1. GPCR/G Protein
  2. Sigma Receptor

Sigma Receptor

Sigma receptor is a non-opioid receptor that binds diverse classes of psychotropic drugs. Sigma receptors are subdivided into two subtypes, sigma-1 and sigma-2. The sigma-1 receptor is a 25-kDa protein possessing one putative transmembrane domain and an endoplasmic reticulum retention signal. Sigma-1 receptors are highly expressed in deeper laminae of the cortex, olfactory bulb, nuclei of mesencephalon, hypothalamus, and Purkinje cells in the brain. Sigma-1 receptors are predominantly localized at the endoplasmic reticulum of both neurons and oligodendrocytes. From behavioral studies, sigma-1 receptors were shown to be involved in higher-ordered brain functions including memory and drug dependence. The sigma-2 receptor (σ2R) is a sigma receptor subtype which preferentially binds to siramesine and PB28. PGRMC1 was recently identified as the sigma-2 receptor. Unlike sigma-1 receptor, it has not yet been cloned. Activation of the receptor can cause apoptosis. A pharmacophore model based on benzooxazolone derivatives has been developed.

Sigma Receptor Related Products (16):

Cat. No. Product Name Effect Purity
  • HY-13980
    UNC0642 Inhibitor 99.81%
    UNC0642 is a potent and selective G9a/GLP inhibitor, inhibits G9a/GLP with an IC50 of less than 2.5 nM.
  • HY-13510
    SA4503 dihydrochloride Agonist 98.74%
    SA4503 dihydrochloride is a potent σ1 receptor agonist with an IC50 of 17.4 nM in guinea pig brain membranes.
  • HY-18100A
    PRE-084 hydrochloride Agonist 99.79%
    PRE-084 hydrochloride is a high affinity, selective (sigma)1 agonist, has an IC50 of 44 nM in the sigma receptor assay.
  • HY-13716
    Noscapine Activator
    Noscapine is an orally administrable drug used worldwide for cough suppression, primarily mediated by its σ-receptor agonist activity, and possess anticancer activity.
  • HY-16996A
    BD-1047 dihydrobromide Antagonist >98.0%
    BD-1047 dihydrobromide is a selective functional antagonist of sigma receptors, shows antipsychotic activity in animal models predictive of efficacy in schizophrenia.
  • HY-18101A
    BD1063 dhydrochloride Antagonist >98.0%
    BD1063 dhydrochloride is a potent and selective sigma 1 receptor antagonist.
  • HY-100155
    4-IBP Agonist >98.0%
    4-IBP is a selective (sigma)1 agonist with a high level of affinity for the (sigma)1 receptor (Ki = 1.7 nM) and a moderate affinity for the (sigma)2 receptor (Ki = 25.2 nM) .
  • HY-14221A
    Siramesine hydrochloride Agonist 99.60%
    Siramesine(Lu 28-179) Hcl is a selective sigma-2 receptor agonist, which has been shown to trigger cell death of cancer cells and to exhibit a potent anticancer activity in vivo.
  • HY-19469
    CYR-101 98.26%
    MIN-101 is a novel cyclic amide derivative that has high equipotent affinities for 5-HT2A and sigma-2 receptors (Ki of 7.53 nM and 8.19 nM for 5-HT2A and sigma-2, respectively).
  • HY-18099A
    S1RA hydrochloride Antagonist 99.57%
    S1RA Hcl(E-52862 Hcl) is a potent and selective sigma-1 receptor((sigma)1R, Ki=17 nM) antagonist, showed good selectivity against (sigma)2R (Ki > 1000 nM).
  • HY-B2215
    Dimemorfan phosphate Agonist 98.42%
    Dimemorfan phosphate is a sigma 1 receptor agonist, used as a potent antitussive.
  • HY-14813
    SA4503 Agonist
    SA4503(AGY-94806; Cutamesine) is a selective sigma 1 receptor((sigma)1R) agonist; high affinity for the sigma 1 receptor subtype labeled by ((addition))-[3H]pentazocine (IC50 = 17.4 (addition)/- 1.9 nM); 100-fold less affinity for the sigma 2 receptor.
  • HY-18099
    S1RA Antagonist
    S1RA(E-52862) is a potent and selective sigma-1 receptor((sigma)1R, Ki=17 nM) antagonist, showed good selectivity against (sigma)2R (Ki > 1000 nM).
  • HY-14221
    Siramesine Agonist
    Siramesine(Lu 28-179) is a selective sigma-2 receptor agonist, which has been shown to trigger cell death of cancer cells and to exhibit a potent anticancer activity in vivo.
  • HY-101864
    AVex-73 hydrochloride Agonist 99.72%
    AVex-73 hydrochloride is a Sigma-1 Receptor agonist with an IC50 of 860 nM.
  • HY-101626
    Sigma-LIGAND-1
    Sigma-LIGAND-1 is a selective sigma receptor ligand, has receptor IC50s of 16 nM at the DTG site, 19 nM at the PPP site, and a Ki of 4000 nM at the dopamine D2 receptor.