Tamapin (T3D2525)

IdentificationTaxonomyBiological PropertiesPhysical PropertiesToxicity ProfileSpectraConcentrationsLinksReferencesGene RegulationTargets (3)XML
Targets (3)
Record Information
Version2.0
Creation Date2009-07-03 22:19:11 UTC
Update Date2014-12-24 20:25:39 UTC
Accession NumberT3D2525
Identification
Common NameTamapin
ClassProtein
DescriptionTamapin is a peptide toxin produced by the Eastern Indian scorpion (Mesobuthus tamulus). It blocks small conductance calcium-dependent potassium channels. (2)
Compound Type
  • Amide
  • Amine
  • Animal Toxin
  • Natural Compound
  • Organic Compound
  • Protein
  • Scorpion Toxin
Protein StructureT3d2525
Synonyms
Synonym
Potassium channel toxin alpha-KTx 5.4
Chemical FormulaNot Available
Average Molecular Mass3465.100 g/mol
CAS Registry Number508220-81-3
SequenceNot Available
Chemical Taxonomy
DescriptionNot Available
KingdomOrganic Compounds
Super ClassOrganic Acids
ClassCarboxylic Acids and Derivatives
Sub ClassAmino Acids, Peptides, and Analogues
Direct ParentPeptides
Alternative ParentsNot Available
SubstituentsNot Available
Molecular FrameworkNot Available
External DescriptorsNot Available
Biological Properties
StatusDetected and Not Quantified
OriginExogenous
Cellular LocationsNot Available
Biofluid LocationsNot Available
Tissue LocationsNot Available
PathwaysNot Available
ApplicationsNot Available
Biological RolesNot Available
Chemical RolesNot Available
Physical Properties
StateLiquid
AppearanceClear solution.
Experimental Properties
PropertyValue
Melting PointNot Available
Boiling PointNot Available
Solubility>10 mg/mL
LogPNot Available
Predicted PropertiesNot Available
Spectra
SpectraNot Available
Toxicity Profile
Route of ExposureInjection (sting/bite) (3)
Mechanism of ToxicityTamapin is a selective, potent, and reversible blocker of small conductance calcium-dependent potassium channels. It inhibits SK2 with the highest affinity, SK3 with an intermediate affinity and has the lowest affinity for SK1 channels. (2)
MetabolismFree toxin may be removed by opsonization via the reticuloendothelial system (primarily the liver and kidneys) or it may be degraded through cellular internalization via the lysosomes. Lysosomes are membrane-enclosed organelles that contain an array of digestive enzymes, including several proteases.
Toxicity ValuesNot Available
Lethal DoseNot Available
Carcinogenicity (IARC Classification)No indication of carcinogenicity to humans (not listed by IARC).
Uses/SourcesTamapin is a peptide toxin produced by the Eastern Indian scorpion (Mesobuthus tamulus). (2)
Minimum Risk LevelNot Available
Health EffectsTamapin is neurotoxic. (2)
SymptomsScorpion stings cause tingling or burning at the site of the sting. In more severe cases, symptoms may include spasm in the throat, feeling of thick tongue, restlessness, muscular fibrillation, abdominal cramps, convulsions, incontinence, hypertension, hypotension, oliguria, cardiac arrhythmias, pulmonary edema, and respiratory failure. (1)
TreatmentNot Available
Normal Concentrations
Not Available
Abnormal Concentrations
Not Available
DrugBank IDNot Available
HMDB IDNot Available
PubChem Compound IDNot Available
ChEMBL IDNot Available
ChemSpider IDNot Available
KEGG IDNot Available
UniProt IDP59869
OMIM ID
ChEBI IDNot Available
BioCyc IDNot Available
CTD IDNot Available
Stitch IDNot Available
PDB ID2CF1
ACToR IDNot Available
Wikipedia LinkNot Available
References
Synthesis ReferenceNot Available
MSDSNot Available
General References
  1. Dreisbach, RH (1983). Handbook of Poisoning. Los Altos, California: Lange Medical Publications.
  2. Wikipedia. Tamapin. Last Updated 2 October 2008. [Link]
  3. Wikipedia. Scorpion toxin. Last Updated 12 July 2009. [Link]
Gene Regulation
Up-Regulated GenesNot Available
Down-Regulated GenesNot Available

Targets

Target Details
1. Small conductance calcium-activated potassium channel protein 1
General Function:
Small conductance calcium-activated potassium channel activity
Specific Function:
Forms a voltage-independent potassium channel activated by intracellular calcium. Activation is followed by membrane hyperpolarization. Thought to regulate neuronal excitability by contributing to the slow component of synaptic afterhyperpolarization. The channel is blocked by apamin (By similarity).
Gene Name:
KCNN1
Uniprot ID:
Q92952
Molecular Weight:
59986.87 Da
References
  1. Wikipedia. Tamapin. Last Updated 2 October 2008. [Link]
Target Details
2. Small conductance calcium-activated potassium channel protein 2
General Function:
Small conductance calcium-activated potassium channel activity
Specific Function:
Forms a voltage-independent potassium channel activated by intracellular calcium. Activation is followed by membrane hyperpolarization. Thought to regulate neuronal excitability by contributing to the slow component of synaptic afterhyperpolarization. The channel is blocked by apamin.
Gene Name:
KCNN2
Uniprot ID:
Q9H2S1
Molecular Weight:
63759.03 Da
References
  1. Wikipedia. Tamapin. Last Updated 2 October 2008. [Link]
Target Details
3. Small conductance calcium-activated potassium channel protein 3
General Function:
Small conductance calcium-activated potassium channel activity
Specific Function:
Forms a voltage-independent potassium channel activated by intracellular calcium. Activation is followed by membrane hyperpolarization. Thought to regulate neuronal excitability by contributing to the slow component of synaptic afterhyperpolarization. The channel is blocked by apamin.
Gene Name:
KCNN3
Uniprot ID:
Q9UGI6
Molecular Weight:
82025.305 Da
References
  1. Wikipedia. Tamapin. Last Updated 2 October 2008. [Link]