Publication Date:
1989-11-17
Description:
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.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Agre, P -- Johnson, P F -- McKnight, S L -- New York, N.Y. -- Science. 1989 Nov 17;246(4932):922-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Research Laboratories, Department of Embryology, Carnegie Institution of Washington, Baltimore, MD 21210.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2530632" target="_blank"〉PubMed〈/a〉
Keywords:
Amino Acid Sequence
;
Base Sequence
;
CCAAT-Enhancer-Binding Proteins
;
DNA/*metabolism
;
DNA-Binding Proteins/genetics/*metabolism
;
Deoxyribonuclease I
;
Escherichia coli/genetics
;
Fungal Proteins/genetics/*metabolism
;
Genes, Fungal
;
Genes, Regulator
;
Molecular Sequence Data
;
Neurospora crassa/genetics
;
Nuclear Proteins/genetics/*metabolism
;
Nucleotide Mapping
;
*Protein Kinases
;
*Saccharomyces cerevisiae Proteins
;
Transcription Factors/genetics/*metabolism
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
Permalink