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Protein

Alpha-conotoxin CtIA

Gene
N/A
Organism
Conus tinianus (Variable cone)
Status
Reviewed-Annotation score: -Experimental evidence at protein leveli

Functioni

Alpha-conotoxins act on postsynaptic membranes, they bind to the nicotinic acetylcholine receptors (nAChR) and thus inhibit them. This toxin is an antagonist of all rat neuronal alpha-3-beta-2/CHRNA3-CHRNB2, alpha-4-beta-2/CHRNA4-CHRNB2 and alpha-7/CHRNA7 nAChR subtypes.1 Publication

GO - Molecular functioni

Keywordsi

Molecular functionAcetylcholine receptor inhibiting toxin, Ion channel impairing toxin, Neurotoxin, Postsynaptic neurotoxin, Toxin

Names & Taxonomyi

Protein namesi
Recommended name:
Alpha-conotoxin CtIA1 Publication
OrganismiConus tinianus (Variable cone)
Taxonomic identifieri909294 [NCBI]
Taxonomic lineageiEukaryotaMetazoaLophotrochozoaMolluscaGastropodaCaenogastropodaNeogastropodaConoideaConidaeConusFloraconus

Subcellular locationi

Extracellular region or secreted Cytosol Plasma membrane Cytoskeleton Lysosome Endosome Peroxisome ER Golgi apparatus Nucleus Mitochondrion Manual annotation Automatic computational assertionGraphics by Christian Stolte; Source: COMPARTMENTS

Keywords - Cellular componenti

Secreted

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
PeptideiPRO_00004021371 – 16Alpha-conotoxin CtIAAdd BLAST16

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Disulfide bondi3 ↔ 9By similarity
Disulfide bondi4 ↔ 16By similarity
Modified residuei15Sulfotyrosine1 Publication1
Modified residuei16Cysteine amide1 Publication1

Keywords - PTMi

Amidation, Disulfide bond, Sulfation

Expressioni

Tissue specificityi

Expressed by the venom duct.1 Publication

Family & Domainsi

Domaini

The cysteine framework is I (CC-C-C). Alpha4/6 pattern.Curated

Sequence similaritiesi

Belongs to the conotoxin A superfamily.Curated

Sequencei

Sequence statusi: Complete.

Length:16
Mass (Da):1,669
Last modified:November 30, 2010 - v1
Checksum:i5DBB1199E9998E12
GO

Mass spectrometryi

Molecular mass is 1742.44 Da from positions 1 - 16. Determined by ESI. 1 Publication

Similar proteinsi

Cross-referencesi

3D structure databases

ModBaseiSearch...
MobiDBiSearch...

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Family and domain databases

ProtoNetiSearch...

Entry informationi

Entry nameiCA1A_CONTI
AccessioniPrimary (citable) accession number: P0CI05
Entry historyiIntegrated into UniProtKB/Swiss-Prot: November 30, 2010
Last sequence update: November 30, 2010
Last modified: September 12, 2018
This is version 20 of the entry and version 1 of the sequence. See 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
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Main funding by: National Institutes of Health

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