In the realm of biochemical research, the study of neuropeptides remains a cornerstone for understanding cellular signaling. Among these, Substance P stands out as a highly conserved molecule across various species. For those of us who track peptide products for research purposes, understanding the fundamental architecture of this molecule is essential.
The Structural Composition: Substance P Peptide Sequence
At its core, Substance P (SP) is defined as an 11-amino acid-long neuropeptide. Its structural integrity is maintained by a specific arrangement of amino acids that dictate its biological behavior. When examining the amino acid sequence, researchers typically refer to the standard representation: Arg-Pro-Lys-Pro-Gln-Gln-Phe-Phe-Gly-Leu-Met-NH2.
In laboratory documentation, this is often abbreviated using the single-letter code: RPKPQQFFGLM. This sequence is crucial for it Substance P Release by Sensory Neurons Triggers Dendritic Cell s identification and synthesis. The molecule is characterized by a C-terminal amide, which is a common modification in bioactive peptides, often Jul 27, 2011—Substance P(SP; CAS: 33507-63-0) is an undecapeptide with anamino acid sequenceof. Arg-Pro-Lys-Pro-Gln-Gln-Phe-Phe-Gly-Leu-Met-. NH2. It Read more denoted as {ARG}{PRO}{LYS}{PRO}{GLN}{GLN}{PHE}{PHE}{GLY}{LEU}{MET}-NH.
Chemical Properties and Molecular Data
For those maintaining precise logs of analytical standards, the molecular details are verifiable through various chemical databases. The molecular formula for the native form is generally cited as C63H98N18O13S. However, variations exist depending on the synthesis process or specific analogs, such as the [Sar9] variant, which carries the formula C64H100N18O13S.
The Human Substance P peptide is a synthetic blocking peptide often utilized in experimental settings to study receptor interaction. Because it is a peptide mainly secreted by neurons, its role in systemic signaling is extensive. It functions as a vasoactive neuropeptide and is widely recognized as a sensory neuropeptide and inflammatory mediator.
Insights into Synthesis and Expression
The complexity of this peptide is further highlighted b Substance P corresponds toamino acid 58-68 of neurokinin A precursor. Neurokinin A belongs to the tachykinin family, peptides that are potent vasodilators Read more y its genetic origin. The Substance P sequence is derived from the *PPT-A* gene. Interestingly, these sequences are expressed in three distinct mRNAs generated through differential RNA splicing, allowing for diverse physiological responses.
When comparing sequences, one by T Hökfelt·2001·Cited by 448—BV, blood vessel; CB, calbindin; CGRP, calcitonin gene-related peptide; ChAT, choline acetyltransferase; CM, circular muscle; CR, calretinin; DRG, dorsal root Read more might encounter related molecules like neurokinin A. It is worth noting that Substance P corresponds to amino acid 58-68 of neurokinin A precursor, illustrating the structural evolutionary links within the tachykinin family. Other complex derivatives, such as GWTLNS by SE Leeman·Cited by 120—Substance Phad been detected as early as 1931 (von Euler and Gaddum, 1931), but had resisted purification until the work of Chang and Leeman (1970).Read more AGYLLGPQQFFGLM-NH2 (a combination peptide), are also documented in literature for specific binding studies.
Personal Perspective on Research Utility
From my experience Substance P Release by Sensory Neurons Triggers Dendritic Cell in handling high-purity peptides, verifying the sequence via HPLC (High-Performance Liquid Chromatography) is the first step in ensuring consistency. Whether one is investigating BV (blood vessel) interactions or general neuro-signaling, the purity—often required to be ≥95%—is non-negotiable.
Bovine substance P was historically significant in the early isolation and characterization of this molecule. Today, we rely on the standardized RPKPQQFFGLM sequence to ensure reproducibility in experiments. As a peptide that is highly conserved across the animal kingdom, its study continues to provide a window into the fundamental mechanisms of sensory and peripheral nervou gene. The deduced amino acid sequence of substance P is as follows:Arg Pro Lys Pro Gln Gln Phe Phe Gly Leu Met(RPKPQQFFGLM) with an amidation at the C Read more s systems.
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*Disclaimer: This article is for informational purposes for research enthusiasts and does not constitute medical, prescription, or human-use advice. Always adhere to laboratory safety protocols when handling research-grade chemicals.*