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UniProtKB - P01481 (SCX5_LEIQU)
Protein
Alpha-mammal toxin Lqq5
Gene
N/A
Organism
Leiurus quinquestriatus quinquestriatus (Egyptian scorpion) (Deathstalker scorpion)
Status
Functioni
Alpha toxins bind voltage-independently at site-3 of sodium channels (Nav) and inhibit the inactivation of the activated channels, thereby blocking neuronal transmission. Is active on mammals and bind with high affinity to rat brain synaptosome. Does not display phospholipid-binding activity.
2 PublicationsGO - Molecular functioni
- sodium channel inhibitor activity Source: InterPro
- toxin activity Source: UniProtKB-KW
GO - Biological processi
- defense response Source: InterPro
- modulation by symbiont of host nervous system process Source: InterPro
Keywordsi
Molecular function | Ion channel impairing toxin, Neurotoxin, Toxin, Voltage-gated sodium channel impairing toxin |
Names & Taxonomyi
Protein namesi | Recommended name: Alpha-mammal toxin Lqq5Alternative name(s): Lqq V Neurotoxin V |
Organismi | Leiurus quinquestriatus quinquestriatus (Egyptian scorpion) (Deathstalker scorpion) |
Taxonomic identifieri | 6885 [NCBI] |
Taxonomic lineagei | Eukaryota › Metazoa › Ecdysozoa › Arthropoda › Chelicerata › Arachnida › Scorpiones › Buthida › Buthoidea › Buthidae › Leiurus › |
Subcellular locationi
Extracellular region or secreted
Extracellular region or secreted
- extracellular region Source: UniProtKB-SubCell
Keywords - Cellular componenti
SecretedPathology & Biotechi
Toxic dosei
LD50 is 125 ng/kg (2.5 ng/mouse) by intracerebroventricular injection into mice, 3.4 pmol/g by subcutaneous injection in mouse and 2317 pmol/g in Blattella germanica.1 Publication
PTM / Processingi
Molecule processing
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
ChainiPRO_0000066782 | 1 – 64 | Alpha-mammal toxin Lqq5Add BLAST | 64 |
Amino acid modifications
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Disulfide bondi | 12 ↔ 63 | PROSITE-ProRule annotation | ||
Disulfide bondi | 16 ↔ 36 | PROSITE-ProRule annotation | ||
Disulfide bondi | 22 ↔ 46 | PROSITE-ProRule annotation | ||
Disulfide bondi | 26 ↔ 48 | PROSITE-ProRule annotation | ||
Modified residuei | 64 | Asparagine amide1 Publication | 1 |
Keywords - PTMi
Amidation, Disulfide bondExpressioni
Tissue specificityi
Expressed by the venom gland.
Family & Domainsi
Domains and Repeats
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Domaini | 2 – 64 | LCN-type CS-alpha/betaPROSITE-ProRule annotationAdd BLAST | 63 |
Domaini
Has the structural arrangement of an alpha-helix connected to antiparallel beta-sheets by disulfide bonds (CS-alpha/beta).Curated
Sequence similaritiesi
Belongs to the long (4 C-C) scorpion toxin superfamily. Sodium channel inhibitor family. Alpha subfamily.Curated
Family and domain databases
CDDi | cd00107, Knot1, 1 hit |
Gene3Di | 3.30.30.10, 1 hit |
InterProi | View protein in InterPro IPR044062, LCN-type_CS_alpha_beta_dom IPR003614, Scorpion_toxin-like IPR036574, Scorpion_toxin-like_sf IPR018218, Scorpion_toxinL IPR002061, Scorpion_toxinL/defensin |
Pfami | View protein in Pfam PF00537, Toxin_3, 1 hit |
PRINTSi | PR00285, SCORPNTOXIN |
SMARTi | View protein in SMART SM00505, Knot1, 1 hit |
SUPFAMi | SSF57095, SSF57095, 1 hit |
PROSITEi | View protein in PROSITE PS51863, LCN_CSAB, 1 hit |
i Sequence
Sequence statusi: Complete.
P01481-1 [UniParc]FASTAAdd to basket
10 20 30 40 50
LKDGYIVDDK NCTFFCGRNA YCNDECKKKG GESGYCQWAS PYGNACWCYK
60
LPDRVSIKEK GRCN
Sequence databases
PIRi | A01741, NTSR5L |
Similar proteinsi
Cross-referencesi
Sequence databases
PIRi | A01741, NTSR5L |
3D structure databases
AlphaFoldDBi | P01481 |
SMRi | P01481 |
ModBasei | Search... |
Family and domain databases
CDDi | cd00107, Knot1, 1 hit |
Gene3Di | 3.30.30.10, 1 hit |
InterProi | View protein in InterPro IPR044062, LCN-type_CS_alpha_beta_dom IPR003614, Scorpion_toxin-like IPR036574, Scorpion_toxin-like_sf IPR018218, Scorpion_toxinL IPR002061, Scorpion_toxinL/defensin |
Pfami | View protein in Pfam PF00537, Toxin_3, 1 hit |
PRINTSi | PR00285, SCORPNTOXIN |
SMARTi | View protein in SMART SM00505, Knot1, 1 hit |
SUPFAMi | SSF57095, SSF57095, 1 hit |
PROSITEi | View protein in PROSITE PS51863, LCN_CSAB, 1 hit |
MobiDBi | Search... |
Entry informationi
Entry namei | SCX5_LEIQU | |
Accessioni | P01481Primary (citable) accession number: P01481 | |
Entry historyi | Integrated into UniProtKB/Swiss-Prot: | July 21, 1986 |
Last sequence update: | July 21, 1986 | |
Last modified: | May 25, 2022 | |
This is version 96 of the entry and version 1 of the sequence. See complete history. | ||
Entry statusi | Reviewed (UniProtKB/Swiss-Prot) | |
Annotation program | Animal Toxin Annotation Program |
Miscellaneousi
Keywords - Technical termi
Direct protein sequencingDocuments
- SIMILARITY comments
Index of protein domains and families