Isolation of a library of target-sites for sequence specific DNA binding proteins from chick embryonic heart: a potential tool for identifying novel transcriptional regulators involved in embryonic development

Biochemical and Biophysical Research Communications
K V SindhuShyamal K Goswami

Abstract

Enormity of the metazoan genomes and divergence in their regulation impose a serious constraint on the comprehensive understanding of context specific gene regulation. DNA elements located in the promoter, enhancer, and other regulatory regions of the genome dictate the temporal and spatial patterns of gene activities. However, owing to the diminutive and variable nature of the regulatory DNA elements, their identification and location remains a major challenge. We have developed an efficient strategy for isolating a repertoire of target sites for sequence specific DNA binding proteins from embryonic chick heart. A comprehensive library of such sequences was constructed and authenticated using various parameters including in silico determination of functional binding sites. This approach, therefore, for the first time, established an experimental and conceptual framework for defining the entire repertoire of functional DNA elements in any cellular context.

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