Journal
BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS
Volume 508, Issue 3, Pages 864-870Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.bbrc.2018.11.150
Keywords
Histone chaperone; FACT; Spt16; Histone (H3-H4)(2); Aminopeptidase-like domain
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Funding
- National Natural Science Foundation of China [31370735, 31670737]
- National Key Research and Development Program of China [2017YFA0505900]
- Sichuan Province Foundation from the Science and Technology Department of Sichuan Province, China [2014KJT021-2014SZ, 2015JQ0029]
- Chengdu HI-TECH Industrial Development Zone, Sichuan Province, China [2016-XT0-00033-GX]
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FACT (Facilitates Chromatin Transactions) is a heterodimeric protein complex involved in RNA poly-merase H transcription elongation, playing essential roles in chromatin remodeling during transcription, replication, and DNA damage repair. The FACT subunit hSpt16 is essential for nucleosome reorganization. The N-terminal domain of hSpt16 (hSpt16-NTD) was recently described as a histone (H3-H4)(2)-binding domain; however, its mode of interaction remains unknown. In this study, we solved the structure of hSpt16-NTD437 at 2.19 angstrom and found that a long-disordered region (hSpt16-LDR), after the main body of hSpt16-NTD, is a novel histone-binding motif. Furthermore, hSpt16-LDR interaction with (H3-H4)(2) is H3 N-terminal tail-independent. Therefore, Spt16-NTD is a histone H3-H4-specific binding domain with a distinct mechanism of interaction between histones and histone chaperones. (C) 2018 Elsevier Inc. All rights reserved.
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