UniProtKB - P84034 (TX35B_PHONI)
Protein
Delta-ctenitoxin-Pn1b
Gene
N/A
Organism
Phoneutria nigriventer (Brazilian armed spider) (Ctenus nigriventer)
Status
Functioni
Insecticidal neurotoxin that reversibly inhibits the N-methyl-D-aspartate (NMDA)-subtype of ionotropic glutamate receptor (GRIN) and inhibits inactivation of insect sodium channels (Nav) (By similarity). Inhibits glutamate uptake in rat brain synaptosomes (PubMed:14757211). In vivo, induces immediate excitatory effects when injected intrathoracically in houseflies and cockroaches (PubMed:14757211).By similarity1 Publication
Miscellaneous
Has no effect when intracerebroventricularly injected into mice.1 Publication
GO - Molecular functioni
- toxin activity Source: UniProtKB-KW
Keywordsi
Molecular function | Ion channel impairing toxin, Ionotropic glutamate receptor inhibitor, Neurotoxin, Postsynaptic neurotoxin, Toxin, Voltage-gated sodium channel impairing toxin |
Names & Taxonomyi
Protein namesi | Recommended name: Delta-ctenitoxin-Pn1bCuratedShort name: Delta-CNTX-Pn1bCurated Alternative name(s): Neurotoxin PnTx4-31 Publication |
Organismi | Phoneutria nigriventer (Brazilian armed spider) (Ctenus nigriventer) |
Taxonomic identifieri | 6918 [NCBI] |
Taxonomic lineagei | Eukaryota › Metazoa › Ecdysozoa › Arthropoda › Chelicerata › Arachnida › Araneae › Araneomorphae › Entelegynae › Lycosoidea › Ctenidae › Phoneutria |
Organism-specific databases
ArachnoServeri | AS000278, delta-ctenitoxin-Pn1b |
Subcellular locationi
Extracellular region or secreted
- Secreted 2 Publications
Extracellular region or secreted
- extracellular region Source: UniProtKB-SubCell
Other locations
- host cell postsynaptic membrane Source: UniProtKB-KW
Keywords - Cellular componenti
SecretedPathology & Biotechi
Toxic dosei
LD50 is 20 ng/house fly.1 Publication
PTM / Processingi
Molecule processing
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
ChainiPRO_0000087629 | 1 – 48 | Delta-ctenitoxin-Pn1b2 PublicationsAdd BLAST | 48 |
Amino acid modifications
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Disulfide bondi | 1 ↔ 15 | Curated | ||
Disulfide bondi | 8 ↔ 21 | Curated | ||
Disulfide bondi | 12 ↔ 48 | Curated | ||
Disulfide bondi | 14 ↔ 31 | Curated | ||
Disulfide bondi | 23 ↔ 29 | Curated |
Keywords - PTMi
Disulfide bondExpressioni
Tissue specificityi
Expressed by the venom gland.2 Publications
Family & Domainsi
Domaini
The presence of a 'disulfide through disulfide knot' structurally defines this protein as a knottin.Curated
Sequence similaritiesi
Keywords - Domaini
Knottini Sequence
Sequence statusi: Complete.
P84034-1 [UniParc]FASTAAdd to basket
10 20 30 40
CGDINAACKE DCDCCGYTTA CDCYWSSSCK CREAAIVIYT APKKKLTC
Mass spectrometryi
Molecular mass is 5199.49±0.64 Da. Determined by ESI. 2 Publications
Molecular mass is 5199.5 Da. 2 Publications
Similar proteinsi
Cross-referencesi
3D structure databases
SMRi | P84034 |
ModBasei | Search... |
Organism-specific databases
ArachnoServeri | AS000278, delta-ctenitoxin-Pn1b |
Family and domain databases
ProtoNeti | Search... |
MobiDBi | Search... |
Entry informationi
Entry namei | TX35B_PHONI | |
Accessioni | P84034Primary (citable) accession number: P84034 | |
Entry historyi | Integrated into UniProtKB/Swiss-Prot: | July 19, 2004 |
Last sequence update: | July 19, 2004 | |
Last modified: | April 7, 2021 | |
This is version 37 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