Recombinant Human Ribosomal RNA-processing protein 8 (RRP8)

Uniprot Id

O43159

Target Species

Human

Target Name

RRP8

Target Full Name

Ribosomal RNA-processing protein 8

Target Function

Essential component of the eNoSC (energy-dependent nucleolar silencing) complex, a complex that mediates silencing of rDNA in response to intracellular energy status and acts by recruiting histone-modifying enzymes. The eNoSC complex is able to sense the energy status of cell: upon glucose starvation, elevation of NAD(+)/NADP(+) ratio activates SIRT1, leading to histone H3 deacetylation followed by dimethylation of H3 at 'Lys-9' (H3K9me2) by SUV39H1 and the formation of silent chromatin in the rDNA locus. In the complex, RRP8 binds to H3K9me2 and probably acts as a methyltransferase. Its substrates are however unknown.

Target Subcellular Location

Nucleus, nucleolus. Note=Localizes at rDNA locus.

Target Protein Families

Methyltransferase superfamily, RRP8 family

Target Synonyms

Cerebral protein 1; hypothetical protein LOC23378; KIAA0409; NML; Nucleomethylin; Ribosomal RNA processing 8 methyltransferase homolog; Ribosomal RNA processing 8, methyltransferase, homolog (yeast); Ribosomal RNA processing protein 8; Ribosomal RNA-processing protein 8; RRP 8; RRP8; RRP8 methyltransferase homolog; RRP8_HUMAN

Target Background

Enables methylated histone binding activity. Involved in several processes, including cellular response to glucose starvation; intrinsic apoptotic signaling pathway by p53 class mediator; and regulation of gene expression. Located in several cellular components, including cytosol; nuclear lumen; and rDNA heterochromatin. Part of chromatin silencing complex.