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Protein

Potassium channel toxin alpha-KTx 1.11

Gene
N/A
Organism
Centruroides noxius (Mexican scorpion)
Status
Reviewed-Annotation score: -Experimental evidence at protein leveli

Functioni

Reversibly blocks the high conductance calcium-activated potassium channels composed of only alpha subunits (KCa1.1/KCNMA1). Unreversibly blocks the high conductance calcium-activated potassium channels composed of alpha and beta1 subunits (KCNMA1 and KCNMB1). Unreversibly and weakly blocks the high conductance calcium-activated potassium channels composed of alpha and beta4 (KCNMA1 and KCNMB4).1 Publication

Miscellaneous

Does not inhibit other potassium channels such as dSlo, Kv1.1/KCNA1, Kv11.1/KCNH2/ERG1, Kir2.2/KCNJ12, Shaker-IR, and voltage-independent/calcium-activated SK1/KCNN1, SK2/KCNN2 and SK3/KCNN3.1 Publication

Sites

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

GO - Molecular functioni

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 1.11
Alternative name(s):
Slotoxin1 Publication
Short name:
SloTx1 Publication
OrganismiCentruroides noxius (Mexican scorpion)
Taxonomic identifieri6878 [NCBI]
Taxonomic lineageiEukaryotaMetazoaEcdysozoaArthropodaChelicerataArachnidaScorpionesButhidaButhoideaButhidaeCentruroides

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
ChainiPRO_00002288231 – 37Potassium channel toxin alpha-KTx 1.11Add BLAST37

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Disulfide bondi7 ↔ 28By similarity
Disulfide bondi13 ↔ 33By similarity
Disulfide bondi17 ↔ 35By similarity

Keywords - PTMi

Disulfide bond

Expressioni

Tissue specificityi

Expressed by the venom gland.1 Publication

Structurei

3D structure databases

ProteinModelPortaliP0C182
SMRiP0C182
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Sequence similaritiesi

Family and domain databases

Gene3Di3.30.30.10, 1 hit
InterProiView protein in InterPro
IPR036574 Scorpion_toxin-like_sf
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.

P0C182-1 [UniParc]FASTAAdd to basket
« Hide
        10         20         30 
TFIDVDCTVS KECWAPCKAA FGVDRGKCMG KKCKCYV
Length:37
Mass (Da):4,092
Last modified:March 21, 2006 - v1
Checksum:i87352585F8F85028
GO

Mass spectrometryi

Molecular mass is 4082.82 Da from positions 1 - 37. 1 Publication

Similar proteinsi

Cross-referencesi

3D structure databases

ProteinModelPortaliP0C182
SMRiP0C182
ModBaseiSearch...
MobiDBiSearch...

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Family and domain databases

Gene3Di3.30.30.10, 1 hit
InterProiView protein in InterPro
IPR036574 Scorpion_toxin-like_sf
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 nameiKAX1B_CENNO
AccessioniPrimary (citable) accession number: P0C182
Entry historyiIntegrated into UniProtKB/Swiss-Prot: March 21, 2006
Last sequence update: March 21, 2006
Last modified: November 22, 2017
This is version 38 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
  2. Scorpion potassium channel toxins
    Nomenclature of scorpion potassium channel toxins and list of entries
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Main funding by: National Institutes of Health

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