β-Amyloid (11-22) is a peptide fragment of β-Amyloid.
β-Amyloid 11-22 is a synthetic peptide fragment corresponding to amino acids 11 through 22 of the full-length amyloid beta (Aβ) protein. As a segment derived from the central hydrophobic core of the Aβ sequence, it is widely recognized for its critical role in amyloid aggregation and fibril formation, phenomena closely associated with neurodegenerative disease research. The unique sequence and physicochemical properties of this peptide make it a valuable tool for investigating the molecular underpinnings of protein misfolding, aggregation pathways, and peptide-membrane interactions. Its relevance extends across biochemistry, structural biology, and neurobiology, offering researchers a precise model for dissecting amyloidogenic processes and their broader implications.
Aggregation studies: In the context of amyloid research, β-Amyloid 11-22 is frequently employed to study the kinetics and mechanisms of peptide aggregation. Its well-defined sequence allows researchers to probe the nucleation and elongation phases of fibril formation, facilitating the identification of critical aggregation-prone motifs. By serving as a model substrate, the peptide enables systematic evaluation of aggregation inhibitors, chaperones, and other modulators, thereby advancing our understanding of protein misfolding disorders at the molecular level.
Structural biology: The peptide's propensity to adopt β-sheet-rich conformations makes it an important model for structural investigations using techniques such as NMR spectroscopy, X-ray crystallography, and cryo-electron microscopy. These studies help elucidate the atomic-level arrangements and intermolecular interactions that govern amyloid assembly. Insights gained from such analyses are instrumental in mapping the structural transitions that underlie fibril formation and in designing synthetic analogs or peptidomimetics with altered aggregation properties.
Membrane interaction assays: β-Amyloid 11-22 is frequently used to explore the interactions between amyloidogenic peptides and lipid bilayers. Its sequence encompasses key residues implicated in membrane binding and disruption, making it a suitable probe for biophysical assays aimed at characterizing peptide-induced membrane perturbation, pore formation, or cytotoxicity in model systems. These investigations provide a mechanistic basis for understanding how amyloid fragments compromise membrane integrity, a process relevant to cellular dysfunction in neurodegenerative pathologies.
Peptide synthesis and method development: The defined length and sequence of this peptide fragment render it an excellent standard for optimizing solid-phase peptide synthesis protocols and purification strategies. Analytical laboratories and peptide chemists utilize β-Amyloid 11-22 to validate chromatographic methods, mass spectrometric analyses, and peptide quantification techniques. Its use as a control or reference material ensures reproducibility and accuracy in both research and industrial peptide production workflows.
Screening of aggregation modulators: Due to its robust aggregation behavior and biological relevance, the peptide serves as a reliable platform for screening small molecules, peptides, or biologics that modulate amyloid assembly. High-throughput assays employing this fragment enable rapid identification and characterization of compounds that influence aggregation kinetics, fibril morphology, or oligomer stability. Such screening efforts are essential for the discovery of novel research tools and for advancing the development of aggregation-targeted strategies in neurodegenerative disease models.
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