Linked Life Data

9660814

Source:http://linkedlifedata.com/resource/pubmed/id/9660814

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
29
pubmed:dateCreated
1998-8-13
pubmed:abstractText
EBP50 (ezrin-radixin-moesin-binding phosphoprotein 50) was recently identified by affinity chromatography on the immobilized NH2-terminal domain of ezrin. Here we map and characterize the regions in EBP50 and ezrin necessary for this association. Using blot overlays and in solution binding assays, the COOH-terminal 30 residues of EBP50 were found to be sufficient for an association with residues 1-286 of ezrin. EBP50 did not bind to full-length (1-585) ezrin, indicating that the EBP50 binding site is masked in the full-length molecule. Ezrin contains two complementary self-association domains known as N- and C-ERMADs (ezrin-radixin-moesin-association domains), encompassing residues 1-296 and 479-585, respectively. An ezrin 1-583 construct lacking the two terminal residues necessary for this association was found to have an unmasked EBP50 binding site. Moreover, binding of EBP50 and the C-ERMAD to ezrin residues 1-296 was found to be mutually exclusive, with the C-ERMAD having a higher affinity. These results suggest that in full-length ezrin, the binding site for EBP50 is masked through an intramolecular N/C-ERMAD association. Based on these and additional results, we propose a model whereby dormant ezrin can be activated to bind EBP50 on its NH2-terminal end and F-actin on its COOH-terminal end. Since EBP50 is proposed to bind membrane proteins through its PDZ domains, this provides a molecular description of the regulated linkage of microfilaments to membranes in cell surface microvilli.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jul
pubmed:issn
0021-9258
pubmed:author
pubmed:issnType
Print
pubmed:day
17
pubmed:volume
273
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
18452-8
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1998
pubmed:articleTitle
The carboxyl-terminal region of EBP50 binds to a site in the amino-terminal domain of ezrin that is masked in the dormant molecule.
pubmed:affiliation
Section of Biochemistry, Molecular and Cell Biology, Cornell University, Ithaca, New York 14853, USA.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.