Linked Life Data

8349687

Source:http://linkedlifedata.com/resource/pubmed/id/8349687

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
24
pubmed:dateCreated
1993-9-16
pubmed:abstractText
The extracellular domain (ECD) of the human interferon-gamma (IFN gamma) receptor was stably expressed in Chinese hamster ovary cells and purified to homogeneity. Scatchard analysis of 125I-IFN gamma binding to ECD preparations revealed the formation of a ligand-receptor complex which displayed a Ka of 6.4 +/- 0.9 x 10(8) M-1. Two types of complexes were identified by sucrose density gradient ultracentrifugation. The stoichiometry of the major ECD-ligand complex was determined by high performance liquid chromatography gel filtration. When IFN gamma was incubated with a 2-fold molar excess of ECD, a 190-kDa complex was isolated that contained 2 mol of ECD per 1 mol of IFN gamma. IFN gamma also induced dimerization of IFN gamma receptors expressed at the cell surface as detected by chemically cross-linking receptor bound ligand and analyzing cell lysates by SDS-polyacrylamide gel electrophoresis and immunoblotting. Finally, labeled forms of ECD bound to cells preincubated at 4 degrees C with excess amounts of IFN gamma indicating that the ligand could associate with more than one receptor molecule in the absence of chemical cross-linking agents. These results demonstrate that IFN gamma effects dimerization of its receptor under physiologic conditions and suggest that IFN gamma receptor dimerization may be an important event in inducing IFN gamma-dependent biologic responses.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Aug
pubmed:issn
0021-9258
pubmed:author
pubmed:issnType
Print
pubmed:day
25
pubmed:volume
268
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
18103-10
pubmed:dateRevised
2011-11-17
pubmed:meshHeading
pubmed:year
1993
pubmed:articleTitle
Interferon-gamma induces receptor dimerization in solution and on cells.
pubmed:affiliation
Department of Pathology, Washington University School of Medicine, St. Louis, Missouri 63110.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.