MANS peptide

MANS peptide

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

Batch to batch variation of the purity

Myrisitic Acid-GAQFSKTAAKGEAAAERPGEAAVA-OH

Myrisitic Acid-Gly-Ala-Gln-Phe-Ser-Lys-Thr-Ala-Ala-Lys-Gly-Glu-Ala-Ala-Ala-Glu-Arg-Pro-Gly-Glu-Ala-Ala-Val-Ala-OH

24

95.06%

C₁₁₁H₁₈₄N₃₀O₃₅

2498.81

Synthetic

Powder

Myristoylated alanine-rich C kinase substrate (MARCKS) is a ubiquitously expressed protein kinase C substrate that has emerged as a potential therapeutic target for the amelioration of mucin secretion and inflammation in patients with chronic obstructive pulmonary disease. MANS (myristoylated N-terminal sequence) is the well-characterized human MARCKS inhibitory peptide. Pretreatment of canine neutrophils with MANS peptide significantly reduced both mRNA and protein expression in a broad range of LPS-induced cytokines, including IL-8, a chemokine (C-X-C motif) ligand–1 orthologue, and TNF-α, in comparison with untreated cells or those treated with a control peptide.

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

• Li J, D'Annibale-Tolhurst MA, Adler KB, Fang S, Yin Q, Birkenheuer AJ, Levy MG, Jones SL, Sung EJ, Hawkins EC, Yoder JA, Nordone SK. A myristoylated alanine-rich C kinase substrate-related peptide suppresses cytokine mRNA and protein expression in LPS-activated canine neutrophils. Am J Respir Cell Mol Biol. 2013 Mar;48(3):314-21. doi: 10.1165/rcmb.2012-0278OC. Epub 2012 Dec 6. PMID: 23221047; PMCID: PMC3604091.

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.