Structure and Function of the Histone Chaperone FACT - Resolving FACTual Issues

Overview

Journal Biochim Biophys Acta Gene Regul Mech

Publisher Elsevier

Specialties Biochemistry
Biophysics
Genetics
Molecular Biology

Date 2018 Jul 29

PMID 30055319

Citations 55

Authors

Katerina Gurova

Han-Wen Chang

Maria E Valieva

Poorva Sandlesh

Vasily M Studitsky

Affiliations

Soon will be listed here.

Abstract

FAcilitates Chromatin Transcription (FACT) has been considered essential for transcription through chromatin mostly based on cell-free experiments. However, FACT inactivation in cells does not cause a significant reduction in transcription. Moreover, not all mammalian cells require FACT for viability. Here we synthesize information from different organisms to reveal the core function(s) of FACT and propose a model that reconciles the cell-free and cell-based observations. We describe FACT structure and nucleosomal interactions, and their roles in FACT-dependent transcription, replication and repair. The variable requirements for FACT among different tumor and non-tumor cells suggest that various FACT-dependent processes have significantly different levels of relative importance in different eukaryotic cells. We propose that the stability of chromatin, which might vary among different cell types, dictates these diverse requirements for FACT to support cell viability. Since tumor cells are among the most sensitive to FACT inhibition, this vulnerability could be exploited for cancer treatment.

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