Abstract
Both C/EBP and GCN4 are sequence-specific DNA binding proteins that control gene expression. Recent evidence implicates C/EBP as a transcriptional regulator of genes involved in lipid and carbohydrate metabolism. The C/EBP protein binds avidly to the dyad symmetric sequence 5′-ATTGCGCAAT-3′; GCN4 regulates the transcription of genes that control amino acid biosynthesis in yeast, and binds avidly to the dyad symmetric sequence 5′-ATGA(G/C)TCAT-3′. Both C/EBP and GCN4 bind DNA via the same structural motif. This motif has been predicted to be bipartite, consisting of a dimerization interface termed the "leucine zipper" and a DNA contact surface termed the "basic region." Specificity of DNA binding has been predicted to be imparted by the basic region. As a test of this hypothesis, recombinant proteins were created wherein the basic regions and leucine zippers of GCN4 and C/EBP were reciprocally exchanged. In both of the recombinant polypeptides, DNA binding specificity is shown to track with the basic region.
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Dates
Type | When |
---|---|
Created | 18 years, 10 months ago (Oct. 5, 2006, 5:21 p.m.) |
Deposited | 1 year, 7 months ago (Jan. 12, 2024, 9:49 a.m.) |
Indexed | 3 months, 2 weeks ago (May 19, 2025, 4:23 p.m.) |
Issued | 35 years, 9 months ago (Nov. 17, 1989) |
Published | 35 years, 9 months ago (Nov. 17, 1989) |
Published Print | 35 years, 9 months ago (Nov. 17, 1989) |
@article{Agre_1989, title={Cognate DNA Binding Specificity Retained After Leucine Zipper Exchange Between GCN4 and C/EBP}, volume={246}, ISSN={1095-9203}, url={http://dx.doi.org/10.1126/science.2530632}, DOI={10.1126/science.2530632}, number={4932}, journal={Science}, publisher={American Association for the Advancement of Science (AAAS)}, author={Agre, Peter and Johnson, Peter F. and McKnight, Steven L.}, year={1989}, month=nov, pages={922–926} }