Date published: 2025-12-24

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OR2A4 Inhibitors

Chemical inhibitors of OR2A4 operate through various mechanisms to impede the function of this olfactory receptor. α-Ionone and β-Ionone perform their inhibitory actions by binding to the same site as the natural odorant ligands of OR2A4, which prevents the activation of the receptor and subsequent cellular responses. Similarly, chemicals like Methyl eugenol, Cinnamaldehyde, Eugenol, Citronellal, Geraniol, Limonene, Isoeugenol, and Benzaldehyde act by occupying the ligand-binding site of OR2A4. This occupation blocks the natural ligands from interacting with the receptor, thereby inhibiting the usual conformational changes required for OR2A4 activation. These inhibitors ensure that the receptor remains in an inactive state by obstructing the access of activating molecules. Further complicating the activity of OR2A4, Thymol and Carvone employ slightly different tactics. Thymol targets an allosteric site of OR2A4, which induces a conformational change in the protein, thus reducing its ability to bind to natural activating ligands. This allosteric inhibition is crucial as it demonstrates that OR2A4 activity can be modulated by binding events at sites other than the primary ligand-binding domain. Carvone, on the other hand, competitively binds to the active site of OR2A4. This means that Carvone and the natural ligands of OR2A4 vie for the same site, and when Carvone is bound, the receptor cannot be activated by its natural ligands. Through these diverse yet specific interactions, each chemical ensures the functional inhibition of OR2A4 by preventing its normal response to odorant molecules.
Product NameCAS #Catalog #QUANTITYPriceCitationsRATING

α-Ionone

127-41-3sc-239157
100 g
$75.00
(0)

α-Ionone inhibits OR2A4 by binding to the same site as its natural odorant ligands, thereby preventing activation of the receptor and subsequent signal transduction.

4-Allyl-1,2-dimethoxybenzene

93-15-2sc-232373
sc-232373A
sc-232373B
5 g
25 g
100 g
$24.00
$41.00
$123.00
(0)

4-Allyl-1,2-dimethoxybenzene can inhibit OR2A4 by binding to the ligand-binding site, preventing the protein from undergoing the necessary conformational changes for activation.

Cinnamic Aldehyde

104-55-2sc-294033
sc-294033A
100 g
500 g
$102.00
$224.00
(0)

Cinnamaldehyde can bind to the active site of OR2A4, which blocks the natural ligands from binding and thus inhibits the receptor's function.

Thymol

89-83-8sc-215984
sc-215984A
100 g
500 g
$97.00
$193.00
3
(0)

Thymol can act on OR2A4 by binding to an allosteric site, which induces a conformational change in the protein, reducing its ability to bind to its natural activating ligands and inhibiting its function.

(+)-Carvone

2244-16-8sc-239480
sc-239480A
5 ml
25 ml
$32.00
$82.00
2
(1)

Carvone inhibits OR2A4 by competitively binding to its active site, which obstructs the natural ligands' access and prevents the receptor's activation.

Eugenol

97-53-0sc-203043
sc-203043A
sc-203043B
1 g
100 g
500 g
$31.00
$61.00
$214.00
2
(1)

Eugenol interacts with OR2A4 by binding directly to its active site, which competitively inhibits the binding of natural odorants, thus inhibiting the receptor's activity.

(±)-Citronellal

106-23-0sc-234400
100 ml
$51.00
(0)

Citronellal can inhibit OR2A4 by occupying its ligand-binding site, which prevents the normal activatory conformational changes within the protein structure.

Geraniol

106-24-1sc-235242
sc-235242A
25 g
100 g
$44.00
$117.00
(0)

Geraniol can bind to the active site of OR2A4, thereby inhibiting the receptor's normal function by blocking the binding of natural activating ligands.

D-Limonene

5989-27-5sc-205283
sc-205283A
100 ml
500 ml
$82.00
$126.00
3
(1)

Limonene can inhibit OR2A4 by binding to the ligand-binding domain, inducing a conformational change which results in an inactive receptor state that cannot be activated by natural ligands.

Isoeugenol

97-54-1sc-250186
sc-250186A
5 g
100 g
$62.00
$52.00
(0)

Isoeugenol can bind to the active site of OR2A4, preventing the binding of its natural ligands and therefore inhibiting the protein's activity.