Galanin (1-16), mouse, porcine, rat is an agonist of the hippocampal galanin receptor, with a Kd of 3 nM.
Galanin (1-16), mouse, porcine, rat, is a synthetic peptide fragment corresponding to the N-terminal 16 amino acids of the galanin neuropeptide, conserved across mouse, pig, and rat species. As a biologically active segment of the full-length galanin, this peptide retains many of the parent molecule's functional properties, making it a valuable tool for investigating galaninergic signaling pathways. Its sequence specificity and cross-species relevance enable detailed studies of receptor interactions, neurochemical modulation, and peptide structure-function relationships in mammalian systems. Researchers utilize this fragment to dissect the contributions of the N-terminal region to galanin's diverse physiological roles, particularly in neurobiology and endocrinology.
Receptor binding studies: The 1-16 fragment of galanin is frequently employed in receptor binding assays to elucidate the specificity and affinity of galanin receptors, such as GALR1, GALR2, and GALR3. By using this peptide in radioligand binding or competition assays, researchers can map the critical determinants for receptor recognition and activation that reside within the N-terminal domain. Such studies are instrumental in characterizing receptor subtypes, understanding ligand-receptor interactions, and developing selective agonists or antagonists for experimental use.
Neurophysiological research: Due to its preserved bioactivity, the peptide serves as a model compound in neurophysiological experiments exploring galanin's modulatory effects on neurotransmission. Investigators utilize it to probe the mechanisms underlying synaptic plasticity, neuronal excitability, and neuropeptide-mediated signal transduction. Its application in electrophysiological recordings or neurochemical assays helps clarify how galanin fragments influence neuronal circuits in central and peripheral nervous systems.
Structure-activity relationship (SAR) analysis: The defined sequence of the 1-16 fragment allows for systematic SAR studies, where modifications to specific residues can be correlated with changes in biological activity. Such analyses provide insight into the minimal structural requirements for receptor activation, peptide stability, and functional selectivity. By comparing the activity profiles of various analogs or truncated peptides, researchers can delineate the essential features responsible for galanin's diverse physiological actions.
Peptide synthesis and analytical method development: As a reference standard, the 1-16 galanin peptide is valuable in the optimization and validation of solid-phase peptide synthesis protocols. Its well-characterized sequence makes it suitable for calibrating chromatographic and mass spectrometric techniques used in quality control, purity assessment, and structural verification of synthetic peptides. Analytical laboratories benefit from its use in developing robust methods for peptide quantification and identity confirmation.
Comparative species studies: The availability of the galanin (1-16) sequence from mouse, porcine, and rat sources supports comparative investigations into species-dependent variations in galaninergic signaling. Researchers leverage this peptide to assess evolutionary conservation of function, differences in receptor pharmacology, and interspecies variability in peptide processing. Such studies are essential for translating findings across animal models and for understanding the broader biological significance of galanin in mammalian physiology.
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