Proton-gated sodium channel impairing toxin

Channel Acid-sensing ion channels (ASICs) are voltage-insensitive, proton-gated cation channels activated by extracellular acidosis. In mammals, 4 genes encode at least 6 different subunits, the variants ASIC1a and ASIC1b, the variants ASIC2a and ASIC2b, and ASIC3 and ASIC4. Three identical or different subunits are required to form a functional channel (except for ASIC2b and ASIC4, which do not form proton-gated channels when expressed alone). Acid-sensing ion channel 1a (ASIC1a) and ASIC2 (both variants a and b) are widely expressed in neurons of the central nervous system, whereas almost all subunits (except ASIC4) are present in sensory neurons of the peripheral nervous system including nociceptors.
Toxin
Channel Toxins from different taxa that target channels.
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Human Snake Scorpion Cone
snail
Spider Cnidarian Insect Other All
Subunit contained in homo- or heterotrimer:
ASIC1a image image - image image image - - image
ASIC1b image image - image image image - - image
ASIC2a image image - image image - - - image
ASIC2b image image - image image image - - image
ASIC3 image image - image - image - - image
ASIC4 image - - image - - - - -
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Venom protein entries in UniProtKB/Swiss-Prot

22 entries grouped by family (browse by taxonomy, browse by keywords)

2 entries

FARP (FMRFamide related peptide) family

Select_allDeselect_all
CRF1_CONCF Conorfamide-As1 (Conorfamide-As1a) (CNF-As1a) ... Conus cancellatus (Cancellate cone) (Conus ...
CRF2_CONCF Conorfamide-As2 (Conorfamide-As2a) (CNF-As2a) ... Conus cancellatus (Cancellate cone) (Conus ...

2 entries

Not in a family

Select_allDeselect_all
ACTX1_ANTCS Acatoxin 1 (Acatx1) Anthopleura cascaia (Sea anemone)
TXPM1_PHYCF Pi-phymatoxin-Pcf1a (Pi-PMTX-Pcf1a) ... Phymanthus crucifer (Red beaded anemone)

1 entry

NPY family

COS_CONTE Conorfamide Tx1.3 (AIVGRPRFamide) (AIVGRPRFa) ... Conus textile (Cloth-of-gold cone)

1 entry

Phospholipase A2 family, Group I subfamily, K49 sub-subfamily

"Phospholipase A2 family" VenomZone page
PA2HB_MICTN Basic phospholipase A2 homolog MitTx-beta ... Micrurus tener tener (Texas coral snake)

2 entries

Psalmotoxin-1 family

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TX3A_HETMC Pi-theraphotoxin-Hm3a (Pi-TRTX-Hm3a) Heteroscodra maculata (Togo starburst tarantula) ...
TXP1_PSACA Psalmotoxin-1 (PcTx1) (Pi-theraphotoxin-Pc1a) ... Psalmopoeus cambridgei (Trinidad chevron ...

4 entries

Psalmotoxin-1 family, Double-knot toxin subfamily

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TP1A_HADIN Pi-hexatoxin-Hi1a (Pi-HXTX-Hi1a) (Double-knot ... Hadronyche infensa (Fraser island funnel-web ...
TP1B_HADIN Pi-hexatoxin-Hi1b (Pi-HXTX-Hi1b) (Double-knot ... Hadronyche infensa (Fraser island funnel-web ...
TP1C_HADIN Pi-hexatoxin-Hi1c (Pi-HXTX-Hi1c) (Double-knot ... Hadronyche infensa (Fraser island funnel-web ...
TP1D_HADIN Pi-hexatoxin-Hi1d (Pi-HXTX-Hi1d) (Double-knot ... Hadronyche infensa (Fraser island funnel-web ...

1 entry

Sea anemone structural class 9a family

TX9A_URTGR Precursor protein UG [Cleaved into: ... Urticina grebelnyi (Painted anemone)

5 entries

Sea anemone type 3 (BDS) potassium channel toxin family

Select_allDeselect_all
BDS2_ANTEL Pi-actitoxin-Ael2b (Pi-AITX-Ael2b) (Toxin ... Anthopleura elegantissima (Green aggregating ...
BDS5A_HETCR Pi-stichotoxin-Hcr5a (Pi-SHTX-Hcr5a) (APETx-like ... Heteractis crispa (Leathery sea anemone) ...
BDS5B_HETCR Pi-stichotoxin-Hcr5b (Pi-SHTX-Hcr5b) (APETx-like ... Heteractis crispa (Leathery sea anemone) ...
BDS5C_HETCR Pi-stichotoxin-Hcr5c (Pi-SHTX-Hcr5c) (APETx-like ... Heteractis crispa (Leathery sea anemone) ...
BDS5D_HETCR Pi-stichotoxin-Hcr5d (Pi-SHTX-Hcr5d) (APETx-like ... Heteractis crispa (Leathery sea anemone) ...

3 entries

Snake three-finger toxin family, Short-chain subfamily, Mambalgin sub-subfamily

Select_allDeselect_all "Snake three-finger toxin family" VenomZone page
3SX1_DENPO Mambalgin-1 (Mamb-1) (Pi-Dp1) Dendroaspis polylepis polylepis (Black mamba)
3SX2_DENPO Mambalgin-2 (Ma-2) (Mamb-2) (Pi-Dp2) Dendroaspis polylepis polylepis (Black mamba)
3SX3_DENAN Mambalgin-3 (Mamb-3) Dendroaspis angusticeps (Eastern green mamba) ...

1 entry

Venom Kunitz-type family

"Venom Kunitz-type family" VenomZone page
VKTA_MICTN Kunitz-type neurotoxin MitTx-alpha Micrurus tener tener (Texas coral snake)