In the realm of advanced biochemical research, peptides serve as fundamental tools for understanding complex physiological pathways. Among these, CCK octapeptide sulfated stands out as a critical subject of study. As an enthusiast and observer of peptide research, I have found that understanding the nuances of these compounds r CCK Octapeptide (sulfated) (ammonium salt) equires a deep dive into their structural properties and their roles in biological systems.
Understanding the Structure and Nature of CCK Octap Cholecystokinin Octapeptide (26-33) Non-Sulfated / CCK- eptide Sulfated
The CCK octapeptide sulfated—often referred to in literature as CCK 8 octapeptide, sulfated or simply CCK-8S—is an endogenous C-terminal octapeptide of CCK. This rapid-acting amino acid polypeptide hormone is essentially a fragment of the larger cholecystokinin molecule.
A defining feature of this molecule is its Cholecystokinin sulfated tyrosyl residue at position 27. This specific sulfation is what distinguishes it from its non-sulfated counterpart. In the scientific community, it is widely recognized that CCK octapeptide sulfated is a peptide hormone found in the intestine and brain that plays a significant role in various signaling processes. Structurally, it is characterized by a molecular weight of 1143.3 Da and, for research purposes, is typically sought at a purity >97% to ensure accurate experimental outcomes.
Biological Significance and Research Applicati Cholecystokinin octapeptide is a rapid-acting amino acid polypeptide hormone analogue of cholecystokinin (CCK) for intravenous use in postevacuation ons
The interest in CCK octapeptide (sulfated) stems from its potent biological activity. As a C-terminal sulfated and amidated octapeptide of cholecystokinin (CCK), it mimics the full biological action of the larger hormone.
Researchers frequently utilize this compound to explore the central and gastric effects mediated by CCK-B receptors. Some key observations in the field include:
* Gastrointestinal Effects: It is well-documented that CCK-8 exhibits various gastrointestinal effects, such as the contraction of the gallbladder and the stimulation of pancreatic secretion.
* Central Nervous System (CNS) Role: It is currently understood that the sulfated octapeptide, CCK-8S, is the predominant CCK isoform found in the CNS. This has led to investigations into how it influences satiety and cognitive processes.
* Cognitive Research: Recent s Targeting Article: CCK-SAP in Binding Studies tudies have suggested that cholecystokinin octapeptide alleviated cognitive impairment in specific experimental models, sparking interest in its potential for neuro-biochemical research.
Evaluating Quality and Sourcing
When sourcing these compounds for laboratory use, the distinction between forms is vital. While CCK octapeptide (sulfated) is the primary focus of most studies, there are other variants, such as cholecystokinin octapeptide (1-5) (desulfated), which serve different experimental needs.
It is important to note that the non-sulfated form of CCK octapeptide has been withdrawn from sale for commercial reasons by many suppliers, making the sulfated version the gold standard for those studying the full activity of the cholecystokinin sequence. When reviewing products, one might encounter varying price points—often listed as product, size, and price in €—reflecting the complexity of synthesizing this specific octapeptide.
The Role of Sulfation in Activity
The sulfate group is not merely an accessory; it is essential. The CCK peptides are derived from proCCK with a C-terminal bioactive YMGWMDFamide sequence. If the tyrosine residue is not properly sulfated, the molecule's affinity for receptors changes significantly. In my experience reviewing biochemical data, the sulfated CCK-8 is consistently preferred for studies requiring high affinity for both CCK1 and CCK2 receptor types.
Conclusion
The study of CCK octapeptide sulfated Cholecystokinin remains a cornerstone of modern peptide CCK Octapeptide, sulfated (1166) by Tocris, Part of research. By focusing on its role as a peptide hormone of the gastrointestinal system and its prevalence in the brain, researchers continue to unlock the complexities of how this octapeptide influences systemic function. Whether investigating gastric effects or the intricacies of the CNS, the precision of the sulfated CCK-8 structure provides an invaluable window into the signaling by JF Rehfeld · 2017 · Cited by 304 — CCK peptides are derived from proCCK with a C-terminal bioactive YMGWMDFamide sequence, in which the Y-residue is partly O-sulfated. The plasma forms are CCK-58 mechanisms of the body.