TAT-QFNP12 peptide

TAT-QFNP12 peptide

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

Batch to batch variation of the purity

H-YGRKKRRQRRRVKKEAELDKYLE-OH

H-Tyr-Gly-Arg-Lys-Lys-Arg-Arg-Gln-Arg-Arg-Arg-Val-Lys-Lys-Glu-Ala-Glu-Leu-Asp-Lys-Tyr-Leu-Glu-OH

23

95.97%

C₁₃₀H₂₂₅N₄₇O₃₅

3006.46

Synthetic

Powder

TAT-QFNP12 is a peptide corresponding to the 302 to 313 amino acid domain of the protein phosphatase PPM1A, made cell permeable by the addition of TAT, and is a key fragment involved in the binding of PPM1A to the cytoplasmic protein NDRG2. TAT-QFNP12 blockade of the binding of NDRG2 with PPM1A allows PPM1A to enter the nucleus and dephosphorylate Smad2/3, preventing transcription and production of matrix metalloproteinase 9 (MMP-9). Unwanted increased levels of MMP-9 have an important part in blood-brain barrier (BBB) injury in subarachnoid haemorrhage (SAH) and can critically exacerbate poor prognosis. In mouse models of SAH, TAT-QFNP12 dose-dependently inhibits MMP-9 expression and Smad2/3 phosphorylation, and significantly reduces brain edema and neurological deficits, demonstrating that TAT-QFNP12 can protect the blood-brain barrier after SAH and alleviate secondary nerve injury.

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

• Feng et al (2022) Astrocytic NDRG2-PPM1A interaction exacerbates blood-brain barrier disruption after subarachnoid hemorrhage. Sci Adv. 8(39) eabq2423 PMID: 36179025

Trifluoroacetic acid (TFA) is a common counterion from the purification process using High-Performance Liquid Chromatography (HPLC). The presence of TFA can affect the peptide's net weight, appearance, and solubility.

Impact on Net Weight: The TFA salt contributes to the total mass of the product. In most cases, the peptide content constitutes >80% of the total weight, with TFA accounting for the remainder.

Solubility: TFA salts generally enhance the solubility of peptides in aqueous solutions.

In Biological Assays: For most standard in vitro assays, the residual TFA levels do not cause interference. However, for highly sensitive cellular or biochemical studies, please be aware of its presence.