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-Structure paper
Title | SMARCAD1 is an ATP-dependent histone octamer exchange factor with de novo nucleosome assembly activity. |
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Journal, issue, pages | Sci Adv, Vol. 7, Issue 42, Page eabk2380, Year 2021 |
Publish date | Oct 15, 2021 |
Authors | Jonathan Markert / Keda Zhou / Karolin Luger / |
PubMed Abstract | The adenosine 5′-triphosphate (ATP)–dependent chromatin remodeler SMARCAD1 acts on nucleosomes during DNA replication, repair, and transcription, but despite its implication in disease, ...The adenosine 5′-triphosphate (ATP)–dependent chromatin remodeler SMARCAD1 acts on nucleosomes during DNA replication, repair, and transcription, but despite its implication in disease, information on its function and biochemical activities is scarce. Chromatin remodelers use the energy of ATP hydrolysis to slide nucleosomes, evict histones, or exchange histone variants. Here, we show that SMARCAD1 transfers the entire histone octamer from one DNA segment to another in an ATP-dependent manner but is also capable of de novo nucleosome assembly from histone octamer because of its ability to simultaneously bind all histones. We present a low-resolution cryo–electron microscopy structure of SMARCAD1 in complex with a nucleosome and show that the adenosine triphosphatase domains engage their substrate unlike any other chromatin remodeler. Our biochemical and structural data provide mechanistic insights into SMARCAD1-induced nucleosome disassembly and reassembly. |
External links | Sci Adv / PubMed:34652950 / PubMed Central |
Methods | EM (single particle) |
Resolution | 6.2 - 6.49 Å |
Structure data | EMDB-25179: EMDB-25180: |
Source |
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