KYL peptide 

KYL peptide, an antagonistic peptide, selectively targets EphA4 receptor (IC₅₀:4.22 μM, Kd:1.3 μM). KYL peptide binds to the ligand-binding domain of EphA4, effectively alleviates Aβ-induced synaptic dysfunction and synaptic plasticity defects in AD mice. KYL peptide can promote nerve regeneration after injury and modulating immune responses^[1][2][3].

KYL peptide blocks the extracellular ligand-binding domain of EphA4, abolishes the Aβ-stimulated EphA4 tyrosine phosphorylation^[2].
KYL peptide abolishes the Aβ-triggered reduction of dendritic spines in cultured hippocampal neurons^[2].

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

1465.73

C₇₄H₁₀₈N₁₄O₁₇

676657-00-4

Solid

White to off-white

KYLPYWPVLSSL

Room temperature in continental US; may vary elsewhere.

Sealed storage, away from moisture and light, under nitrogen

*In solvent : -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture and light, under nitrogen)

* Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture and light, under nitrogen). When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.

* Note: If you choose water as the stock solution, please dilute it to the working solution, then filter and sterilize it with a 0.22 μm filter before use.

• [1]. Wu B, et.al. HTS by NMR of combinatorial libraries: a fragment-based approach to ligand discovery. Chem Biol. 2013 Jan 24;20(1):19-33.  [Content Brief]

  [2]. Lamberto I, et, al. Distinctive binding of three antagonistic peptides to the ephrin-binding pocket of the EphA4 receptor. Biochem J. 2012 Jul 1;445(1):47-56.  [Content Brief]

  [3]. Fu AKY, et, al. Blockade of EphA4 signaling ameliorates hippocampal synaptic dysfunctions in mouse models of Alzheimer's disease. Proc Natl Acad Sci U S A. 2014 Jul 8;111(27):9959-64.  [Content Brief]