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PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
11
pubmed:dateCreated
1997-6-17
pubmed:abstractText
Lutheran glycoprotein (Lu gp) has five predicted immunoglobulin superfamily (IgSF) domains. K562 cells were transfected with Lu cDNA and tested by flow cytometry with monoclonal antibodies and Lu blood group antisera. The results confirmed the identity of Lu cDNA. Deletion mutants lacking the regions encoding one or more IgSF domains were made by inverse polymerase chain reaction (PCR), expressed in K562 cells, and tested with the same antibodies. The Lu(b) and Lu5 antigens and the epitope recognized by monoclonal antibody BRIC 224 were mapped to the first, N-terminal, IgSF domain. Lu4 and Lu8 were mapped to domain 2; Lu20 to domain 3; Lu7 and BRIC 221 epitope to domain 4, and Lu13 and Au(b) to domain 5. The organization of the LU gene was determined. The region encoding the open reading frame is arranged in 15 exons extending over approximately 11 kb on chromosome 19q13.2. The Lu(a)/Lu(b) and Au(a)/Au(b) blood group polymorphisms were studied using genomic DNA from typed blood donors. The Lu(a) mutation is a base change in exon 3 (G252 to A) encoding an Arg77 (Lu(b)) to His (Lu(a)) change on the CFG face of domain 1. The Au(a)/Au(b) polymorphism is an A1637 to G substitution in exon 12 encoding a Thr539 (Au(a)) to Ala (Au(b)) change on the G strand of domain 5.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
AIM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jun
pubmed:issn
0006-4971
pubmed:author
pubmed:issnType
Print
pubmed:day
1
pubmed:volume
89
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
4219-25
pubmed:dateRevised
2004-11-17
pubmed:meshHeading
pubmed:year
1997
pubmed:articleTitle
Use of domain-deletion mutants to locate Lutheran blood group antigens to each of the five immunoglobulin superfamily domains of the Lutheran glycoprotein: elucidation of the molecular basis of the Lu(a)/Lu(b) and the Au(a)/Au(b) polymorphisms.
pubmed:affiliation
International Blood Group Reference Laboratory, Bristol Institute for Transfusion Sciences, UK.
pubmed:publicationType
Journal Article