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

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Perrin, M. et al.

Identification of a second corticotropin-releasing factor receptor gene and characterization of a cDNA expressed in heart.

Corticotropin-releasing factor ( CRF; corticoliberin) regulates the secretion of corticotropin ( ACTH) and beta-endorphin and has a broad range of effects on the nervous, endocrine, reproductive, cardiovascular, gastrointestinal, and immune systems. Recently, human, rat, and mouse CRF receptors (CRF-R) have been cloned and functionally and anatomically characterized. We report here the cloning of a second CRF-R cDNA (CRF-RB), which encodes a protein of 431 amino acids, which is 16 amino acids longer and 68% similar to the previously cloned CRF-R, CRF-RA. When transiently expressed in COS-M6 cells, CRF-RB binds CRF with high affinity [Kd = 1.2 (0.57-2.5)nM] and transduces the CRF-stimulated signal of the accumulation of intracellular cAMP, which is inhibited by a CRF antagonist. Comparison of the amino acid sequences of CRF-RB and the previously cloned receptor reveals major differences in the N-terminal domain and in the extracellular loops, whereas the sequences of the intracellular loops are nearly identical. CRF-RB and related transcripts are expressed in the heart, as well as in other tissues, including the gastrointestinal tract, epididymis, and brain.[1]

References

Identification of a second corticotropin-releasing factor receptor gene and characterization of a cDNA expressed in heart. Perrin, M., Donaldson, C., Chen, R., Blount, A., Berggren, T., Bilezikjian, L., Sawchenko, P., Vale, W. Proc. Natl. Acad. Sci. U.S.A. (1995) [Pubmed]

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