PMID- 20651253 OWN - NLM STAT- MEDLINE DCOM- 20100907 LR - 20211020 IS - 1091-6490 (Electronic) IS - 0027-8424 (Print) IS - 0027-8424 (Linking) VI - 107 IP - 32 DP - 2010 Aug 10 TI - Daxx is an H3.3-specific histone chaperone and cooperates with ATRX in replication-independent chromatin assembly at telomeres. PG - 14075-80 LID - 10.1073/pnas.1008850107 [doi] AB - The histone variant H3.3 is implicated in the formation and maintenance of specialized chromatin structure in metazoan cells. H3.3-containing nucleosomes are assembled in a replication-independent manner by means of dedicated chaperone proteins. We previously identified the death domain associated protein (Daxx) and the alpha-thalassemia X-linked mental retardation protein (ATRX) as H3.3-associated proteins. Here, we report that the highly conserved N terminus of Daxx interacts directly with variant-specific residues in the H3.3 core. Recombinant Daxx assembles H3.3/H4 tetramers on DNA templates, and the ATRX-Daxx complex catalyzes the deposition and remodeling of H3.3-containing nucleosomes. We find that the ATRX-Daxx complex is bound to telomeric chromatin, and that both components of this complex are required for H3.3 deposition at telomeres in murine embryonic stem cells (ESCs). These data demonstrate that Daxx functions as an H3.3-specific chaperone and facilitates the deposition of H3.3 at heterochromatin loci in the context of the ATRX-Daxx complex. FAU - Lewis, Peter W AU - Lewis PW AD - Laboratory of Chromatin Biology and Epigenetics, Rockefeller University, 1230 York Ave, New York, NY 10065, USA. FAU - Elsaesser, Simon J AU - Elsaesser SJ FAU - Noh, Kyung-Min AU - Noh KM FAU - Stadler, Sonja C AU - Stadler SC FAU - Allis, C David AU - Allis CD LA - eng GR - R37 GM053512/GM/NIGMS NIH HHS/United States GR - GM53512/GM/NIGMS NIH HHS/United States GR - GM53122/GM/NIGMS NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't DEP - 20100722 PL - United States TA - Proc Natl Acad Sci U S A JT - Proceedings of the National Academy of Sciences of the United States of America JID - 7505876 RN - 0 (Carrier Proteins) RN - 0 (Co-Repressor Proteins) RN - 0 (Daxx protein, mouse) RN - 0 (Heterochromatin) RN - 0 (Histone Chaperones) RN - 0 (Histones) RN - 0 (Intracellular Signaling Peptides and Proteins) RN - 0 (Molecular Chaperones) RN - 0 (Multiprotein Complexes) RN - 0 (Nuclear Proteins) RN - 0 (Nucleosomes) RN - EC 3.6.4.- (DNA Helicases) RN - EC 3.6.4.12 (Atrx protein, mouse) RN - EC 3.6.4.12 (X-linked Nuclear Protein) SB - IM MH - Animals MH - Carrier Proteins/metabolism/*physiology MH - *Chromatin Assembly and Disassembly MH - Co-Repressor Proteins MH - DNA Helicases/*metabolism MH - Embryonic Stem Cells MH - Heterochromatin MH - Histone Chaperones/*metabolism MH - Histones/*metabolism MH - Intracellular Signaling Peptides and Proteins/metabolism/*physiology MH - Mice MH - Molecular Chaperones MH - Multiprotein Complexes MH - Nuclear Proteins/*metabolism/*physiology MH - Nucleosomes/metabolism MH - Protein Binding MH - *Telomere MH - X-linked Nuclear Protein PMC - PMC2922592 COIS- The authors declare no conflict of interest. EDAT- 2010/07/24 06:00 MHDA- 2010/09/09 06:00 PMCR- 2010/07/22 CRDT- 2010/07/24 06:00 PHST- 2010/07/24 06:00 [entrez] PHST- 2010/07/24 06:00 [pubmed] PHST- 2010/09/09 06:00 [medline] PHST- 2010/07/22 00:00 [pmc-release] AID - 1008850107 [pii] AID - 201008850 [pii] AID - 10.1073/pnas.1008850107 [doi] PST - ppublish SO - Proc Natl Acad Sci U S A. 2010 Aug 10;107(32):14075-80. doi: 10.1073/pnas.1008850107. Epub 2010 Jul 22.