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A Peptide Motif That Recognizes A.T Tracts in DNA

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Specialty Science
Date 1993 Dec 1
PMID 8248247
Citations 11
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Abstract

The DAT1 gene of Saccharomyces cerevisiae encodes a DNA binding protein that specifically interacts with nonalternating oligo(A).oligo(T) tracts (A.T tracts). Deletion analysis of DAT1 coding information showed that the amino-terminal 36 residues are sufficient for specific DNA binding activity. Furthermore, a 35-residue synthetic peptide corresponding to amino acids 2-36 bound to A.T tracts with an equilibrium dissociation constant of 4 x 10(-10) M. Within this region the pentad Gly-Arg-Lys-Pro-Gly is repeated three times. Mutational analysis revealed that the Arg side chains are required for high-affinity binding, whereas the other pentad side chains are dispensable. Chemical interference experiments showed that the DAT1 protein interacts with the minor groove of the double helix. The data suggest that the pentad arginines interact in a cooperative manner with a repeated minor groove feature of A.T tract DNA to achieve high-affinity recognition. Amino acid similarities with other DNA binding proteins suggest that the DAT1 protein pentad represents a specialized example of a widespread motif used by proteins to recognize A.T base pairs.

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References
1.
Lue N, Buchman A, Kornberg R . Activation of yeast RNA polymerase II transcription by a thymidine-rich upstream element in vitro. Proc Natl Acad Sci U S A. 1989; 86(2):486-90. PMC: 286495. DOI: 10.1073/pnas.86.2.486. View

2.
Coll M, Frederick C, Wang A, Rich A . A bifurcated hydrogen-bonded conformation in the d(A.T) base pairs of the DNA dodecamer d(CGCAAATTTGCG) and its complex with distamycin. Proc Natl Acad Sci U S A. 1987; 84(23):8385-9. PMC: 299547. DOI: 10.1073/pnas.84.23.8385. View

3.
Seeman N, Rosenberg J, Rich A . Sequence-specific recognition of double helical nucleic acids by proteins. Proc Natl Acad Sci U S A. 1976; 73(3):804-8. PMC: 336007. DOI: 10.1073/pnas.73.3.804. View

4.
Ashley C, Pendleton C, Jennings W, Saxena A, Glover C . Isolation and sequencing of cDNA clones encoding Drosophila chromosomal protein D1. A repeating motif in proteins which recognize at DNA. J Biol Chem. 1989; 264(14):8394-401. View

5.
NELSON H, Finch J, Luisi B, Klug A . The structure of an oligo(dA).oligo(dT) tract and its biological implications. Nature. 1987; 330(6145):221-6. DOI: 10.1038/330221a0. View