Pigment dispersing factor-1 receptor (PDFR-1)

The Pigment dispersing factor-1 receptor (PDFR-1) is a Class B G protein-coupled receptor (GPCR) that serves as the primary mediator for the neuropeptide Pigment Dispersing Factor (PDF) in invertebrates. It is a critical component of the circadian clock output pathway, where it synchronizes the activity of pacemaker neurons to regulate daily rhythms in locomotion, sleep, and arousal. In model organisms such as Drosophila melanogaster and Caenorhabditis elegans, PDFR-1 signaling is essential for maintaining robust behavioral cycles and transitions between states like roaming and dwelling. Beyond its role in circadian biology, PDFR-1 is involved in complex behaviors such as mate searching and metabolic sensing. Due to its vital role in the physiology of parasitic nematodes and its distinct evolutionary profile compared to human receptors, PDFR-1 is a significant target for the development of novel anthelmintic drugs. While it lacks a direct human ortholog, its functional and structural characteristics are analogous to the mammalian Vasoactive Intestinal Peptide (VIP) and Glucagon-like peptide-1 (GLP-1) receptor systems.

Other names

Pigment dispersing factor receptorPDF receptorPDF-RHanHan-soloGroom-of-pdfCG13758PDFR1

Activation of the receptor by its endogenous ligand, Pigment Dispersing Factor (PDF), leads to the stimulation of adenylyl cyclase via Gs proteins, resulting in increased intracellular cAMP levels and subsequent modulation of neuronal excitability and behavioral states.