Proteins containing bromodomains are small helical interaction modules, capable of binding to acetylated histone tails and have a role in recognizing acetylated chromatin. Histone tails acetylation is commonly an indicative mark of open chromatin architecture and transcriptional activation. Bromodomain is present in diverse eukaryotic species. They have a conserved 120 residue structural four helix motif. In Arabidopsis mutantion of bromodomain linked it with seed germinationas as well as for establishment of leaf shape.
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