Motilin (26-47), human, porcine 

Motilin (26-47), human, porcine is an endogenous motilin receptor ligand with K_i and EC₅₀ of 2.3 nM and 0.3 nM in a Chinese hamster ovary cell line.

EC50: 0.3 nM (motilin receptor, Chinese hamster ovary cell)^[1]
Ki: 2.3 nM (motilin receptor, Chinese hamster ovary cell)^[1]

[Bpa¹,Ile¹³]motilin is a full agonist at the motilin receptor that increases intracellular calcium in a concentration-dependent manner (EC₅₀ = 1.5 ± 0.4 nM)^[1]. Motilin binds with high affinity (IC₅₀ 0.7± 0.2 nM) to receptors on smooth muscle cells. Motilin selectively activates G(q) and G(13), stimulates G alpha(q)-dependent phosphoinositide (PI) hydrolysis and 1,4,5-trisphosphate (IP(3))-dependent Ca²⁺ release, and increases cytosolic free Ca²⁺. Motilin induces a biphasic, concentration-dependent contraction (EC₅₀ = 1.0 +/- 0.2 nM), consisting of an initial peak followed by a sustained contraction^[2].

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

2699.07

C₁₂₀H₁₈₈N₃₄O₃₅S

52906-92-0

Solid

White to off-white

Phe-Val-Pro-Ile-Phe-Thr-Tyr-Gly-Glu-Leu-Gln-Arg-Met-Gln-Glu-Lys-Glu-Arg-Asn-Lys-Gly-Gln

FVPIFTYGELQRMQEKERNKGQ

Room temperature in continental US; may vary elsewhere.

Sealed storage, away from moisture

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

• [1]. Coulie B, et al. Identification of peptide ligand-binding domains within the human motilin receptor using photoaffinity labeling. J Biol Chem. 2001 Sep 21;276(38):35518-22. Epub 2001 Jul 18.  [Content Brief]

  [2]. Huang J, et al. Signaling pathways mediating gastrointestinal smooth muscle contraction and MLC20 phosphorylation by motilin receptors. Am J Physiol Gastrointest Liver Physiol. 2005 Jan;288(1):G23-31.  [Content Brief]