Cloning of a human platelet-activating factor receptor gene: evidence for an intron in the 5'-untranslated region.
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Chase PB, Halonen M, Regan JW
Cloning of a human platelet-activating factor receptor gene: evidence for an intron in the 5'-untranslated region.
Am J Respir Cell Mol Biol. 1993 Mar;8(3):240-4.
- PubMed ID
- 8383507 [ View in PubMed]
- Abstract
A clone encoding a gene for a human platelet-activating factor (PAF) receptor has been isolated from a human genomic library. A 6-kb Hind III fragment was subcloned and was found to contain a full coding sequence identical with that previously reported for cDNA clones encoding PAF receptors from leukocyte cDNA libraries. Sequencing of the 6-kb Hind III fragment upstream from the start codon revealed that the 5'-untranslated region deviated from reported cDNA sequences beginning at base -39, suggesting the presence of an intron in this region. Consensus sequences for a splice junction appear appropriately located at the predicted 3' end of the purported intron. Restriction map analysis of the region revealed that the size of the intron in the 5'-untranslated region was at least 16 kb. These data indicate that a gene for a human PAF receptor is present in the genome without introns in the coding sequence and that splicing of mRNA encoding PAF receptors appears to occur in the 5'-untranslated region.