Skip Header

You are using a version of browser that may not display all the features of this website. Please consider upgrading your browser.
Protein

Potassium channel toxin alpha-KTx 1.3

Gene
N/A
Organism
Mesobuthus tamulus (Eastern Indian scorpion) (Buthus tamulus)
Status
Reviewed-Annotation score: Annotation score: 3 out of 5-Experimental evidence at protein leveli

Functioni

Blocks selectively the high conductance calcium-activated (maxi-K) potassium channels (KCa1.1/KCNMA1).

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Sitei27Basic residue of the functional dyadBy similarity1
Sitei36Aromatic residue of the functional dyadBy similarity1

GO - Molecular functioni

GO - Biological processi

Keywordsi

Molecular functionCalcium-activated potassium channel impairing toxin, Ion channel impairing toxin, Neurotoxin, Potassium channel impairing toxin, Toxin

Names & Taxonomyi

Protein namesi
Recommended name:
Potassium channel toxin alpha-KTx 1.3
Alternative name(s):
Iberiotoxin1 Publication
Short name:
IbTx1 Publication
OrganismiMesobuthus tamulus (Eastern Indian scorpion) (Buthus tamulus)
Taxonomic identifieri34647 [NCBI]
Taxonomic lineageiEukaryotaMetazoaEcdysozoaArthropodaChelicerataArachnidaScorpionesButhidaButhoideaButhidaeMesobuthus

Subcellular locationi

GO - Cellular componenti

Keywords - Cellular componenti

Secreted

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
PeptideiPRO_00000448991 – 37Potassium channel toxin alpha-KTx 1.3Add BLAST37

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Modified residuei1Pyrrolidone carboxylic acid1 Publication1
Disulfide bondi7 ↔ 281 Publication
Disulfide bondi13 ↔ 331 Publication
Disulfide bondi17 ↔ 351 Publication

Keywords - PTMi

Disulfide bond, Pyrrolidone carboxylic acid

Expressioni

Tissue specificityi

Expressed by the venom gland.

Structurei

3D structure databases

ProteinModelPortaliP24663.
SMRiP24663.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Region

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Regioni26 – 33Interaction with Ca(2+)-activated K(+) channelsSequence analysis8

Sequence similaritiesi

Family and domain databases

Gene3Di3.30.30.10. 1 hit.
InterProiView protein in InterPro
IPR003614. Scorpion_toxin-like.
IPR001947. Scorpion_toxinS_K_inh.
PfamiView protein in Pfam
PF00451. Toxin_2. 1 hit.
PRINTSiPR00286. CHARYBDTOXIN.
ProDomiView protein in ProDom or Entries sharing at least one domain
PD003586. Scorpion_toxinS. 1 hit.
SUPFAMiSSF57095. SSF57095. 1 hit.
PROSITEiView protein in PROSITE
PS01138. SCORP_SHORT_TOXIN. 1 hit.

Sequencei

Sequence statusi: Complete.

P24663-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30 
QFTDVDCSVS KECWSVCKDL FGVDRGKCMG KKCRCYQ
Length:37
Mass (Da):4,254
Last modified:February 1, 1994 - v2
Checksum:i012D5EFA710C950E
GO

Sequence databases

PIRiS32792.

Cross-referencesi

Sequence databases

PIRiS32792.

3D structure databases

ProteinModelPortaliP24663.
SMRiP24663.
ModBaseiSearch...
MobiDBiSearch...

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Family and domain databases

Gene3Di3.30.30.10. 1 hit.
InterProiView protein in InterPro
IPR003614. Scorpion_toxin-like.
IPR001947. Scorpion_toxinS_K_inh.
PfamiView protein in Pfam
PF00451. Toxin_2. 1 hit.
PRINTSiPR00286. CHARYBDTOXIN.
ProDomiView protein in ProDom or Entries sharing at least one domain
PD003586. Scorpion_toxinS. 1 hit.
SUPFAMiSSF57095. SSF57095. 1 hit.
PROSITEiView protein in PROSITE
PS01138. SCORP_SHORT_TOXIN. 1 hit.
ProtoNetiSearch...

Entry informationi

Entry nameiKAX13_MESTA
AccessioniPrimary (citable) accession number: P24663
Entry historyiIntegrated into UniProtKB/Swiss-Prot: March 1, 1992
Last sequence update: February 1, 1994
Last modified: May 10, 2017
This is version 76 of the entry and version 2 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. Scorpion potassium channel toxins
    Nomenclature of scorpion potassium channel toxins and list of entries
  2. 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.