title: Cloning and nucleotide sequence of the murine interleukin-3 gene.
abstract: Southern hybridization analysis using a probe derived from a murine interleukin-3 (IL-3) cDNA clone revealed the presence of a single IL-3 gene in the haploid murine genome. An 8600-base-pair (8.6-kb) murine genomic EcoRI fragment containing the IL-3 gene was isolated by screening a library of size-fractionated genomic EcoRI fragments cloned in lambda gtWES X lambda B. The nucleotide sequence of a 3.5-kb region of the cloned DNA encompassing the IL-3 gene was determined. The gene contains four introns of 96, 993, 135 and 122 base pairs (bp), located within the coding region. The large intron contains 12 copies of a 14-15-bp tandem repeating sequence which resembles a human cellular homologue of a BKV enhancer sequence. The nucleotide sequence of the exons agrees exactly with that of an IL-3 cDNA cloned from WEHI-3, a tumorigenic cell line which over-produces IL-3, establishing that the unprocessed primary structure of IL-3 is identical in WEHI-3 and in BALB/c mice. Southern hybridization has revealed genomic alteration in the vicinity of the IL-3 gene in WEHI-3 cells.
mesh_terms: D000818:Animals; D001483:Base Sequence; D003001:Cloning, Molecular; D004247:DNA / Q000032:analysis*; D007377:Interleukin-3; D008222:Lymphokines / Q000235:genetics*; D051379:Mice; D008807:Mice, Inbred BALB C; D009693:Nucleic Acid Hybridization; D011061:Poly A / Q000378:metabolism; D012333:RNA, Messenger / Q000032:analysis; D014158:Transcription, Genetic
chemical_list: D007377:Interleukin-3; D008222:Lymphokines; D012333:RNA, Messenger; D011061:Poly A; D004247:DNA