2ZFU image
Deposition Date 2008-01-14
Release Date 2008-12-02
Last Version Date 2024-03-13
Entry Detail
PDB ID:
2ZFU
Keywords:
Title:
Structure of the methyltransferase-like domain of nucleomethylin
Biological Source:
Source Organism:
Homo sapiens (Taxon ID: 9606)
Host Organism:
Method Details:
Experimental Method:
Resolution:
2.00 Å
R-Value Free:
0.23
R-Value Work:
0.19
R-Value Observed:
0.19
Space Group:
P 61
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:Cerebral protein 1
Gene (Uniprot):RRP8
Chain IDs:A, B
Chain Length:215
Number of Molecules:2
Biological Source:Homo sapiens
Ligand Molecules
Primary Citation
Epigenetic control of rDNA loci in response to intracellular energy status
Cell(Cambridge,Mass.) 133 627 639 (2008)
PMID: 18485871 DOI: 10.1016/j.cell.2008.03.030

Abstact

Intracellular energy balance is important for cell survival. In eukaryotic cells, the most energy-consuming process is ribosome biosynthesis, which adapts to changes in intracellular energy status. However, the mechanism that links energy status and ribosome biosynthesis is largely unknown. Here, we describe eNoSC, a protein complex that senses energy status and controls rRNA transcription. eNoSC contains Nucleomethylin, which binds histone H3 dimethylated Lys9 in the rDNA locus, in a complex with SIRT1 and SUV39H1. Both SIRT1 and SUV39H1 are required for energy-dependent transcriptional repression, suggesting that a change in the NAD(+)/NADH ratio induced by reduction of energy status could activate SIRT1, leading to deacetylation of histone H3 and dimethylation at Lys9 by SUV39H1, thus establishing silent chromatin in the rDNA locus. Furthermore, eNoSC promotes restoration of energy balance by limiting rRNA transcription, thus protecting cells from energy deprivation-dependent apoptosis. These findings provide key insight into the mechanisms of energy homeostasis in cells.

Legend

Protein

Chemical

Disease

Primary Citation of related structures