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UniProtKB - P58783 (CA4B_CONER)
Protein
Alpha-conotoxin EIVB
Gene
N/A
Organism
Conus ermineus (Agate cone) (Chelyconus ermineus)
Status
Functioni
Alpha-conotoxins act on postsynaptic membranes, they bind to the nicotinic acetylcholine receptors (nAChR) and thus inhibit them. This toxin binds with high affinity to both fetal (alpha-1/beta-1/epsilon/delta subunits) and adult (alpha-1/beta-1/gamma/delta subunits) mammalian muscle nicotinic acetylcholine receptors (nAChR).
GO - Molecular functioni
- acetylcholine receptor inhibitor activity Source: UniProtKB-KW
- ion channel regulator activity Source: UniProtKB-KW
- toxin activity Source: UniProtKB-KW
Keywordsi
Molecular function | Acetylcholine receptor inhibiting toxin, Ion channel impairing toxin, Neurotoxin, Postsynaptic neurotoxin, Toxin |
Names & Taxonomyi
Protein namesi | Recommended name: Alpha-conotoxin EIVB |
Organismi | Conus ermineus (Agate cone) (Chelyconus ermineus) |
Taxonomic identifieri | 55423 [NCBI] |
Taxonomic lineagei | Eukaryota › Metazoa › Spiralia › Lophotrochozoa › Mollusca › Gastropoda › Caenogastropoda › Neogastropoda › Conoidea › Conidae › Conus › Chelyconus |
Organism-specific databases
ConoServeri | 1740, EIVB |
Subcellular locationi
Extracellular region or secreted
Extracellular region or secreted
- extracellular region Source: UniProtKB-SubCell
Other locations
- host cell postsynaptic membrane Source: UniProtKB-KW
Keywords - Cellular componenti
SecretedPTM / Processingi
Molecule processing
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
PeptideiPRO_0000044465 | 1 – 30 | Alpha-conotoxin EIVBAdd BLAST | 30 |
Amino acid modifications
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Modified residuei | 7 | 4-hydroxyproline1 Publication | 1 | |
Modified residuei | 13 | 4-hydroxyproline1 Publication | 1 | |
Modified residuei | 21 | 4-hydroxyproline1 Publication | 1 | |
Modified residuei | 22 | 4-hydroxyproline1 Publication | 1 | |
Modified residuei | 27 | 4-hydroxyproline1 Publication | 1 | |
Modified residuei | 30 | Glycine amide1 Publication | 1 |
Post-translational modificationi
Contains 3 disulfide bonds (By similarity). They are not added, since framework IV presents two different connectivities (I-V, II-III, IV-VI and I-III, II-V, IV-VI).By similarity
Keywords - PTMi
Amidation, Disulfide bond, HydroxylationExpressioni
Tissue specificityi
Expressed by the venom duct.
Family & Domainsi
Domaini
The cysteine framework is IV (CC-C-C-C-C).
Sequence similaritiesi
Belongs to the conotoxin A superfamily.Curated
Family and domain databases
InterProi | View protein in InterPro IPR012498, Toxin_14 |
Pfami | View protein in Pfam PF07829, Toxin_14, 1 hit |
i Sequence
Sequence statusi: Complete.
Mass spectrometryi
Molecular mass is 3099.1 Da. Determined by ESI. 1 Publication
Similar proteinsi
Cross-referencesi
3D structure databases
AlphaFoldDBi | P58783 |
SMRi | P58783 |
ModBasei | Search... |
Organism-specific databases
ConoServeri | 1740, EIVB |
Family and domain databases
InterProi | View protein in InterPro IPR012498, Toxin_14 |
Pfami | View protein in Pfam PF07829, Toxin_14, 1 hit |
MobiDBi | Search... |
Entry informationi
Entry namei | CA4B_CONER | |
Accessioni | P58783Primary (citable) accession number: P58783 | |
Entry historyi | Integrated into UniProtKB/Swiss-Prot: | April 16, 2002 |
Last sequence update: | April 16, 2002 | |
Last modified: | May 25, 2022 | |
This is version 74 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