Genomics

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G4 quadruplex landscape and its regulation revealed by a new antibody capture method


ABSTRACT: Currently, the identification of G4 quadruplexes in vivo depends on a published and widely used G4-ChIP protocol (PMID: 29470465) that uses the anti-G4 antibody to captures the quadruplexes like regular chromatin. This method is challenged by some false positives and false negatives in G4-quadruplex capture. We have developed an antibody capture G4-ChIP (AbC G4-ChIP) method to overcome these challenges. The AbC G4-ChIP achieves (i) minimized in vitro artifacts during the incubation steps, and (ii) capture of G4-quadruplexes which are not protein-bound. We have applied the AbC G4-ChIP to study the regulatory effect of a CGG-repeat binding protein CGGBP1 on G4-quadruplex formation. The AbC G4-ChIP identifies inter-strand G/C-skew as a sequence property associated with CGGBP1-regulated G4-quadruplexes.

ORGANISM(S): Homo sapiens

PROVIDER: GSE202456 | GEO | 2024/03/20

REPOSITORIES: GEO

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