Generating Specificity in Genome Regulation Through Transcription Factor Sensitivity to Chromatin

Overview

Journal Nat Rev Genet

Specialty Genetics

Date 2022 Jul 13

PMID 35831531

Authors

Luke Isbel

Ralph S Grand

Dirk Schubeler

Affiliations

Soon will be listed here.

Abstract

Cell type-specific gene expression relies on transcription factors (TFs) binding DNA sequence motifs embedded in chromatin. Understanding how motifs are accessed in chromatin is crucial to comprehend differential transcriptional responses and the phenotypic impact of sequence variation. Chromatin obstacles to TF binding range from DNA methylation to restriction of DNA access by nucleosomes depending on their position, composition and modification. In vivo and in vitro approaches now enable the study of TF binding in chromatin at unprecedented resolution. Emerging insights suggest that TFs vary in their ability to navigate chromatin states. However, it remains challenging to link binding and transcriptional outcomes to molecular characteristics of TFs or the local chromatin substrate. Here, we discuss our current understanding of how TFs access DNA in chromatin and novel techniques and directions towards a better understanding of this critical step in genome regulation.

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