2. Membrane Transporter/Ion Channel
  3. Potassium Channel
  4. OSK-1

OSK-1 is a potent Kv channel blocker with IC50s of of 0.6 nM, 5.4 nM, 0.014 nM for Kv1.1, Kv1.2 and Kv1.3, respectively. OSK1 is a moderate blocker of Ca2+-activated KCa3.1 channel with an IC50 of 225 nM. OSK-1 belongs to α-KTx3 toxins and is used as a immunosuppressive agent.

For research use only. We do not sell to patients.

Custom Peptide Synthesis

OSK-1 Chemical Structure

OSK-1 Chemical Structure

CAS No. : 183815-75-0

Size Stock
50 mg   Get quote  
100 mg   Get quote  
250 mg   Get quote  
Synthetic products have potential research and development risk.

* Please select Quantity before adding items.

This product is a controlled substance and not for sale in your territory.

OSK-1 Related Antibodies

Top Publications Citing Use of Products

  • Biological Activity

  • Purity & Documentation

  • References

  • Customer Review

Description

OSK-1 is a potent Kv channel blocker with IC50s of of 0.6 nM, 5.4 nM, 0.014 nM for Kv1.1, Kv1.2 and Kv1.3, respectively. OSK1 is a moderate blocker of Ca2+-activated KCa3.1 channel with an IC50 of 225 nM. OSK-1 belongs to α-KTx3 toxins and is used as a immunosuppressive agent[1].

IC50 & Target

IC50: 0.6 nM (Kv1.1), 5.4 nM (Kv1.2), 0.014 nM (Kv1.3) and 225 nM (KCa3.1)[1]
In Vitro

OSK1 has no effect on KCa2.1, KCa2.2, KCa2.3 and KCa1.1 channels when in the micromolar concentration range, whereas it shows a moderate activity on KCa3.1 channel (also referred to as IK1 or SK4) with an IC50 value of 225 nM[1].

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

OSK-1 Related Antibodies
In Vivo

OSK1 is lethal in mice by intracerebroventricular injection, with a LD50 (50% lethal dose) value of 2 μg/kg[1].

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.
Molecular Weight

4205.17

Formula

C177H300N56O46S8
CAS No.
Shipping

Room temperature in continental US; may vary elsewhere.
Storage

Please store the product under the recommended conditions in the Certificate of Analysis.
Solvent & Solubility
In Vitro: 

H2O

Peptide Solubility and Storage Guidelines:

1.  Calculate the length of the peptide.

2.  Calculate the overall charge of the entire peptide according to the following table:

  Contents Assign value
Acidic amino acid Asp (D), Glu (E), and the C-terminal -COOH. -1
Basic amino acid Arg (R), Lys (K), His (H), and the N-terminal -NH2 +1
Neutral amino acid Gly (G), Ala (A), Leu (L), Ile (I), Val (V), Cys (C), Met (M), Thr (T), Ser (S), Phe (F), Tyr (Y), Trp (W), Pro (P), Asn (N), Gln (Q) 0

3.  Recommended solution:

Overall charge of peptide Details
Negative (<0) 1.  Try to dissolve the peptide in water first.
2.  If water fails, add NH4OH (<50 μL).
3.  If the peptide still does not dissolve, add DMSO (50-100 μL) to solubilize the peptide.
Positive (>0) 1.  Try to dissolve the peptide in water first.
2.  If water fails, try dissolving the peptide in a 10%-30% acetic acid solution.
3.  If the peptide still does not dissolve, try dissolving the peptide in a small amount of DMSO.
Zero (=0) 1.  Try to dissolve the peptide in organic solvent (acetonitrile, methanol, etc.) first.
2.  For very hydrophobic peptides, try dissolving the peptide in a small amount of DMSO, and then dilute the solution with water to the desired concentration.
Purity & Documentation
References
  • No file chosen (Maximum size is: 1024 Kb)
  • If you have published this work, please enter the PubMed ID.
  • Your name will appear on the site.

OSK-1 Related Classifications

  • Molarity Calculator

  • Dilution Calculator

The molarity calculator equation

Mass (g) = Concentration (mol/L) × Volume (L) × Molecular Weight (g/mol)

Mass   Concentration   Volume   Molecular Weight *
= × ×

The dilution calculator equation

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)

This equation is commonly abbreviated as: C1V1 = C2V2

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)
× = ×
C1   V1   C2   V2
Help & FAQs
  • Do most proteins show cross-species activity?

    Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.

Keywords:

OSK-1183815-75-0OSK1OSK 1Potassium ChannelKcsAKv1.1Kv1.2Kv1.3KCa3.1KCa2.1KCa2.2KCa2.3KCa1.1immunosuppressive drugα-KTx3 toxinInhibitorinhibitorinhibit

Your Recently Viewed Products:

Inquiry Online

Your information is safe with us. * Required Fields.

Product Name

  

Salutation

Applicant Name *

 

Email Address *

Phone Number *

 

Organization Name *

Department *

 

Requested quantity *

Country or Region *

      

Remarks

Bulk Inquiry

Inquiry Information

Product Name:
OSK-1
Cat. No.:
HY-P3316
Quantity:
MCE Japan Authorized Agent:

Customer Review

Thank You for Your Feedback!

Request for HNMR Report

Please fill out this form to request the QC report. We will send it to your Email address shortly.

Your information is safe with us. * Required Fields.

Product Name

  

Lot #

Applicant Name *

 

Email Address *

Phone Number

 

Department *

Organization Name *

 

Country or Region *

Remarks

SAFETY DATA SHEET (SDS)

English - EN (0 KB) Français - FR (0 KB) Deutsch - DE (0 KB) Norwegian - NO (0 KB) Español - ES (0 KB) Swedish - SV (0 KB)

Request for HNMR Report

We have received your request and will respond to you as soon as possible.