The cloning and nucleotide sequence of human ST2L cDNA.
The ST2 gene is a member of the IL-1 receptor family and is hypothesized to be involved in helper T cell function, but its functional ligand and physiological role remain unknown. We have cloned the human ST2L cDNA that encodes a distinct type of membrane-bound ST2 protein. The predicted 556-amino-acid sequence showed 67% identity to the mouse ST2L protein. The human ST2 gene (IL1RL1) contains 13 exons and spans 40 kb in length. Its exon-intron organization was elucidated from a registered human genomic sequence derived from chromosome 2q, which contains three other genes belonging to the IL-1 receptor family in an approximately 202-kb genomic region. The tissue distribution of ST2 expression was examined by RT-PCR, and the soluble form (ST2, IL1RL1-a) and ST2L (IL1RL1-b) appear to be expressed differentially. We also established stable transfectants of a human glioblastoma cell line, T98G, that express human ST2L constitutively, and we confirmed cell-surface expression of human ST2L protein on the transfectants.[1]References
- The cloning and nucleotide sequence of human ST2L cDNA. Li, H., Tago, K., Io, K., Kuroiwa, K., Arai, T., Iwahana, H., Tominaga, S., Yanagisawa, K. Genomics (2000) [Pubmed]
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