ASIC1 | Acid-sensing (proton-gated) ion channels (ASICs) | IUPHAR/BPS Guide to PHARMACOLOGY

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ASIC1

target has curated data in GtoImmuPdb

Target id: 684

Nomenclature: ASIC1

Family: Acid-sensing (proton-gated) ion channels (ASICs)

Annotation status:  image of a grey circle Awaiting annotation/under development. Please contact us if you can help with annotation.  » Email us

Gene and Protein Information
Species TM AA Chromosomal Location Gene Symbol Gene Name Reference
Human - - 12q12 ASIC1 acid sensing ion channel subunit 1
Mouse - - 15 F3 Asic1 acid-sensing (proton-gated) ion channel 1
Rat - - 7q36 Asic1 acid sensing ion channel subunit 1
Previous and Unofficial Names
BNaC2 | ACCN2 | amiloride-sensitive cation channel 2, neuronal | acid-sensing ion channel 1 | brain sodium channel 2 | ASIC1 beta | ASICalpha | acid-sensing (proton-gated) ion channel 1 | acid sensing (proton gated) ion channel 1
Database Links
ChEMBL Target
DrugBank Target
Ensembl Gene
Entrez Gene
Human Protein Atlas
KEGG Gene
OMIM
Pharos
UniProtKB
Wikipedia
Selected 3D Structures
Image of receptor 3D structure from RCSB PDB
Description:  Structure of chicken (Gallus gallus) ASIC1a with Texas coral snake toxin (MitTx).
PDB Id:  4NTW
Resolution:  2.07Å
Species:  Chicken
References:  1
Image of receptor 3D structure from RCSB PDB
Description:  Structure of an acid sensing ion channel in a resting state with barium
PDB Id:  5WKU
Resolution:  2.95Å
Species:  Chicken
References:  13
Functional Characteristics
ASIC1a: γ =14pS
PNa/PK = 5-13, PNa/PCa =2.5
rapid activation rate (5.8-13.7 ms), rapid inactivation rate (1.2-4 s) @ pH 6.0, slow recovery (5.3-13s) @ pH 7.4
ASIC1b: γ =19 pS
PNa/PK =14.0, PNa >> PCa
rapid activation rate (9.9 ms), rapid inactivation rate (0.9-1.7 s) @ pH 6.0, slow recovery (4.4-7.7 s) @ pH 7.4
Natural/Endogenous Ligands
H+

Download all structure-activity data for this target as a CSV file

Activators
Key to terms and symbols Click column headers to sort
Ligand Sp. Action Value Parameter Concentration range (M) Voltage-dependent (mV) Reference
Extracellular H+ Hs - ~5.1 – 6.8 pEC50 - no
pEC50 ~6.2 – 6.8 (EC50 ~6.3x10-7 – 1.6x10-7 M) ASIC1a
Not voltage dependent
pEC50 ~5.1 – 6.2 (EC50 ~8x10-6 – 6.3x10-7 M) ASIC1b
Not voltage dependent
Channel Blockers
Key to terms and symbols View all chemical structures Click column headers to sort
Ligand Sp. Action Use-dependent Value Parameter Concentration range (M) Voltage-dependent (mV) Reference
Pi-hexatoxin-Hi1a Hs - no ~9.3 pIC50 - no 4
pIC50 ~9.3 ASIC1a [4]
Not voltage dependent
psalmotoxin 1 Hs - no 9.0 pIC50 - no
pIC50 9.0 (IC50 9x10-10 M) ASIC1a
Not voltage dependent
Pi-theraphotoxin-Hm3a Hs - no ~8.5 pIC50 - no 8
pIC50 ~8.5 ASIC1a [8]
Not voltage dependent
Zn2+ Hs - no ~8.2 pIC50 - no
pIC50 ~8.2 (IC50 ~7x10-9 M) ASIC1a
Not voltage dependent
mambalgin-1 Hs - no ~7.0 – 7.3 pIC50 - no 2,6
pIC50 ~7.3 ASIC1a [6]
Not voltage dependent
pIC50 ~7.0 ASIC1b [2]
Not voltage dependent
diminazene Hs - no ~6.5 pIC50 - no 9
pIC50 ~6.5 ASIC1a & ASIC1b [9]
Not voltage dependent
A-317567 Rn - no ~5.7 pIC50 - no 7
pIC50 ~5.7 (IC50 ~2x10-6 M) ASIC1a [7]
Not voltage dependent
Pb2+ Hs - no ~5.4 – 5.8 pIC50 - no
pIC50 ~5.8 (IC50 ~1.5x10-6 M) ASIC1b
Not voltage dependent
pIC50 ~5.4 (IC50 ~4x10-6 M) ASIC1a
Not voltage dependent
benzamil Hs - no 5.0 pIC50 - no
pIC50 5.0 (IC50 1x10-5 M) ASIC1a
Not voltage dependent
ethylisopropylamiloride Hs - no 5.0 pIC50 - no
pIC50 5.0 (IC50 1x10-5 M) ASIC1a
Not voltage dependent
nafamostat Hs - no ~4.9 pIC50 - no
pIC50 ~4.9 (IC50 ~1.3x10-5 M) ASIC1a
Not voltage dependent
amiloride Hs - no 4.6 – 5.0 pIC50 - no
pIC50 5.0 (IC50 1x10-5 M) ASIC1a
Not voltage dependent
pIC50 4.6 – 4.7 (IC50 2.3x10-5 – 2.1x10-5 M) ASIC1b
Not voltage dependent
ibuprofen Hs - no ~3.5 pIC50 - no
pIC50 ~3.5 (IC50 ~3.5x10-4 M) ASIC1a
Not voltage dependent
flurbiprofen Rn - no 3.5 pIC50 - no 12
pIC50 3.5 (IC50 3.5x10-4 M) ASIC1a [12]
Not voltage dependent
Ni2+ Hs - no ~3.2 pIC50 - no
pIC50 ~3.2 (IC50 ~6x10-4 M) ASIC1a
Not voltage dependent
View species-specific channel blocker tables
Other Binding Ligands
Key to terms and symbols Click column headers to sort
Ligand Sp. Action Value Parameter Reference
[125I]psalmotoxin 1 Hs - 9.7 pKd
pKd 9.7 (Kd 2.13x10-10 M) ASIC1a
Immunopharmacology Comments
Non-steroidal anti-inflammatory drugs (NSAIDs) are direct inhibitors of ASIC currents (reviewed in [3]). Inflammatory conditions and particular pro-inflammatory mediators such as arachidonic acid induce overexpression of ASIC-encoding genes and enhance ASIC currents [5,10-11]. The sustained current component mediated by ASIC3 is potentiated by hypertonic solutions in a manner that is synergistic with the effect of arachidonic acid [5].

References

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1. Baconguis I, Bohlen CJ, Goehring A, Julius D, Gouaux E. (2014) X-ray structure of acid-sensing ion channel 1-snake toxin complex reveals open state of a Na(+)-selective channel. Cell, 156 (4): 717-29. [PMID:24507937]

2. Baron A, Diochot S, Salinas M, Deval E, Noël J, Lingueglia E. (2013) Venom toxins in the exploration of molecular, physiological and pathophysiological functions of acid-sensing ion channels. Toxicon, 75: 187-204. [PMID:23624383]

3. Baron A, Lingueglia E. (2015) Pharmacology of acid-sensing ion channels - Physiological and therapeutical perspectives. Neuropharmacology, 94: 19-35. [PMID:25613302]

4. Brunner FS, Anaya-Rojas JM, Matthews B, Eizaguirre C. (2017) Experimental evidence that parasites drive eco-evolutionary feedbacks. Proc. Natl. Acad. Sci. U.S.A., 114 (14): 3678-3683. [PMID:28320947]

5. Deval E, Noël J, Lay N, Alloui A, Diochot S, Friend V, Jodar M, Lazdunski M, Lingueglia E. (2008) ASIC3, a sensor of acidic and primary inflammatory pain. EMBO J., 27 (22): 3047-55. [PMID:18923424]

6. Diochot S, Baron A, Salinas M, Douguet D, Scarzello S, Dabert-Gay AS, Debayle D, Friend V, Alloui A, Lazdunski M et al.. (2012) Black mamba venom peptides target acid-sensing ion channels to abolish pain. Nature, 490 (7421): 552-5. [PMID:23034652]

7. Dubé GR, Lehto SG, Breese NM, Baker SJ, Wang X, Matulenko MA, Honoré P, Stewart AO, Moreland RB, Brioni JD. (2005) Electrophysiological and in vivo characterization of A-317567, a novel blocker of acid sensing ion channels. Pain, 117 (1-2): 88-96. [PMID:16061325]

8. Er SY, Cristofori-Armstrong B, Escoubas P, Rash LD. (2017) Discovery and molecular interaction studies of a highly stable, tarantula peptide modulator of acid-sensing ion channel 1. Neuropharmacology, 127: 185-195. [PMID:28327374]

9. Lee JYP, Saez NJ, Cristofori-Armstrong B, Anangi R, King GF, Smith MT, Rash LD. (2018) Inhibition of acid-sensing ion channels by diminazene and APETx2 evoke partial and highly variable antihyperalgesia in a rat model of inflammatory pain. Br. J. Pharmacol., 175 (12): 2204-2218. [PMID:29134638]

10. Mamet J, Baron A, Lazdunski M, Voilley N. (2002) Proinflammatory mediators, stimulators of sensory neuron excitability via the expression of acid-sensing ion channels. J. Neurosci., 22 (24): 10662-70. [PMID:12486159]

11. Smith ES, Cadiou H, McNaughton PA. (2007) Arachidonic acid potentiates acid-sensing ion channels in rat sensory neurons by a direct action. Neuroscience, 145 (2): 686-98. [PMID:17258862]

12. Voilley N, de Weille J, Mamet J, Lazdunski M. (2001) Nonsteroid anti-inflammatory drugs inhibit both the activity and the inflammation-induced expression of acid-sensing ion channels in nociceptors. J. Neurosci., 21 (20): 8026-33. [PMID:11588175]

13. Yoder N, Yoshioka C, Gouaux E. (2018) Gating mechanisms of acid-sensing ion channels. Nature, 555 (7696): 397-401. [PMID:29513651]

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