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| Names | |
|---|---|
| Preferred IUPAC name
(2R)-2-Amino-5-phosphonopentanoic acid | |
| Identifiers | |
3D model (JSmol) |
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| ChemSpider |
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| ECHA InfoCard | 100.150.904 
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PubChem CID |
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| UNII | |
CompTox Dashboard (EPA) |
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| Properties | |
| C5H12NO5P | |
| Molar mass | 197.13 g/mol |
| Appearance | white solid |
| Density | 1.529 g/mL |
| Boiling point | 482.1 °C (899.8 °F; 755.2 K) |
| Ammonium hydroxide, 50 mg/mL | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
AP5 (also known as APV, (2R)-amino-5-phosphonovaleric acid, or (2R)-amino-5-phosphonopentanoate) is a chemical compound used as a biochemical tool to study various cellular processes. It is a selective NMDA receptor antagonist that competitively inhibits the ligand (glutamate) binding site of NMDA receptors.[1] AP5 blocks NMDA receptors in micromolar concentrations (~50 μM).
AP5 blocks the cellular analog of classical conditioning in the sea slug Aplysia californica, and has similar effects on Aplysia long-term potentiation (LTP), since NMDA receptors are required for both.[2] It is sometimes used in conjunction with the calcium chelator BAPTA to determine whether NMDARs are required for a particular cellular process. AP5/APV has also been used to study NMDAR-dependent LTP in the mammalian hippocampus.[3]
In general, AP5 is very fast-acting within in vitro preparations, and can block NMDA receptor action at a reasonably small concentration. The active isomer of AP5 is considered to be the D configuration, although many preparations are available as a racemic mixture of D- and L-isomers. It is useful to isolate the action of other glutamate receptors in the brain, i.e., AMPA and kainate receptors.
AP5 can block the conversion of a silent synapse to an active one, since this conversion is NMDA receptor-dependent.
