Linked Life Data

15304078

Source:http://linkedlifedata.com/resource/pubmed/id/15304078

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
2004-8-12
pubmed:abstractText
p0071 is an armadillo family protein related to both the adherens junction protein p120ctn and to the desmosomal proteins plakophilins 1-3. p0071 assembles into both adherens junctions and desmosomes, suggesting that this protein may regulate the balance between adherens junction and desmosome formation. Furthermore, this subfamily of proteins may also regulate cell functions directly influenced by intercellular junctions, including the strength of cell adhesion and the ability of cells to migrate. These possibilities were tested by expressing exogenous p0071 in A431 epithelial cells and monitoring the effects on adhesive junction assembly in comparison to other closely related armadillo family proteins. In this model system, p0071 specifically enhanced adherens junction assembly but dramatically compromised desmosome assembly, resulting in keratin filament retraction from regions of cell-cell contact. Protein interaction studies revealed that p0071 bound to the first 160 amino-terminal residues of desmoplakin and also interacted directly with plakoglobin, suggesting that p0071 may regulate desmosome assembly by controlling plakoglobin availability. Using an in vitro assay to measure the strength of cell-cell contacts, both plakophilin-1 and p120ctn were found to increase the strength of adhesion. Interestingly, p0071 expression caused no overall changes in adhesive strength, but dramatically inhibited the ability of A431 cells to close an in vitro wound. These results suggest that p120ctn/plakophilin family proteins interact with intercellular junction binding partners to differentially modulate the adhesive and migratory behavior of epithelial cells.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Sep
pubmed:issn
0022-202X
pubmed:author
pubmed:issnType
Print
pubmed:volume
123
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
426-33
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
2004
pubmed:articleTitle
Comparative analysis of armadillo family proteins in the regulation of a431 epithelial cell junction assembly, adhesion and migration.
pubmed:affiliation
Departments of Dermatology and Cell Biology, Emory University School of Medicine, 101 Woodruff Circle, Atlanta, GA 30322, USA.
pubmed:publicationType
Journal Article, Comparative Study, Research Support, U.S. Gov't, P.H.S.