FMRFamide
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Other names
FMRF amide; H-Phe-Met-Arg-Phe-NH2; L-Phenylalanyl-L-methionyl-L-arginyl-L-phenylalaninamide
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Identifiers | |
3D model (
JSmol ) |
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PubChem CID
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UNII | |
CompTox Dashboard (EPA)
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Properties | |
C29H42N8O4S | |
Molar mass | 598.77 g·mol−1 |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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FMRFamide (H-Phe-Met-Arg-Phe-NH2) is a neuropeptide from a broad family of FMRFamide-related peptides (FaRPs) all sharing an -RFamide sequence at their C-terminus. First identified in Hard clam (Mercenaria mercenaria),[1] it is thought to play an important role in cardiac activity regulation.[2] Several FMRFamide related peptides are known, regulating various cellular functions and possessing pharmacological actions, such as anti-opiate effects.[3] In Mercenaria mercenaria, FMRFamide has been isolated and demonstrated to increase both the force and frequency of the heartbeat through a biochemical pathway that is thought to involve the increase of cytoplasmic cAMP in the ventricular region.[4]
FMRFamide is an important neuropeptide in several phyla such as
In invertebrates, the FMRFamide-related peptides are known to affect
Detection of this neuropeptide is important because its expression lays down the foundation of the CNS in the early stages of development in invertebrates. In recent years, neuromodulatory actions of FMRFamide in invertebrates have become more apparent. This is, in part, due to the extensive studies done on the Planorbid and Lymnaeid families of pond snails.[8]