Abstract
Relaxin-3 is a neuropeptide that has roles in stress, memory and appetite regulation. The peptide acts on its cognate receptor RXFP3 to induce coupling to inhibitory G proteins to inhibit adenylyl cyclase and activate MAP-kinases such as ERK1/2, p38MAPK and JNK. Other relaxin family peptides can activate the receptor to produce alternative patterns of signalling and there is an allosteric modulator 135PAM1 that displays probe-selectivity. There are now a variety of selective peptide agonists and antagonists that will assist in the determination of the physiological roles of the relaxin-RXFP3 system and its potential as a drug target.
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Notes
Probe selectivity—the allosteric modulation by 135PAM1 only occurs with amidated relaxin analogues and not with the native peptides.
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RJS is supported by National Health and Medical Research Council of Australia Program Grant 1055134.
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Special Issue: In Honor of Philip Beart.
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Kocan, M., Ang, S.Y. & Summers, R.J. Orthosteric, Allosteric and Biased Signalling at the Relaxin-3 Receptor RXFP3. Neurochem Res 41, 610–619 (2016). https://doi.org/10.1007/s11064-015-1701-3
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DOI: https://doi.org/10.1007/s11064-015-1701-3