Title: Genome-wide DNA-binding specificity of PIL5, an Arabidopsis basic Helix-Loop-Helix (bHLH) transcription factor

Authors: Hyojin Kang, Eunkyoo Oh, Giltsu Choi, Doheon Lee

Addresses: Department of Bio and Brain Engineering, KAIST, Daejeon 305-701, Korea. ' Department of Biological Sciences, KAIST, Daejeon 305-701, Korea. ' Department of Biological Sciences, KAIST, Daejeon 305-701, Korea. ' Department of Bio and Brain Engineering, KAIST, Daejeon 305-701, Korea

Abstract: PIL5 is a member of the basic Helix-Loop-Helix (bHLH) transcription factor superfamily. We previously showed that PIL5 binds to the G-box (CACGTG) motif with high affinity. However, since there are many randomly matched G-box motifs throughout the genome, other factors must account for the in-vivo PIL5 binding specificity. In this study, we investigated if in-vivo PIL5 binding sites can be explained by any other attributes extracted from various sources. Our results showed that PIL5 binding sites can be explained by attributes such as neighbouring motif composition, nucleosome density, DNA methylation and distance from transcription start site in addition to G-box.

Keywords: bHLH; basic helix-loop-helix; phytochrome interacting factor 3-LIKE5; PIL5; g-box motifs; ChIP-chip; DNA binding specificity; Arabidopsis; transcription factors; bioinformatics; neighbouring motif composition; nucleosome density; DNA methylation.

DOI: 10.1504/IJDMB.2010.035902

International Journal of Data Mining and Bioinformatics, 2010 Vol.4 No.5, pp.588 - 599

Published online: 08 Oct 2010 *

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