Pheromonotropin (Pseudaletia separata), Pheromonotropic neuropeptide

Pheromonotropin (Pseudaletia separata), Pheromonotropic neuropeptide

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

Batch to batch variation of the purity

KLSYDDKVFENVEFTPRL

H-Lys-Leu-Ser-Tyr-Asp-Asp-Lys-Val-Phe-Glu-Asn-Val-Glu-Phe-Thr-Pro-Arg-Leu-NH2

18

96.4%

C₁₀₁H₁₅₅N₂₅O₃₀

2199.49

Synthetic

Powder

This pheromonotropic neuropeptide has originally been isolated from head extracts of the armyworm larvae, Pseudaletia separata. The C-terminal pentapeptide of PssPT, which is essential for the biological activity, is identical in sequence with the active core of leucopyrokinin, an insect myotropic neuropeptide. Based on the physiological function of PssPT in lepidopteran insects, the name Pseudaletia MRCH (melanization and reddish coloration hormone) has been proposed.

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

• S.Matsumoto et al., Biochem. Biophys. Res. Commun., 182, 534 (1992)
• S.Matsumoto et al., J. Insect Physiol., 38, 847 (1992)

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.