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A short GC‐rich palindrome of human mannose receptor gene coding region displays a conformational switch
Author(s) -
Bansal Aparna,
Prasad Manoj,
Roy Kapil,
Kukreti Shrikant
Publication year - 2012
Publication title -
biopolymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.556
H-Index - 125
eISSN - 1097-0282
pISSN - 0006-3525
DOI - 10.1002/bip.22111
Subject(s) - chemistry , circular dichroism , palindromic sequence , dna , gene , sequence (biology) , coding region , dna sequencing , palindrome , crystallography , genetics , stereochemistry , biochemistry , biology , genome
Conformational switching in DNA is fundamental to biological processes. The structural status of a palindromic GC‐rich dodecamer DNA sequence, integral part of human MRC2 coding region, and a related sequence of opposite polarity from human FDX1 gene were characterized and compared. UV‐melting, circular dichroism, and gel electrophoresis experiments demonstrated the formation of intermolecular structures. Although stability and molecularity of both the oligomeric structures were found to be almost identical, their secondary structures differed remarkably as A1 MRC2 sequence showed A‐like and B‐like DNA conformation, whereas the A2 FDX1 sequence exhibited only the A‐like signatures. The study is relevant for understanding structural polymorphism at genomic locations depending on DNA sequence and solution environment. © 2012 Wiley Periodicals, Inc. Biopolymers 97:950–962, 2012.