An 11-base-pair DNA Sequence Motif Apparently Unique to the Human Interleukin 4 Gene Confers Responsiveness to T-cell Activation Signals
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We have identified a DNA segment that confers responsiveness to antigen stimulation signals on the human interleukin (IL) 4 gene in Jurkat cells. The human IL-4 gene, of 10 kilobases, is composed of four exons and three introns. A cis-acting element (P sequence) resides in the 5' upstream region; no additional DNA segments with enhancer activity were identified in the human IL-4 gene. For further mapping purposes, a fusion promoter was constructed with the granulocyte/macrophage colony-stimulating factor basic promoter containing 60 base pairs of sequence upstream from the cap site of the mouse granulocyte/macrophage colony-stimulating factor gene and various lengths of the 5' upstream sequence of the IL-4 gene. The P sequence was located between positions -79 and -69 relative to the transcription start site of the human IL-4 gene, and this location was confirmed by base-substitution mutations. The plasmids carrying multiple copies of the P sequence showed higher responsiveness to the stimulation. The binding protein(s) that recognize the P sequence of the IL-4 gene were identified by DNA-mobility-shift assays. The binding of NF(P) (a DNA binding protein that specifically recognizes the P sequence) to the P sequence was abolished when oligonucleotides carrying base substitutions were used, indicating that the NF(P) interaction is sequence-specific and that binding specificity of the protein paralleled the sequence requirements for IL-4 expression in vivo. The P sequence does not share homology with the 5' upstream sequence of the IL-2 gene, even though surrounding sequences of the IL-4 gene share high homology with the IL-2 gene. We conclude that a different set of proteins recognize IL-2 and IL-4 genes.
Lohoff M, Giaisi M, Kohler R, Casper B, Krammer P, Li-Weber M J Biol Chem. 2009; 285(3):1643-52.
PMID: 19915002 PMC: 2804322. DOI: 10.1074/jbc.M109.011585.
Regulation of IL-4 expression by the transcription factor JunB during T helper cell differentiation.
Li B, Tournier C, Davis R, Flavell R EMBO J. 1999; 18(2):420-32.
PMID: 9889198 PMC: 1171136. DOI: 10.1093/emboj/18.2.420.
Evidence that calcineurin is rate-limiting for primary human lymphocyte activation.
Batiuk T, Kung L, Halloran P J Clin Invest. 1997; 100(7):1894-901.
PMID: 9312192 PMC: 508377. DOI: 10.1172/JCI119719.
Liu J, Amasaki Y, Ikeuchi T, Imai S, Takano T, Arai N Mol Biol Cell. 1997; 8(1):157-70.
PMID: 9017603 PMC: 276067. DOI: 10.1091/mbc.8.1.157.
Investigation of an interleukin-4 promoter polymorphism for associations with asthma and atopy.
Walley A, Cookson W J Med Genet. 1996; 33(8):689-92.
PMID: 8863163 PMC: 1050705. DOI: 10.1136/jmg.33.8.689.