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• W1902318549 endingPage "6305" @default.
• W1902318549 startingPage "6296" @default.
• W1902318549 abstract "DNA elements with the CC(A/T)6GG, or CArG, motif occur in promoters that are under different regulatory controls. CArG elements from the skeletal actin, c-fos, and myogenin genes were tested for their abilities to confer tissue-specific expression on reporter genes when the individual elements were situated immediately upstream from a TATA element. The c-fos CArG element, also referred to as the serum response element (SRE), conferred basal, constitutive expression on the test promoter. The CArG motif from the myogenin gene was inactive. The skeletal actin CArG motif functioned as a muscle regulatory element (MRE) in that basal expression was detected only in muscle cultures. Muscle-specific expression from the 28-bp MRE and the 2.3-kb skeletal actin promoter was trans repressed by the Fos and Jun proteins. The expression and factor-binding properties of a series of synthetic CArG elements were analyzed. Muscle-specific expression was conferred by perfect 28-bp palindromes on the left and right halves of the skeletal actin MRE. Chimeric elements of the skeletal actin MRE and the c-fos SRE differed in their expression properties. Muscle-specific expression was observed when the left half of the MRE was fused to the right half of the SRE. Constitutive expression was conferred by a chimera with the right half of the MRE fused to the left half of the SRE and by chimeras which exchanged the central CC(A/T)6GG sequences. At least three distinct proteins specifically bound to these CArG elements. The natural and synthetic CArG elements differed in their affinities for these proteins; however, muscle-specific expression could not be attributed to differences in the binding of a single protein. Furthermore, the MRE did not bind MyoD or the myogenin-E12 heterodimer, indicating that muscle-specific expression from this element does not involve a direct interaction with these helix-loop-helix proteins. These data demonstrate that the conserved CArG motifs form the core of a family of functionally different DNA regulatory elements that may contribute to the tissue-specific expression properties of their cognate promoters." @default.
• W1902318549 created "2016-06-24" @default.
• W1902318549 creator A5025064065 @default.
• W1902318549 creator A5060967318 @default.
• W1902318549 date "1991-12-01" @default.
• W1902318549 modified "2023-10-14" @default.
• W1902318549 title "Natural and synthetic DNA elements with the CArG motif differ in expression and protein-binding properties." @default.
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• W1902318549 doi "https://doi.org/10.1128/mcb.11.12.6296" @default.
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