Characterization of a new disease-causing mutation of SH2D1A in a family with X-linked lymphoproliferative disease.

Melinda Erdõs, Eva Uzvölgyi, Zoltán Nemes, Olga Török, Eva Rákóczi, Nils Went-Sümegi, Janos Sumegi, László Maródi

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Males with an expressed mutation in the SH2D1A gene that encodes an SH2 domain protein named SH2D1A or SAP (NP_002342; signaling lymphocyte activating molecule [SLAM]-associated protein), have an X-linked syndrome characterized by an increased vulnerability to infection with Epstein-Barr virus (EBV). We evaluated two related male patients with fatal infectious mononucleosis (FIM) and mutation in the SH2D1A gene. Sequence analysis revealed a hemizygous c.47G>A mutation in one of the patients, and heterozygosity for this mutation in the genomic DNA from his mother and maternal grandmother. This mutation resulted in p.G16D amino acid change in the sequence of the SAP protein. To analyze the effect of this missense mutation on protein function cDNA was generated by site-directed mutagenesis and expressed in COS cells. We found that half-life of the p.G16D protein was comparable to that of wild type SAP. However, the mutant protein was defective in binding to its physiological ligands SLAM and 2B4. These results suggest that a defect in ligand binding contributes to the loss of function of the SAP protein in patients carrying p.G16D mutation.

Original languageEnglish (US)
Number of pages1
JournalHuman mutation
Volume25
Issue number5
StatePublished - Jan 1 2005

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Lymphoproliferative Disorders
Mutation
Proteins
Mothers
Lymphocytes
Ligands
Infectious Mononucleosis
Epstein-Barr Virus Infections
src Homology Domains
COS Cells
Missense Mutation
Mutant Proteins
Site-Directed Mutagenesis
Genes
Sequence Analysis
Half-Life
Complementary DNA
Amino Acids
DNA

ASJC Scopus subject areas

  • Genetics
  • Genetics(clinical)

Cite this

Erdõs, M., Uzvölgyi, E., Nemes, Z., Török, O., Rákóczi, E., Went-Sümegi, N., ... Maródi, L. (2005). Characterization of a new disease-causing mutation of SH2D1A in a family with X-linked lymphoproliferative disease. Human mutation, 25(5).

Characterization of a new disease-causing mutation of SH2D1A in a family with X-linked lymphoproliferative disease. / Erdõs, Melinda; Uzvölgyi, Eva; Nemes, Zoltán; Török, Olga; Rákóczi, Eva; Went-Sümegi, Nils; Sumegi, Janos; Maródi, László.

In: Human mutation, Vol. 25, No. 5, 01.01.2005.

Research output: Contribution to journalArticle

Erdõs, M, Uzvölgyi, E, Nemes, Z, Török, O, Rákóczi, E, Went-Sümegi, N, Sumegi, J & Maródi, L 2005, 'Characterization of a new disease-causing mutation of SH2D1A in a family with X-linked lymphoproliferative disease.', Human mutation, vol. 25, no. 5.
Erdõs M, Uzvölgyi E, Nemes Z, Török O, Rákóczi E, Went-Sümegi N et al. Characterization of a new disease-causing mutation of SH2D1A in a family with X-linked lymphoproliferative disease. Human mutation. 2005 Jan 1;25(5).
Erdõs, Melinda ; Uzvölgyi, Eva ; Nemes, Zoltán ; Török, Olga ; Rákóczi, Eva ; Went-Sümegi, Nils ; Sumegi, Janos ; Maródi, László. / Characterization of a new disease-causing mutation of SH2D1A in a family with X-linked lymphoproliferative disease. In: Human mutation. 2005 ; Vol. 25, No. 5.
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