PLP (139-151) peptide

PLP (139-151) peptide

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

Batch to batch variation of the purity

H-HCLGKWLGHPDKF-OH

H-His-Cys-Leu-Gly-Lys-Trp-Leu-Gly-His-Pro-Asp-Lys-Phe-OH

13

95.8%

C₇₂H₁₀₄N₂₀O₁₆S

1537.78

Synthetic

Powder

PLP (139-151), or proteolipid protein (139-151) is a myelin proteolipid protein (PLP) fragment. PLP is one of the major protein constituents of myelin, along with myelin oligodendrocyte glycoprotein (MOG) and myelin basic protein (MBP), which between them make up 15% - 25% of dry weight, the rest being mainly lipids. Myelin has an essential insulating role for nerves, allowing normal motor function, sensory function and cognition. Animals immunized with PLP (139-151) develop severe experimental allergic encephalomyelitis (EAE) and this model is widely used to study human multiple sclerosis (MS).

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

• Tuohy et al (1989) Identification of an encephalitogenic determinant of myelin proteolipid protein for SJL mice. J.Immunol. 142 1523 PMID: 2465343
• Kuchroo et al (1991) Induction of experimental allergic encephalomyelitis by myelin proteolipid-protein-specific T cell clones and synthetic peptides. Pathobiology 59 305 PMID: 1716908
• Tigno-Aranjuez et al (2009) Encephalitogenicity of Complete Freund's Adjuvant Relative to CpG Is Linked to Induction of Th17 Cells. J. Immunol. 183(9) 5654 PMID: 19812193

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.