Splice acceptor site mutation of the transporter associated with antigen processing-1 gene in human bare lymphocyte syndrome.

نویسندگان

  • H Furukawa
  • S Murata
  • T Yabe
  • N Shimbara
  • N Keicho
  • K Kashiwase
  • K Watanabe
  • Y Ishikawa
  • T Akaza
  • K Tadokoro
  • S Tohma
  • T Inoue
  • K Tokunaga
  • K Yamamoto
  • K Tanaka
  • T Juji
چکیده

Expression of histocompatibility leukocyte antigen (HLA) class I molecules on the cell surface depends on the heterodimer of the transporter associated with antigen processing 1 and 2 (TAP1 and TAP2), which transport peptides cleaved by proteasome to the class I molecules. Defects in the TAP2 protein have been reported in two families with HLA class I deficiency, the so-called bare lymphocyte syndrome (BLS) type I. We have, to our knowledge, identified for the first time a splice site mutation in the TAP1 gene of another BLS patient. In addition, class I heavy chains (HCs) did not form the normal complex with tapasin in the endoplasmic reticulum (ER) of the cells of our patient.

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Brief report A subject with a novel type I bare lymphocyte syndrome has tapasin deficiency due to deletion of 4 exons by Alu-mediated recombination

HLA class I expression depends on the formation of a peptide-loading complex composed of class I heavy chain; 2microglobulin; the transporter associated with antigen processing (TAP); and tapasin, which links TAP to the heavy chain. Defects in TAP result in a class I deficiency called the type I bare lymphocyte syndrome (BLS). In the present study, we examined a subject with a novel type I BLS ...

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عنوان ژورنال:
  • The Journal of clinical investigation

دوره 103 5  شماره 

صفحات  -

تاریخ انتشار 1999