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Linking DNA-binding proteins to their recognition sequences by using protein microarrays.

Su-Wen Ho¹, Ghil Jona, Christina T L Chen

¹Washington University School of Medicine, 4444 Forest Park Boulevard, St. Louis, MO 63108, USA.

Proceedings of the National Academy of Sciences of the United States of America

|June 21, 2006

Summary

Researchers used protein arrays to identify DNA-binding proteins and their targets. This high-throughput method revealed a previously uncharacterized protein, Yjl103, involved in stress response and oxidative phosphorylation.

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Area of Science:

Genomics
Molecular Biology
Biochemistry

Background:

Conserved DNA sequence motifs across species suggest functional importance.
Current methods are insufficient for large-scale functional exploration of these motifs.

Purpose of the Study:

To develop and apply a high-throughput method for identifying DNA-protein interactions.
To explore the function of evolutionarily conserved DNA sequence elements.

Main Methods:

Construction of a protein microarray containing 282 yeast transcription factors.
Probing the microarray with evolutionarily conserved DNA sequences.
Characterization of identified DNA-binding proteins and their target genes.

Main Results:

Identified specific transcription factors that bind to conserved DNA sequences.
Characterized a novel DNA-binding protein, Yjl103.
Determined the binding site and target genes for Yjl103, including those related to stress response and oxidative phosphorylation.

Conclusions:

Protein microarrays provide a scalable, high-throughput approach for discovering DNA-protein interactions.
This method facilitates the functional characterization of conserved DNA elements and their associated proteins.