Competence-Stimulating Peptide-2 (CSP-2)
Based on 1 Customer Validation
Competence-Stimulating Peptide-2 (CSP-2) is a 17-amino acid signal peptide produced by Streptococcus pneumoniae, with an EC50 of 50.7 nM for its compatible receptor ComD2. Competence-Stimulating Peptide-2 (CSP-2) can regulate bacterial phenotypes such as competence development, virulence, and biofilm formation through quorum sensing.
For research use only. We do not sell to patients.
- Purity: 99.45%
- CAS No.: 1174553-84-4
- Formula: C101H172N28O23S
- Molecular Weight:2178.69
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Storage:
Stored under nitrogen, away from moisture.
Powder -80°C, 2 years , -20°C, 1 year* In solvent : -80°C, 6 months; -20°C, 1 month (stored under nitrogen, away from moisture)
To place orders, for customer services and technical support, please contact: MedChemExpress USA
Tel: 609-228-6898 E-mail: [email protected] [email protected]
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Biological Activity
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Chemical Information
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Solvent & Solubility
- Purity & Documentation
- References
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Help & FAQs
Biological Activity
Competence-Stimulating Peptide-2 (CSP-2) works together with CSP1 (HY-P2454) to induce competence in the NESp strain MNZ41, enabling it to take up exogenous DNA and undergo transformation[2].
MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.
Chemical Information
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CAS No. 1174553-84-4
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Appearance Solid
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Molecular Weight 2178.69
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Formula C101H172N28O23S
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Color White to off-white
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Sequence Shortening
EMRISRIILDFLFLRKK
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Shipping
Room temperature in continental US; may vary elsewhere.
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Storage
Stored under nitrogen, away from moisture
Powder -80°C 2 years -20°C 1 year * In solvent : -80°C, 6 months; -20°C, 1 month (stored under nitrogen, away from moisture)
Solvent & Solubility
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
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Data Sheet (258 KB)
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SDS (252 KB)
- English - EN (252 KB)
- Français - FR (252 KB)
- Deutsch - DE (252 KB)
- Norwegian - NO (252 KB)
- Español - ES (252 KB)
- Swedish - SV (252 KB)
- Italian - IT (252 KB)
- Korean - KR (252 KB)
- Portuguese - PT (252 KB)
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Handling Instructions (2659 KB)
References
[1]. Yifang Yang, et al. Structural Characterization of Competence-Stimulating Peptide Analogues Reveals Key Features for ComD1 and ComD2 Receptor Binding in Streptococcus pneumonia. Biochemistry. 2018 Sep 11;57(36):5359-5369. [Content Brief]
[2]. Bradshaw JL, et al. Transformation of nonencapsulated Streptococcus pneumoniae during systemic infection. Sci Rep. 2020 Nov 3;10(1):18932. [Content Brief]
Calculators
Concentration (start) × Volume (start) = Concentration (final) × Volume (final)
Competence-Stimulating Peptide-2 (CSP-2) Related Classifications
HY-P2522 Related Classifications
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