivatives to optimize delivery efficiency, reduce potential toxicity, or target specific cellular pathways.
* Conjugation: Attaching the peptide to other molecules, such as drug carriers or targeting ligands, to create more sophisticated delivery systems1KZ2: Solution structure of the third helix of Antennapedia ....
While the Antennapedia peptide has shown significant promise, it's important to note that its use, like any biological tool, requires careful consideration of experimental design and potential downstream effectsAntennapedia Peptide(Penetratin peptide) TFA is a 16 amino acid peptide, originally derived from the 60 amino acid long homeodomain of the Drosophila .... Ongoing research continues to refine its applications and explore new therapeutic avenues.
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