skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Structure–function studies of histone H3/H4 tetramer maintenance during transcription by chaperone Spt2

Journal Article · · Genes & Development
 [1];  [2];  [1];  [3];  [2];  [1]
  1. Memorial Sloan-Kettering Cancer Center, New York, NY (United States). Structural Biology Program
  2. Univ. of Laval, Quebec, QC (Canada)
  3. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS) and Northeastern Collaborative Access Team (NE-CAT); cornell. Dept. of Chemistry and Chemical Biology

Cells use specific mechanisms such as histone chaperones to abrogate the inherent barrier that the nucleosome poses to transcribing polymerases. The current model postulates that nucleosomes can be transiently disrupted to accommodate passage of RNA polymerases and that histones H3 and H4 possess their own chaperones dedicated to the recovery of nucleosomes. Here, we determined the crystal structure of the conserved C terminus of human Suppressors of Ty insertions 2 (hSpt2C) chaperone bound to an H3/H4 tetramer. The structural studies demonstrate that hSpt2C is bound to the periphery of the H3/H4 tetramer, mimicking the trajectory of nucleosomal-bound DNA. These structural studies have been complemented with in vitro binding and in vivo functional studies on mutants that disrupt key intermolecular contacts involving two acidic patches and hydrophobic residues on Spt2C. We show that contacts between both human and yeast Spt2C with the H3/H4 tetramer are required for the suppression of H3/ H4 exchange as measured by H3K56ac and new H3 deposition. Furthermore, these interactions are also crucial for the inhibition of spurious transcription from within coding regions. In conclusion, together, our data indicate that Spt2 interacts with the periphery of the H3/H4 tetramer and promotes its recycling in the wake of RNA polymerase.

Research Organization:
Cornell Univ., Ithaca, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC); National Institutes of Health (NIH)
Grant/Contract Number:
AC02-06CH11357; LLS-SCOR 7132-08; I5-A554; S10 RR029205
OSTI ID:
1344871
Journal Information:
Genes & Development, Vol. 29, Issue 12; ISSN 0890-9369
Publisher:
Cold Springs Harbor PressCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 26 works
Citation information provided by
Web of Science

References (36)

PHENIX: a comprehensive Python-based system for macromolecular structure solution journal January 2010
Split Decision: What Happens to Nucleosomes during DNA Replication? journal January 2005
Histone Chaperones: Modulators of Chromatin Marks journal March 2011
Equilibrium Folding of the Core Histones:  the H3−H4 Tetramer Is Less Stable than the H2A−H2B Dimer journal June 2003
FACT Facilitates Transcription-Dependent Nucleosome Alteration journal August 2003
Casein Kinase 2 Associates with the Yeast Chromatin Reassembly Factor Spt2/Sin1 To Regulate Its Function in the Repression of Spurious Transcription journal August 2013
The Histone Chaperones Nap1 and Vps75 Bind Histones H3 and H4 in a Tetrameric Conformation journal February 2011
Chromatin- and Transcription-Related Factors Repress Transcription from within Coding Regions throughout the Saccharomyces cerevisiae Genome journal November 2008
Dynamics of Replication-Independent Histone Turnover in Budding Yeast journal March 2007
DAXX envelops a histone H3.3–H4 dimer for H3.3-specific recognition journal October 2012
Structural Basis for the Histone Chaperone Activity of Asf1 journal November 2006
Histone Chaperone Spt16 Promotes Redeposition of the Original H3-H4 Histones Evicted by Elongating RNA Polymerase journal August 2009
Transcription Elongation Factors Repress Transcription Initiation from Cryptic Sites journal August 2003
Splitting of H3-H4 tetramers at transcriptionally active genes undergoing dynamic histone exchange journal January 2011
Kinetics of Core Histones in Living Human Cells journal June 2001
Nucleosome Remodeling Induced by RNA Polymerase II journal March 2002
Amino acid substitutions in the structured domains of histones H3 and H4 partially relieve the requirement of the yeast SWI/SNF complex for transcription. journal November 1995
Structure of the variant histone H3.3–H4 heterodimer in complex with its chaperone DAXX journal November 2012
Crystal structure of the nucleosome core particle at 2.8 Å resolution journal September 1997
Phaser crystallographic software journal July 2007
Refinement of Macromolecular Structures by the Maximum-Likelihood Method journal May 1997
Structure and function of the histone chaperone CIA/ASF1 complexed with histones H3 and H4 journal February 2007
Evidence that Spt2/Sin1, an HMG-Like Factor, Plays Roles in Transcription Elongation, Chromatin Structure, and Genome Stability in Saccharomyces cerevisiae journal February 2006
The chromatin-specific transcription elongation factor FACT comprises human SPT16 and SSRP1 proteins journal July 1999
Vertebrate Spt2 is a novel nucleolar histone chaperone that assists in ribosomal DNA transcription journal January 2013
NMRPipe: A multidimensional spectral processing system based on UNIX pipes journal November 1995
Genome-Wide Replication-Independent Histone H3 Exchange Occurs Predominantly at Promoters and Implicates H3 K56 Acetylation and Asf1 journal August 2007
Ty-mediated gene expression of the LYS2 and HIS4 genes of Saccharomyces cerevisiae is controlled by the same SPT genes. journal April 1984
Transcription-associated histone modifications and cryptic transcription journal January 2013
Activation of the yeast HO gene by release from multiple negative controls journal February 1987
Transcription Regulation by the Noncoding RNA SRG1 Requires Spt2-Dependent Chromatin Deposition in the Wake of RNA Polymerase II journal January 2011
Replication-independent core histone dynamics at transcriptionally active loci in vivo journal March 2005
Molecular replacement with MOLREP journal December 2009
MUTATIONS AFFECTING TY-MEDIATED EXPRESSION OF THE HIS4 GENE OF SACCHAROMYCES CEREVISIAE journal June 1984
Construction of a set of convenientsaccharomyces cerevisiae strains that are isogenic to S288C journal January 1995
Partitioning of Histone H3-H4 Tetramers During DNA Replication-Dependent Chromatin Assembly journal April 2010

Cited By (8)

A novel histone H4 variant H4G regulates rDNA transcription in breast cancer journal June 2019
Histone chaperone networks shaping chromatin function journal January 2017
The Oligomerization Landscape of Histones journal May 2019
Structural insights into the ability of nucleoplasmin to assemble and chaperone histone octamers for DNA deposition journal July 2019
MCM2 binding to histones H3–H4 and ASF1 supports a tetramer-to-dimer model for histone inheritance at the replication fork journal August 2015
A Quantitative Characterization of Nucleoplasmin/Histone Complexes Reveals Chaperone Versatility journal August 2016
Casein kinase 2 mediated phosphorylation of Spt6 modulates histone dynamics and regulates spurious transcription journal June 2018
Inhibition of transcription leads to rewiring of locus-specific chromatin proteomes journal March 2020

Similar Records

Structural basis for recognition of H3K56-acetylated histone H3-H4 by the chaperone Rtt106
Journal Article · Mon Apr 08 00:00:00 EDT 2013 · Nature · OSTI ID:1344871

Recognition of the centromere-specific histone Cse4 by the chaperone Scm3
Journal Article · Tue Sep 20 00:00:00 EDT 2011 · Proc. Natl. Acad. Sci. USA · OSTI ID:1344871

The histone H3-H4 tetramer is a copper reductase enzyme
Journal Article · Thu Jul 02 00:00:00 EDT 2020 · Science · OSTI ID:1344871