Linked Life Data

8251489

Source:http://linkedlifedata.com/resource/pubmed/id/8251489

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
47
pubmed:dateCreated
1994-1-10
pubmed:abstractText
The leukocyte cell surface glycoprotein CD45 is a protein tyrosine phosphatase and is involved in signal transduction mediated by the T cell antigen receptor. The asparagine-linked sugar chains were released as oligosaccharides from purified CD45 by hydrazinolysis. Approximately 6 mol of sugar chains was released from 1 mol of CD45. These sugar chains were converted to radioactive oligosaccharides by reduction with NaB3H4 and separated into neutral and acidic fractions by paper electrophoresis. All of the acidic oligosaccharides were converted to neutral ones by digestion with sialidase, indicating that they are sialyl derivatives. Binding of the sialylated oligosaccharides to an SNA-agarose column as well as methylation analysis revealed that the oligosaccharides have only alpha-2,6-linked sialic acid residues. The neutral and sialidase-treated acidic oligosaccharides were fractionated by serial lectin column chromatography followed by Bio-Gel P-4 column chromatography. Structural studies of each oligosaccharide by sequential exo- and endoglycosidase digestion and by methylation analysis revealed that CD45 contains mainly bi-, tri-, and tetraantennary complex-type sugar chains. About 46% of the tetraantennary complex-type sugar chains had the poly(N-acetyllactosamine) groups and 18% of the 2,4-branched triantennary complex-type sugar chains had the fucosyl N-acetyllactosamine group. A portion of the bi- and 2,4-branched triantennary complex-type sugar chains were bisected. In addition to these sugar chains, a small amount of high mannose-type and hybrid-type sugar chains were detected.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Nov
pubmed:issn
0006-2960
pubmed:author
pubmed:issnType
Print
pubmed:day
30
pubmed:volume
32
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
12694-704
pubmed:dateRevised
2007-11-15
pubmed:meshHeading
pubmed:year
1993
pubmed:articleTitle
Structural study of the sugar chains of human leukocyte common antigen CD45.
pubmed:affiliation
Department of Biochemistry, University of Tokyo, Japan.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't