Inhibitor peptide corresponding to last 10 amino acids of the C-terminus of the GluA2 AMPA receptor subunit that inhititss binding of GluA2 (at the C-terminal PDZ site) to glutamate receptor interacting protein (GRIP), AMPA receptor binding protein (ABP) and protein interacting with C kinase (PICK1). Increases AMPA receptor-mediated currents amplitude and blocks long-term depression (LTD).
pep2-SVKI is a synthetic peptide compound designed for advanced research applications in the field of molecular neuroscience and protein-protein interaction studies. As a short, sequence-specific peptide, it is derived from a functional motif of synaptic proteins and has been utilized as a molecular tool to probe intracellular signaling pathways and regulatory mechanisms. Its structure enables precise modulation of target protein interactions, making it a valuable asset for dissecting cellular processes that underlie synaptic transmission and plasticity. The unique sequence of pep2-SVKI confers selectivity in binding, allowing researchers to investigate specific domains within complex protein networks relevant to neuronal communication and signal transduction.
Protein-Protein Interaction Studies: In the context of neurobiological research, pep2-SVKI serves as a competitive inhibitor for key protein-protein interactions, particularly those involving postsynaptic density proteins such as PSD-95. By mimicking endogenous binding motifs, it enables the selective blockade of interactions between synaptic scaffolding proteins and their partners. This targeted inhibition is instrumental in elucidating the molecular determinants of synaptic assembly, receptor clustering, and the dynamic regulation of excitatory synapses, thereby advancing the understanding of neuronal connectivity and signaling fidelity.
Intracellular Signaling Pathway Analysis: The peptide is frequently employed to dissect intracellular signaling cascades that rely on modular protein domains, such as PDZ domains. By introducing pep2-SVKI into neuronal or heterologous cell systems, researchers can selectively perturb the recruitment of signaling complexes, enabling detailed mapping of downstream effectors and regulatory checkpoints. Such experimental approaches are essential for clarifying the sequence of molecular events that govern synaptic strength, plasticity, and adaptation in response to external stimuli.
Peptide-Functional Studies: As a research tool, pep2-SVKI facilitates the exploration of structure-function relationships within peptide motifs and their corresponding binding domains. Through systematic mutagenesis or sequence modification, investigators can assess the specificity and affinity of peptide-mediated interactions, contributing to the rational design of peptide-based modulators. These studies provide foundational insights for the development of novel molecular probes and enhance the mechanistic understanding of protein domain recognition.
Neuropharmacological Screening: The peptide's ability to modulate synaptic protein interactions makes it a valuable component in high-throughput screening assays aimed at identifying small molecules or biologics that influence synaptic architecture. By serving as a reference inhibitor or positive control, pep2-SVKI enables the validation of assay systems and the benchmarking of candidate compounds. This application supports drug discovery efforts focused on synaptic function, neuroprotection, and the regulation of excitatory neurotransmission.
Cellular Imaging and Localization Studies: Fluorescently labeled derivatives of pep2-SVKI are utilized in advanced imaging experiments to track the localization and dynamics of target protein complexes within living cells. By visualizing the spatial distribution and temporal changes of protein assemblies in response to peptide treatment, researchers gain critical insights into the subcellular mechanisms that orchestrate synaptic organization and signal propagation. These imaging-based applications are essential for correlating molecular interactions with functional outcomes in neuronal and non-neuronal systems.
Overall, pep2-SVKI is a versatile peptide tool that supports a broad spectrum of biochemical and cellular investigations, particularly those centered on synaptic biology, protein interaction networks, and the mechanistic analysis of signaling pathways. Its application across multiple experimental platforms underscores its value in advancing molecular neuroscience and protein biochemistry research.
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