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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Stereospecificity of SP1 and SP2 substance P receptors.

Previous studies with N-terminal fragments of substance P (SP) have suggested the existence of two separate SP receptor populations. SP1 receptors are found in guinea pig ilea and rat colons. SP2 receptors are found in mouse spinal cords and rat salivary glands. We have now found that substitution of Gly9 in substance P's C-terminal hexapeptide leads to an analog (L-Pro9 SP6-11) which selectively and potently stimulates SP2 receptors. In contrast, substitution of the same residue with D-Proline results in a potent and selective agonist for SP1 receptors. The data dramatically confirm the distinction between SP1 and SP2 receptors and demonstrate that the two receptors have distinct stereochemical architectures.[1]

References

  1. Stereospecificity of SP1 and SP2 substance P receptors. Piercey, M.F., Dobry-Schreur, P.J., Masiques, N., Schroeder, L.A. Life Sci. (1985) [Pubmed]
 
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