Linked Life Data

7782282

Source:http://linkedlifedata.com/resource/pubmed/id/7782282

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
24
pubmed:dateCreated
1995-7-17
pubmed:abstractText
Integrin alpha 4 beta 1 is a leukocyte receptor for fibronectin and vascular cell adhesion molecule-1 (VCAM-1). It is important in inflammatory recruitment of leukocytes, lymphopoiesis, and a number of development events. Here we have mapped a panel of functional monoclonal antibodies (mAbs) recognizing the integrin alpha 4 chain, using murine/human chimeric constructs expressed in COS7 cells. We find that: 1) mAbs that induce homotypic aggregation (epitope A mAbs) map to the most N-terminal 100 amino acids of the human alpha 4 chain; 2) mAbs that block adhesion of alpha 4 beta 1 to VCAM-1 and fibronectin (epitope B mAbs) map to a 52-amino-acid region between residues 152 and 203 of human alpha 4; 3) epitope B mAbs that do or do not induce aggregation (epitope B2 and B1 mAbs, respectively) map to the same regions and are therefore indistinguishable by this analysis; 4) mAbs that neither induce homotypic aggregation nor block adhesion (epitope C mAbs) map to a distinct region of the molecule comprising amino acids 422-606. The N-terminal region of the alpha 4 chain identified by functional A and B epitope mAbs does not correspond to ligand binding sites identified in other alpha subunits, such as cation binding sites or the "I-domain," which alpha 4 lacks, and thus represents a novel site for epitope functionality among the integrins.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jun
pubmed:issn
0021-9258
pubmed:author
pubmed:issnType
Print
pubmed:day
16
pubmed:volume
270
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
14270-3
pubmed:dateRevised
2011-11-17
pubmed:meshHeading
pubmed:year
1995
pubmed:articleTitle
Molecular mapping of functional antibody binding sites of alpha 4 integrin.
pubmed:affiliation
Biogen, Inc., Cambridge, Massachusetts 02142, USA.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.