cryo-peptide-gel-mask Crustacean cardioactive peptide (CCAP) is a fascinating neuropeptide that plays a crucial role in the physiological regulation of crustaceans and insects. Known for its potent cardioaccelerator properties, CCAP exerts excitatory effects on the heart and muscles, influencing vital functions such as heart rate, intestinal peristalsis, molting, and osmotic pressure. This cyclic nonapeptide, first isolated from the pericardial organs of the shore crab, acts as both a neurotransmitter and a neurohormone, underscoring its widespread influence within invertebrate nervous systems.
CCAP is a cyclic amidated nonapeptide, meaning it is composed of nine amino acids linked in a ring structure, with the C-terminus modified into an amide. This specific structure, particularly the disulfide bond formed between cysteine residues at positions 3 and 9, confers unique stability and biological activityOccurence of the Crustacean Cardioactive Peptide (CCAP) in .... The peptide sequence, H-Pro-Phe-Cys-Asn-Ala-Phe-Thr-Gly-Cys-NH2, is highly conserved across various invertebrate species, highlighting its fundamental importance.
The primary and most well-documented function of CCAP is its influence on cardiac activity.CCAP It acts on the heart to increase both the frequency and amplitude of heartbeats in crustaceans and insects. Beyond its cardiac effects, research indicates that CCAP also modulates intestinal motility, contributes to the regulation of molting processes, and plays a role in maintaining osmotic pressure. Its presence in gut endocrine cells suggests additional functions related to digestion and nutrition.Crustacean cardioactive peptide (CCAP) | 昆虫心脏调节肽
While initially identified in crustaceans, CCAP's functional significance extends to insects. In the tobacco hawkmoth, *Manduca sexta*, CCAP has been extensively studied, revealing its role in regulating various physiological processes. Studies have also explored its signaling pathways, with recent research linking the CCAP signaling system in gastropod mollusks to both Ca2+/PKC and cAMP/PKA signal transduction pathways.Occurence of the Crustacean Cardioactive Peptide (CCAP) in ... This suggests a complex interplay of cellular mechanisms through which CCAP exerts its effects.Solution conformations of an insect neuropeptide
The peptide's influence is not limited to somatic muscles; CCAP-enpeptide hormones are known to target wing, cuticle, cardiac, and visceral muscles.作者：Y Zhou·2021·被引用次数：3—CCAP acts on the heart to elicit increased frequency and amplitude of the heartbeatin crustaceans and insects.1, 2, 4 Its main central role is to induce the ... This broad targeting capability underscores its importance as a central regulator of invertebrate physiology. Furthermore, CCAP's role as a neurotransmitter and neurohormone implies its involvement in rapid signaling events as well as longer-term physiological adjustments.
The study of CCAP is crucial for understanding fundamental biological processes in invertebrates. Its potent effects on heart function and muscle activity make it a valuable tool for researchers in cellular and molecular biology. The availability of synthetic CCAP for research purposes allows for detailed investigations into its mechanisms of action and potential applications.
While primarily studied for its physiological roles, the unique properties of CCAP have led to its use in various research applications. It is supplied in lypholized powder form, typically for research use only, and is crucial for studies investigating cardiovascular regulation, neuromuscular transmission, and developmental processes in invertebrates. The precise quantification of its effects on isolated organ preparations, such as semi-isolated crab hearts, further illuminates its potent inotropic and chronotropic actions.
Crustacean cardioactive peptide (CCAP) stands as a vital neuropeptide with profound impacts on the physiology of crustaceans and insects. Its capacity to regulate heart rate, muscle activity, and other essential functions makes it a subject of significant scientific interest. From its structural characteristics to its diverse physiological roles, CCAP exemplifies the intricate signaling mechanisms that govern life in the invertebrate world, offering a window into the complex interplay of hormones and neurotransmitters that maintain organismal homeostasis.
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