RGD Reference Report - Expression cloning of a rat B2 bradykinin receptor. - Rat Genome Database

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Expression cloning of a rat B2 bradykinin receptor.

Authors: McEachern, AE  Shelton, ER  Bhakta, S  Obernolte, R  Bach, C  Zuppan, P  Fujisaki, J  Aldrich, RW  Jarnagin, K 
Citation: McEachern AE, etal., Proc Natl Acad Sci U S A 1991 Sep 1;88(17):7724-8.
RGD ID: 631709
Pubmed: PMID:1715575   (View Abstract at PubMed)
PMCID: PMC52375   (View Article at PubMed Central)

A cDNA encoding a functional bradykinin receptor was isolated from a rat uterus library by a clonal selection strategy using Xenopus laevis oocytes to assay for expression of bradykinin responses. The predicted protein is homologous to the seven transmembrane G protein-coupled superfamily of receptors. Bradykinin and its analogs stimulate a Cl- current oocytes expressing the receptor with the rank order of potency: bradykinin approximately Lys-bradykinin greater than [Tyr8]-bradykinin much greater than [Phe6]bradykinin. This is the rank order of potency observed for these compounds in competitive binding assays on soluble receptor from rat uterus. Des-Arg9-bradykinin (10 microM) elicits no response when applied to oocytes expressing the receptor; thus, the cDNA encodes a B2 type bradykinin receptor. [Thi5,8,DPhe7]bradykinin, where Thi is beta-(2-thienyl)-alanine, is a very weak partial agonist and inhibits the bradykinin-mediated ion flux, suggesting the cDNA encodes a smooth muscle, rather than a neuronal, B2 receptor subtype. Receptor message has a distribution consistent with previous reports of bradykinin function and/or binding in several tissues and is found in rat uterus, vas deferens, kidney, lung, heart, ileum, testis, and brain. Receptor subtypes are a possibility because several tissues contain two or three message species (4.0, 5.7, and 6.5 kilobases). Southern blot high-stringency analysis demonstrated that the rat, guinea pig, and human genomes contain a single gene. As bradykinin is a key mediator of pain, knowledge of the primary structure of this receptor will allow a molecular understanding of the receptor and aid the design of antagonists for pain relief.



Gene Ontology Annotations    Click to see Annotation Detail View

Molecular Function

  
Object SymbolSpeciesTermQualifierEvidenceWithNotesSourceOriginal Reference(s)
Bdkrb2Ratbradykinin receptor activity  IDA  RGD 

Objects Annotated

Genes (Rattus norvegicus)
Bdkrb2  (bradykinin receptor B2)


Additional Information