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  • Title: Molecular cloning and expression of rat bradykinin B1 receptor.
    Author: Ni A, Chai KX, Chao L, Chao J.
    Journal: Biochim Biophys Acta; 1998 Nov 08; 1442(2-3):177-85. PubMed ID: 9804950.
    Abstract:
    The gene encoding rat bradykinin B1 receptor has been cloned by using a partial rat B1 cDNA probe. The rat B1 receptor gene contains two exons and the entire coding region is within the second exon. The 5'-flanking region of the rat B1 receptor gene contains several putative transcriptional regulatory sites including TATA box, cAMP response element, NF-kappaB and AP-1. It showed promoter activity inducible by lipopolysaccharide in vascular smooth muscle cells. Rat B1 receptor mRNA was found to be alternatively spliced and induced by lipopolysaccharide treatment in a wide range of tissues, such as the salivary gland, testis, kidney, lung, heart, prostate and aorta. The deduced rat B1 receptor amino acid sequence is 71% homologous to human and rabbit counterparts, and 89% homologous to the mouse counterpart. The expressed B1 receptor in HEK293 cells displayed a rank order of affinity for the kinin peptides: des-Arg9-BK>Lys-des-Arg9-BK approximately des-Arg9, Leu8-BK>Sar-Tyr-epsilonAhx-Lys-[D-betaNal7, Ile8]-des-Arg9-BK>Sar-Tyr-epsilonAhx-Lys-des-Arg9-BK>>BK>> Hoe140. These results indicate that the cloned gene encodes a functional rat B1 receptor.
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