PA2-GNU7 peptide

PA2-GNU7 peptide

• COA/MS/HPLC Report
• Handling and Storage of Synthetic Peptides
• Material Safety Data Sheets (MSDS)

Batch to batch variation of the purity

H-SQRKLAAKLTSKGGGRLLRPLLQLLKQKLR-OH

H-Ser-Gln-Arg-Lys-Leu-Ala-Ala-Lys-Leu-Thr-Ser-Lys-Gly-Gly-Gly-Arg-Leu-Leu-Arg-Pro-Leu-Leu-Gln-Leu-Leu-Lys-Gln-Lys-Leu-Arg-OH

30

95.2%

C₁₅₀H₂₇₆N₅₀O₃₇

3372.09

Synthetic

Powder

PA2(SQRKLAAKLTSK) is a targeting peptide that binds specifically to OprF porin on P. aeruginosa was identified by phage display peptide library screening. GNU7(RLLRPLLQLLKQKLR) is a de novo generated short a-helical AMP, displayed broad-spectrum activities against bacteria and fungi, including against clinically isolated drug-resistant strains under physiological salt and serum conditions, without cytotoxicity to human cells. Hybrid peptide PA2-GNU7 exhibited potent antimicrobial activity against P. aeruginosa without causing host toxicity. Confocal laser scanning microscopy analysis and time-kill experiments demonstrated that PA2-GNU7 exhibited a high degree of specificity for P. aeruginosa, and rapidly and selectively killed P. aeruginosa cells in mixed cultures. In addition, in vivo treatment efficacy of PA2-GNU7 was significantly greater than that of conventional antibiotics in a mouse model of MDR P. aeruginosa infection. PA2-GNU7 may be a promising template for further development as a novel anti-MDR P. aeruginosa therapeutic agent.

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

• Kim H, Jang JH, Kim SC, Cho JH. Development of a novel hybrid antimicrobial peptide for targeted killing of Pseudomonas aeruginosa. Eur J Med Chem. 2020

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.