Intron 17 of the human retinoblastoma susceptibility gene encodes an actively transcribed G protein-coupled receptor gene.
The human retinoblastoma susceptibility gene, a member of the tumor suppressor gene family, is located on chromosome 13q14.12-13q14.2 and consists of 27 exons that are distributed over 180 kb. This study shows that intron 17, the largest in size, consisting of nearly 72,000 bp, contains an open reading frame encoding a novel G protein-coupled receptor in the reverse orientation relative to the transcription of the retino-blastoma susceptibility gene. Correction of a frameshift mutation revealed that this novel G protein-coupled receptor is the human homolog of a chicken T-cell-specific receptor cDNA. This is an additional description of an actively transcribed protein-encoding gene positioned within an intron of another gene, suggesting that introns can have important structural functions.
Garvan Institute of Medical Research, St. Vincent's Hospital, Darlinghurst, Sydney, New South Wales, Australia. h.herzog@garvan.unsw.edu.au
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D000595:Amino Acid Sequence; D000818:Animals; D002645:Chickens; D002874:Chromosome Mapping; D002882:Chromosomes, Human, Pair 13; D004198:Disease Susceptibility; D005134:Eye Neoplasms / Q000235:genetics*; D016368:Frameshift Mutation; D006801:Humans; D007438:Introns; D008969:Molecular Sequence Data; D016366:Open Reading Frames; D011948:Receptors, Antigen, T-Cell / Q000235:genetics; D011956:Receptors, Cell Surface / Q000737:chemistry / Q000235:genetics*; D043562:Receptors, G-Protein-Coupled; D018048:Receptors, Purinergic P2; D012175:Retinoblastoma / Q000235:genetics*; D017386:Sequence Homology, Amino Acid; D049368:Receptors, Lysophosphatidic Acid
D011948:Receptors, Antigen, T-Cell; D011956:Receptors, Cell Surface; D043562:Receptors, G-Protein-Coupled; D018048:Receptors, Purinergic P2; C082320:LPAR4 protein, human; D049368:Receptors, Lysophosphatidic Acid