Formyl Peptide Receptor-Like 1 Antagonist, WRW⁴

A Trp-rich hexapeptide that acts as a potent and specific antagonist of Formyl Peptide Receptor-Like 1 (FPRL1)-mediated signaling. Shown to bind to FPRL1 and interfere with the ligand-receptor interaction {IC₅₀ = 230 nM for FPRL1 Agonist, WKYMVm (Cat. No. 344216)}. Completely blocks the ligand activated [Ca²⁺]_i increase, ERK activation and chemotactic migration of FPRL1-expressing RBL-2H3 cells at 10 µM. Further, inhibits Aβ₄₂ peptide-induced superoxide generation and prevents its internalization in human macrophages.

Cell permeable: no

Primary Target
Formyl Peptide Receptor-Like 1 (FPRL1)

Product does not compete with ATP.

Reversible: no

Target IC₅₀: 230 nM for FPRL1 Agonist

Packaged under inert gas

Toxicity: Standard Handling (A)

H-Trp-Arg-Trp-Trp-Trp-Trp-CONH₂

Supplied as a trifluoroacetate salt.

Following reconstitution, aliquot and freeze (-20°C). Stock solutions are stable for up to 6 months at -20°C.

Bae, Y.S., et al. 2004. J. Immunol.173, 607.

CALBIOCHEM is a registered trademark of Merck KGaA, Darmstadt, Germany