New Approaches to the Analysis of Palindromic Sequences from the Human Genome: Evolution and Polymorphism of an Intronic Site at the NF1 Locus

Overview

Journal Nucleic Acids Res

Publisher Oxford University Press

Specialty Biochemistry

Date 2005 Dec 13

PMID 16340004

Citations 8

Authors

Susanna M Lewis

Shuang Chen

Jeffrey N Strathern

Alison J Rattray

Affiliations

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Abstract

The nature of any long palindrome that might exist in the human genome is obscured by the instability of such sequences once cloned in Escherichia coli. We describe and validate a practical alternative to the analysis of naturally-occurring palindromes based upon cloning and propagation in Saccharomyces cerevisiae. With this approach we have investigated an intronic sequence in the human Neurofibromatosis 1 (NF1) locus that is represented by multiple conflicting versions in GenBank. We find that the site is highly polymorphic, exhibiting different degrees of palindromy in different individuals. A side-by-side comparison of the same plasmids in E.coli versus. S.cerevisiae demonstrated that the more palindromic alleles were inevitably corrupted upon cloning in E.coli, but could be propagated intact in yeast. The high quality sequence obtained from the yeast-based approach provides insight into the various mechanisms that destabilize a palindrome in E.coli, yeast and humans, into the diversification of a highly polymorphic site within the NF1 locus during primate evolution, and into the association between palindromy and chromosomal translocation.

Citing Articles

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Palindrome-Mediated Translocations in Humans: A New Mechanistic Model for Gross Chromosomal Rearrangements.

Inagaki H, Kato T, Tsutsumi M, Ouchi Y, Ohye T, Kurahashi H Front Genet. 2016; 7:125.

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Decoding NF1 Intragenic Copy-Number Variations.

Hsiao M, Piotrowski A, Callens T, Fu C, Wimmer K, Claes K Am J Hum Genet. 2015; 97(2):238-49.

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GAP-Seq: a method for identification of DNA palindromes.

Yang H, Volfovsky N, Rattray A, Chen X, Tanaka H, Strathern J BMC Genomics. 2014; 15:394.

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