κ Opioid Receptors

The κ opioid receptor, (also known as OP2, KOP, KOR), is a member of the opioid family of G-protein-coupled receptors that also includes μ, δ and NOP receptors. Three variants of the receptor (designated κ1, κ2, and κ3) have been characterized.

Products
Background
Literature (2)
Gene Data

κ Opioid Receptor Agonists

Cat. No. Product Name / Activity
0699 BRL 52537 hydrochloride
Potent and selective κ agonist
3195 Dynorphin A
Endogenous κ agonist
1483 GR 89696 fumarate
Subtype-selective κ agonist
7541 Helianorphin-19
Potent and selective G protein-biased κ opioid receptor (KOR) agonist
0778 ICI 199,441 hydrochloride
Potent κ agonist
0822 ICI 204,448 hydrochloride
κ agonist, acts peripherally
0471 (+)-U-50488 hydrochloride
Selective κ agonist; less active enantiomer of (±)-U-50488 (Cat. No. 0495)
0495 (±)-U-50488 hydrochloride
Selective κ agonist
0496 (-)-U-50488 hydrochloride
Selective κ agonist; more active enantiomer of (±)-U-50488 (Cat. No. 0495)

κ Opioid Receptor Antagonists

Cat. No. Product Name / Activity
0794 DIPPA hydrochloride
Selective and irreversible κ antagonist
4866 ML 190
Selective κ opioid receptor antagonist

Other

Cat. No. Product Name / Activity
5611 Salvinorin B
Activates the κ-opioid DREADD (KORD)

The κ opioid receptor, (also known as OP2, KOP, KOR), is a member of the opioid family of G-protein-coupled receptors that also includes μ, δ and NOP receptors. Three variants of the receptor (designated κ1, κ2, and κ3) have been characterized. However only one cDNA clone has been identified, hence these receptor subtypes are likely to arise from interaction of one κ-opioid receptor protein with other membrane associated proteins.

κ Opioid receptors are located predominantly in the cerebral cortex, nucleus accumbens, claustrum and hypothalamus and have been implicated in the regulation of nociception, diuresis, feeding and neuroendocrine secretions. Dynorphins A and B and α-neoendorphin appear to be the endogenous ligands. The human gene encoding the κ opioid receptor has been localized to chromosome 8 (8q11.2).

External sources of pharmacological information for κ Opioid Receptors :

Literature for κ Opioid Receptors

Tocris offers the following scientific literature for κ Opioid Receptors to showcase our products. We invite you to request* your copy today!

*Please note that Tocris will only send literature to established scientific business / institute addresses.


Peptides Involved in Appetite Modulation Scientific Review

Peptides Involved in Appetite Modulation Scientific Review

Written by Sonia Tucci, Lynsay Kobelis and Tim Kirkham, this review provides a synopsis of the increasing number of peptides that have been implicated in appetite regulation and energy homeostasis; putative roles of the major peptides are outlined and compounds available from Tocris are listed.

Addiction Poster

Addiction Poster

The key feature of drug addiction is the inability to stop using a drug despite clear evidence of harm. This poster describes the brain circuits associated with addiction, and provides an overview of the main classes of addictive drugs and the neurotransmitter systems that they target.

κ Opioid Receptor Gene Data

Species Gene Symbol Gene Accession No. Protein Accession No.
Human OPRK1 NM_000912 P41145
Mouse Oprk1 NM_011011 P33534
Rat Oprk1 NM_017167 P34975