Cloning and characterization of TRAIL-R3, a novel member of the emerging TRAIL receptor family

Mariapia A. Degli-Esposti, Pamela J. Smolak, Henning Walczak, Jennifer Waugh, Chang Pin Huang, Robert F. DuBose, Raymond G. Goodwin, Craig A. Smith

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TRAIL-R3, a new member of the TRAIL receptor family, has been cloned and characterized. TRAIL-R3 encodes a 299 amino acid protein with 58 and 54% overall identity to TRAIL-R1 and -R2, respectively. Transient expression and quantitative binding studies show TRAIL-R3 to be a plasma membrane-bound protein capable of high affinity interaction with the TRAIL ligand. The TRAIL-R3 gene maps to human chromosome 8p22-21, clustered with the genes encoding two other TRAIL receptors. In contrast to TRAIL-R1 and -R2, this receptor shows restricted expression, with transcripts detectable only in peripheral blood lymphocytes and spleen. The structure of TRAIL-R3 is unique when compared to the other TRAIL receptors in that it lacks a cytoplasmic domain and appears to be glycosyl-phosphatidylinositol-linked. Moreover, unlike TRAIL-R1 and -R2, in a transient overexpression system TRAIL-R3 does not induce apoptosis.

Original languageEnglish
Pages (from-to)1165-1170
Number of pages6
JournalJournal of Experimental Medicine
Issue number7
Publication statusPublished - 6 Oct 1997
Externally publishedYes

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