Alternative mRNA splicing creates transcripts encoding soluble proteins from most LILR genes

Des C Jones, Ali Roghanian, Damien P Brown, Chiwen Chang, Rachel L Allen, John Trowsdale, Neil T Young

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Leucocyte Ig-like receptors (LILR) are a family of innate immune receptors expressed on myeloid and lymphoid cells that influence adaptive immune responses. We identified a common mechanism of alternative mRNA splicing, which generates transcripts that encode soluble protein isoforms of the majority of human LILR. These alternative splice variants lack transmembrane and cytoplasmic encoding regions, due to the transcription of a cryptic stop codon present in an intron 5' of the transmembrane encoding exon. The alternative LILR transcripts were detected in cell types that express their membrane-associated isoforms. Expression of the alternative LILRB1 transcript in transfected cells resulted in the release of a soluble ~65¿Kd LILRB1 protein into culture supernatants. Soluble LILRB1 protein was also detected in the culture supernatants of monocyte-derived DC. In vitro assays suggested that soluble LILRB1 could block the interaction between membrane-associated LILRB1 and HLA-class I. Soluble LILRB1 may act as a dominant negative regulator of HLA-class I-mediated LILRB1 inhibition. Soluble isoforms of the other LILR may function in a comparable way.
Original languageEnglish
Pages (from-to)3195-3206
Number of pages12
JournalEuropean Journal of Immunology
Volume39
Issue number11
Early online date5 Aug 2009
DOIs
Publication statusPublished - Nov 2009

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Alternative Splicing
Leukocytes
Messenger RNA
Protein Isoforms
Genes
Proteins
Membranes
Terminator Codon
Adaptive Immunity
Myeloid Cells
Introns
Monocytes
Exons
Lymphocytes

Keywords

  • alternative splicing
  • leucocyte Ig-like receptor
  • Ig-like transcript
  • secreted
  • soluble

Cite this

Jones, D. C., Roghanian, A., Brown, D. P., Chang, C., Allen, R. L., Trowsdale, J., & Young, N. T. (2009). Alternative mRNA splicing creates transcripts encoding soluble proteins from most LILR genes. European Journal of Immunology, 39(11), 3195-3206. https://doi.org/10.1002/eji.200839080

Alternative mRNA splicing creates transcripts encoding soluble proteins from most LILR genes. / Jones, Des C; Roghanian, Ali; Brown, Damien P; Chang, Chiwen; Allen, Rachel L; Trowsdale, John; Young, Neil T.

In: European Journal of Immunology, Vol. 39, No. 11, 11.2009, p. 3195-3206.

Research output: Contribution to journalArticle

Jones, DC, Roghanian, A, Brown, DP, Chang, C, Allen, RL, Trowsdale, J & Young, NT 2009, 'Alternative mRNA splicing creates transcripts encoding soluble proteins from most LILR genes', European Journal of Immunology, vol. 39, no. 11, pp. 3195-3206. https://doi.org/10.1002/eji.200839080
Jones, Des C ; Roghanian, Ali ; Brown, Damien P ; Chang, Chiwen ; Allen, Rachel L ; Trowsdale, John ; Young, Neil T. / Alternative mRNA splicing creates transcripts encoding soluble proteins from most LILR genes. In: European Journal of Immunology. 2009 ; Vol. 39, No. 11. pp. 3195-3206.
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