Gala peptideendosomal escape The GALA peptide is a synthetic, 30-amino acid molecule renowned for its pH-sensitive and amphipathic characteristics.2025年8月7日—GALA is a synthetic amphipathic 30 amino acids peptidethat performs both functions. It has the ability to target the lung endothelium and ... Designed to mimic the fusogenic domains of viral proteins, GALA facilitates interaction with cell membranes and plays a crucial role in endosomal escape. This unique property makes it a valuable tool in various biomedical applications, particularly in drug and gene delivery systems, where it enhances cellular uptake and therapeutic efficacyGALA is 30 amino acids long, sufficient to span the lipid bilayer. The EALA repeats are designed to create a hydrophobic face that can allow lipid interaction ....
At its core, the GALA peptide is characterized by its repeating sequences of glutamic acid-alanine-leucine-alanine (EALA). This specific arrangement imbues the peptide with its amphipathic features, meaning it possesses both hydrophilic (water-attracting) and hydrophobic (water-repelling) regions. Crucially, GALA exhibits pH-responsive behavior: at physiological pH (around 7.AbbVie, Illumina and JPM exec comments— ...4), it exists in a more random coil conformation. However, under mildly acidic conditions, such as those found within endosomes (pH 5-6), the peptide undergoes a conformational change, folding into an alpha-helical structure.
This pH-induced transformation is fundamental to its function.Structural Effects and Lipid Membrane Interactions of the pH ... The newly formed alpha-helix exposes its hydrophobic face, allowing it to interact with and perturb lipid bilayers作者：W Li·2004·被引用次数：761—GALA is a 30 amino acid synthetic peptidewith a glutamic acid-alanine-leucine-alanine (EALA) repeat that also contains a histidine and tryptophan residue .... This membrane-perturbing ability leads to pore formation and leakage, effectively facilitating the release of encapsulated substances from endosomes into the cell's cytoplasm.GALA is a pore-forming peptide, undergoes a pH-dependent conformational change and induces leakage of contents from large unilamellar phosphatidylcholine ... The peptide also contains histidine and tryptophan residues, which further contribute to its unique properties and interactions.
The GALA peptide's ability to promote endosomal escape makes it a highly attractive component for advanced drug and gene delivery systems. By effectively delivering therapeutic payloads, such as nucleic acids (like mRNA) or small molecule drugs, past the endosomal barrier, GALA significantly increases the efficiency of intracellular delivery.
* Gene Delivery: GALA has been incorporated into various gene delivery vehicles, including liposomes and polyplexes.The incorporation of GALA peptide into a protein cage for ... For instance, formulations involving GALA peptides have demonstrated significantly higher cellular uptake compared to traditional methods, without inducing significant cytotoxicity. This improved uptake is critical for the effective delivery of genetic material for gene therapy or mRNA-based vaccinesGALA, Pore-Forming Peptide - 1 mg.
* Drug Delivery: The peptide's fusogenic properties can also be leveraged to enhance the delivery of small molecule drugs or antibody-drug conjugates. By aiding in endosomal escape, GALA can increase the bioavailability and potency of drugs that would otherwise be degraded within the endosome. Research has shown that incorporating GALA into nanobody-drug conjugates can improve their cytotoxicity, making them more effective against target cells.
* Targeted Delivery: Modifications to the GALA peptide, such as PEGylation, have been explored to enhance its targeting capabilities, for example, to lung endothelium, further refining its application in localized therapies.
The canonical GALA peptide sequence is typically represented as WEAA L A EAL A EAL A EAL A EAL A EAL A EAL A EAL A EAL A EAL A, totaling 30 amino acids. Variations, often denoted by suffixes like GALA (TFA), might refer to different counterions or purification states, but the core sequence and its pH-responsive, amphipathic nature remain consistent2008年12月8日—Peptideswere synthesized on an Applied Biosystems Pioneerpeptidesynthesizer using Fmoc/HATU chemistry. MonomericGALAwas synthesized as .... The precise sequence and its repeating EALA units are key to its designed functionality, allowing it to span lipid bilayers and interact effectively with cellular membranes. While research primarily focuses on its role in drug and gene delivery, its fundamental properties as a pore-forming and fusogenic peptide continue to be explored in various biological contexts.
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