CATH-2 (chicken) peptide

CATH-2 (chicken) peptide

• Handling and Storage of Synthetic Peptides
• Material Safety Data Sheets (MSDS)

Batch to batch variation of the purity

H-RFGRFLRKIRRFRPKVTITIQGSARF-NH2

H-Arg-Phe-Gly-Arg-Phe-Leu-Arg-Lys-Ile-Arg-Arg-Phe-Arg-Pro-Lys-Val-Thr-Ile-Thr-Ile-Gln-Gly-Ser-Ala-Arg-Phe-NH2

26

95.41%

C₁₄₇H₂₄₅N₅₁O₃₀

3206.83

Synthetic

Powder

CATH-2 (chicken) is one of four cathelicidins which have been identified in chickens. Cathelicidins constitute a family of host defense peptides (HDPs) and play an important role during the innate immune response and CATH-2 displays strong antimicrobial activities against many different pathogens including gram-positive and gram-negative bacteria and fungi. In addition, CATH-2 has been shown to have immunomodulatory capacities.

Normally, this peptide will be delivered in lyophilized form and should be stored in a freezer at or below -20 °C. For more details, please refer to the manual: Handling and Storage of Synthetic Peptides

• Cuperus et al (2013) Avian host defense peptides. Develop. Comp. Immunol. 41(3) 352 PMID: 24583933
• Ordonez et al (2014) Fungicidal Mechanisms of Cathelicidins LL-37 and CATH-2 Revealed by Live-Cell Imaging. Antimicrob. Agents Chemother. 58(4) 2240 PMID: 24492359
• Scheenstra et al (2019) Cathelicidins PMAP-36, LL-37 and CATH-2 are similar peptides with different modes of action. Sci Rep 9 4780 PMID: 30886247

Trifluoroacetic acid (TFA) has a significant impact on peptides due to its role in the peptide synthesis process.

TFA is essential for the protonation of peptides that lack basic amino acids such as Arginine (Arg), Histidine (His), and Lysine (Lys), or ones that have blocked N-termini. As a result, peptides often contain TFA salts in the final product.

TFA residues, when present in custom peptides, can cause unpredictable fluctuations in experimental data. At a nanomolar (nM) level, TFA can influence cell experiments, hindering cell growth at low concentrations (as low as 10 nM) and promoting it at higher doses (0.5–7.0 mM). It can also serve as an allosteric regulator on the GlyR of glycine receptors, thereby increasing receptor activity at lower glycine concentrations.

In an in vivo setting, TFA can trifluoroacetylate amino groups in proteins and phospholipids, inducing potentially unwanted antibody responses. Moreover, TFA can impact structure studies as it affects spectrum absorption.