Linked Life Data

8341266

Source:http://linkedlifedata.com/resource/pubmed/id/8341266

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1993-8-27
pubmed:abstractText
A 2046-base pair cDNA clone, homologous to mammalian angiotensin (AT) AT1 receptors, was isolated from a library prepared from adrenal glands of the domestic turkey (Meleagris gallopavo). Sequence analysis of the cDNA insert in clone pTAT2' reveals a 1077-base pair open reading frame predicting a 359-amino acid protein approximately 75% homologous to mammalian AT1 receptors. Saturation radioligand binding studies performed in membranes of COS-7 cells transfected with pTAT2' show high affinity specific binding of 125I-angiotensin II, with a Kd of 172 pM. The rank order of affinities for a series of ligands determined by competition binding studies is angiotensin II > or = [Sar1,Ile8]-angiotensin II > angiotensin III approximately [Sar1,Ala8]-angiotensin II approximately CGP42112A > angiotensin I > Dup753 > PD123177. This rank order of affinity series differs substantially from that for mammalian AT1 receptors and AT2 binding sites. Angiotensin II (100 nM) can stimulate inositol phosphate production similarly in COS-7 cells transfected with pTAT2' and in COS-7 cells transfected with the AT1a receptor cDNA pCa18b. This response in pTAT2'-transfected cells is not attenuated in the presence of 30 microM Dup753. In contrast, this concentration of antagonist attenuates > 90% of the inositol phosphate response to angiotensin II in COS-7 cells transfected with the rat AT1a receptor cDNA. These results demonstrate an avian structural homologue of mammalian AT1 receptors possessing distinct pharmacological properties with both peptide and nonpeptide AT receptor ligands.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jul
pubmed:issn
0026-895X
pubmed:author
pubmed:issnType
Print
pubmed:volume
44
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1-7
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1993
pubmed:articleTitle
A cloned angiotensin receptor isoform from the turkey adrenal gland is pharmacologically distinct from mammalian angiotensin receptors.
pubmed:affiliation
Department of Medicine, Emory University School of Medicine, Atlanta, Georgia 30322.
pubmed:publicationType
Journal Article, Comparative Study, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't