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Protein

Omega-conotoxin CVIB

Gene
N/A
Organism
Conus catus (Cat cone)
Status
Reviewed-Annotation score: Annotation score: 3 out of 5-Experimental evidence at protein leveli

Functioni

Omega-conotoxins act at presynaptic membranes, they bind and block voltage-gated calcium channels (Cav). This toxin blocks N-, P- and Q-type calcium channels.1 Publication

GO - Molecular functioni

GO - Biological processi

Complete GO annotation...

Keywords - Molecular functioni

Calcium channel impairing toxin, Ion channel impairing toxin, Neurotoxin, Presynaptic neurotoxin, Toxin, Voltage-gated calcium channel impairing toxin

Names & Taxonomyi

Protein namesi
Recommended name:
Omega-conotoxin CVIB
OrganismiConus catus (Cat cone)
Taxonomic identifieri101291 [NCBI]
Taxonomic lineageiEukaryotaMetazoaLophotrochozoaMolluscaGastropodaCaenogastropodaHypsogastropodaNeogastropodaConoideaConidaeConus

Organism-specific databases

ConoServeri1726. CVIB.

Subcellular locationi

GO - Cellular componenti

Complete GO annotation...

Keywords - Cellular componenti

Secreted

PTM / Processingi

Molecule processing

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Peptidei1 – 2525Omega-conotoxin CVIBPRO_0000044482Add
BLAST

Amino acid modifications

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Disulfide bondi1 ↔ 16By similarity
Disulfide bondi8 ↔ 20By similarity
Disulfide bondi15 ↔ 25By similarity
Modified residuei25 – 251Cysteine amide

Keywords - PTMi

Amidation, Disulfide bond

Expressioni

Tissue specificityi

Expressed by the venom duct.

Family & Domainsi

Domaini

The presence of a 'disulfide through disulfide knot' structurally defines this protein as a knottin.By similarity
The cysteine framework is VI/VII (C-C-CC-C-C).

Sequence similaritiesi

Belongs to the conotoxin O1 superfamily.Curated

Keywords - Domaini

Knottin

Family and domain databases

InterProiIPR012321. Conotoxin_omega-typ_CS.
[Graphical view]
PROSITEiPS60004. OMEGA_CONOTOXIN. 1 hit.
[Graphical view]

Sequencei

Sequence statusi: Complete.

P58918-1 [UniParc]FASTAAdd to basket

« Hide

        10         20 
CKGKGASCRK TMYDCCRGSC RSGRC
Length:25
Mass (Da):2,717
Last modified:July 26, 2002 - v1
Checksum:iD41A9E5F5AFA9552
GO

Cross-referencesi

3D structure databases

ModBaseiSearch...
MobiDBiSearch...

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Organism-specific databases

ConoServeri1726. CVIB.

Family and domain databases

InterProiIPR012321. Conotoxin_omega-typ_CS.
[Graphical view]
PROSITEiPS60004. OMEGA_CONOTOXIN. 1 hit.
[Graphical view]
ProtoNetiSearch...

Entry informationi

Entry nameiCO6B_CONCT
AccessioniPrimary (citable) accession number: P58918
Entry historyi
Integrated into UniProtKB/Swiss-Prot: July 26, 2002
Last sequence update: July 26, 2002
Last modified: July 22, 2015
This is version 51 of the entry and version 1 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programAnimal Toxin Annotation Program

Miscellaneousi

Keywords - Technical termi

Direct protein sequencing

Documents

  1. SIMILARITY comments
    Index of protein domains and families

Similar proteinsi

Links to similar proteins from the UniProt Reference Clusters (UniRef) at 100%, 90% and 50% sequence identity:
100%UniRef100 combines identical sequences and sub-fragments with 11 or more residues from any organism into one UniRef entry.
90%UniRef90 is built by clustering UniRef100 sequences that have at least 90% sequence identity to, and 80% overlap with, the longest sequence (a.k.a seed sequence).
50%UniRef50 is built by clustering UniRef90 seed sequences that have at least 50% sequence identity to, and 80% overlap with, the longest sequence in the cluster.