Cat. No. 1552

UFP-101 N-(Bn)Gly-Gly-Gly-Phe-Thr-Gly-Ala-Arg-Lys-Ser-Ala-Arg-Lys-Arg-Lys-Asn-Gln-NH2

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Alternative Name: [Nphe1,Arg14,Lys15]Nociceptin-NH2

Biological Activity

Potent, selective and competitive silent antagonist for the NOP opioid receptor. Binds to NOP with high affinity (pKi = 10.24) and displays > 3000-fold selectivity over δ, μ and κ opioid receptors. Antinociceptive and opposes the action of nociceptin in vivo.

Technical Data


(Modifications: Gly-1 = N-(Bn)Gly, Gln-17 = C-terminal amide)

Soluble to 1 mg/ml in water
Desiccate at -20°C

The technical data provided above is for guidance only. For batch specific data refer to the Certificate of Analysis.
All Tocris products are intended for laboratory research use only.

Certificate of Analysis / Product Datasheet / Safety Datasheet

Certificate of Analysis / Product Datasheet
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References are publications that support the products' biological activity.

Gavioli et al (2003) Blockade of nociceptin/orphanin FQ-NOP receptor signalling produces antidepressant-like effects: pharmacological and genetic evidences from the mouse forced swimming test. Eur.J.Neurosci. 17 1987. PMID: 12752799.

Marti et al (2003) Pharmacological profiles of presynaptic nociceptin/orphanin FQ receptors modulating 5-hydroxytryptamine and noradrenaline release in the rat neocortex. Br.J.Pharmacol. 138 91. PMID: 12522077.

McDonald et al (2003) UFP-101, a high affinity antagonist for the nociceptin/orphanin FQ receptor: radioligand and GTPγ35 binding studies. Naunyn Schmiedebergs Arch.Pharmacol. 367 183. PMID: 12595960.

Calo et al (2002) [Nphe1,Arg14,Lys15]Nociceptin-NH2, a novel potent and selective antagonist of the nociceptin/orphanin FQ receptor. Br.J.Pharmacol. 136 303. PMID: 12010780.

If you know of a relevant reference for UFP-101 please let us know.

Citations are publications that use Tocris products. Selected citations for UFP-101 include:

Mahmoud et al (2010) Modulation of silent and constitutively active nociceptin/orphanin FQ receptors by potent receptor antagonists and Na+ ions in rat sympathetic neurons. Mol Pharmacol 77 804. PMID: 20159949.

Kuzmin et al (2004) Evidence in locomotion test for the functional heterogeneity of ORL-1 receptors. Br J Pharmacol 141 132. PMID: 14662736.

Do you know of a great paper that uses UFP-101 from Tocris? If so please let us know.

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Keywords: UFP-101, supplier, Potent, selective, silent, antagonists, NOP, Nociceptin, Receptors, ORL1, OP4, Opioid, Tocris Bioscience, NOP Receptor Antagonist products

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