When exploring the complex world of pe Molecular Weight. 4272.70 ; Formula. C189H284N54O58S ; CAS No. 303052-45-1 ; Appearance. Solid ; Color. White to off-white. ptides, understanding the neuropeptide y chemical structure provides a fascinating look into molecular biology. As a researcher and enthusiast of peptide synthesis, I have found that NPY—a highly conserved 36-amino acid neuropeptide—serves as a cornerstone for studying protein foldin by H Kang · 2023 · Cited by 27 — Here, we report the cryo-electron microscopy structures of the PYY(3–36)‒Y2R‒Gi and NPY‒Y2R‒Gi complexes. Using cell-based assays, molecular g and receptor interaction.
Molecular Composition and Characteristics
At its core, Neuropeptide Y (NPY) is a peptide abundantly distributed throughout the central and peripheral nervous systems. From a technical standpoint, the chemical structure is defined by its sp Schematic outline of the human NPY gene, mRNA and protein precursor. In the gene, filled boxes show the coding parts and open boxes show non-coding parts. GKR ecific Schematic outline of the human NPY gene, mRNA and protein precursor. In the gene, filled boxes show the coding parts and open boxes show non-coding parts. GKR molecular formula. While variations exist depending on the species and modifications, a standard representation is C190H287N55O57. Other analytical data for specific variants, such as human NPY, often list the molecular formula C189H285N55O57S, highlighting the importance of sulfur-containing residues in its stability.
The primary sequence is well-documented in biochemical literature. The amino acid sequence is notably: *Tyr-Pro-Ser-Lys-Pro-Asp-Asn-Pro-Gly-Glu-Asp-Ala Neuropeptide Y and Related Peptides - ACNP -Pro-Ala-Glu-Asp-Leu-Ala-Arg-Tyr-Tyr-Ser-Ala-Leu*. This sequence allows the molecule to maintain its biological functionality. A critical feature of this 36-amino acid peptide is its C-terminal α-amide structure, which is essential for its stability and binding affinity.
The PP-Fold and Conformational Dynamics
One of the most intriguing aspects of the NPY molecule is its three-dimensional structure, often referred to as the PP-fold. This characteristic architecture is defined by a hairpin-like shape, featuring a type II beta-turn that brings the N- and C-termini into close proximity.
Neuropeptide Y human NPYResearch into the structural basis of signaling—such as the study of PYY(3–36)−Y2R−Gi complexes—has revealed that the molecule is not static. Specifically, five amino acids at the C-terminus of NPY form an extended conformation that fits precisely into the binding pockets of its receptors. This interaction is a primary focus for those investigating how the PYY structure is characterized by a C-terminal amidated α-helix to facilitate molecular docking.
Comparative Biochemistry: NPY vs. PYY
When analyzing the Neuropeptide Y (NPY) molecule, chemical structure, it is helpful to compare it to related family members like Peptide YY (PYY) and Pancreatic Polypeptide (PP). These peptides share high sequence homology, yet their unique folding patterns dictate their specific roles. Whether studying Porcine neuropeptide Y (pNPY) or the human NPY gene products, the commonality remains the conserved 36-residue count and the reliance on the C-terminal α-amide structure.
Observations on Laboratory Handling
For those interested in the physical properties of these compounds, the appearance of Neuropeptide Y is typically a white to off-white solid. When preparing samples, the solubility profile is a key parameter; for instance, high-purity variants are often soluble in ultrapure water at concentrations under 1mg/ml.
Understanding the chemical nature of this molecule—from its molecular formula C189H284N54O58S (in specific modified forms) to its intricate three-dim Neuropeptide Y family of peptides: Structure, anatomical ensional structures—enhances our appreciation for how effectively this peptide functions within its native environments. Whether you are analyzing the human NPY sequence or investigating the structural mechanics of the Y1 receptor, the precision of this 36-residue chain remains a testament to the complexity of biological signaling.
*Disclaimer: This content is for informational purposes for research enthusiasts and does not constitute medical advice or recommendations for human consumption.*