Palindromes and Promoters: The Importance of Palindromes in DNA Sequence

Overview

A palindrome is a word or phrase that can be read the same forward and backward. Similarly, palindromic sequences in DNA can be read the same from the 5’ to 3’ end on one strand as on the reverse complement strand (Smith, 2008). These sequences frequently occur near transcription factor binding sites (Qian et al., 2006), and this study aimed to determine whether they also occurred more often near promoters, enhancers, and other key regions of the genome. I deployed an algorithm on the genome of C. elegans to calculate the overall palindrome richness throughout the genome and identify extremely palindrome-dense areas. The findings indicate that palindromes have biological significance in the C. elegans genome, as they occur significantly more often than expected under a randomized model. In addition, intergenic regions were found to be the most palindrome- dense in the genome, indicating that palindromes may indeed occur more frequently in close proximity to promoters and enhancers.

Competition history

• JSHS 2023 Category not listed

Resources

• National JSHS abstract book ↗

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