FUNCTION: Regulatory subunit of the ATP-dependent NoRC-1 and NoRC-5 ISWI chromatin remodeling complexes, which form ordered nucleosome arrays on chromatin and facilitate access to DNA during DNA-templated processes such as DNA replication, transcription, and repair (PubMed:28801535). Both complexes ...
FUNCTION: Regulatory subunit of the ATP-dependent NoRC-1 and NoRC-5 ISWI chromatin remodeling complexes, which form ordered nucleosome arrays on chromatin and facilitate access to DNA during DNA-templated processes such as DNA replication, transcription, and repair (PubMed:28801535). Both complexes regulate the spacing of nucleosomes along the chromatin and have the ability to slide mononucleosomes to the center of a DNA template (PubMed:28801535). Directly stimulates the ATPase activity of SMARCA5 in the NoRC-5 ISWI chromatin remodeling complex (PubMed:28801535). The NoRC-1 ISWI chromatin remodeling complex has a lower ATP hydrolysis rate than the NoRC-5 ISWI chromatin remodeling complex (PubMed:28801535). Within the NoRC-5 ISWI chromatin remodeling complex, mediates silencing of a fraction of rDNA by recruiting histone-modifying enzymes and DNA methyltransferases, leading to heterochromatin formation and transcriptional silencing (By similarity). In the complex, it plays a central role by being recruited to rDNA and by targeting chromatin modifying enzymes such as HDAC1, leading to repress RNA polymerase I transcription (By similarity). Recruited to rDNA via its interaction with TTF1 and its ability to recognize and bind histone H4 acetylated on 'Lys-16' (H4K16ac), leading to deacetylation of H4K5ac, H4K8ac, H4K12ac but not H4K16ac (By similarity). Specifically binds pRNAs, 150-250 nucleotide RNAs that are complementary in sequence to the rDNA promoter; pRNA-binding is required for heterochromatin formation and rDNA silencing (By similarity). {ECO:0000250|UniProtKB:Q91YE5, ECO:0000269|PubMed:28801535}.
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GO - Biological processes (BP):
chromatin remodeling [GO:0006338]; DNA methylation [GO:0006306]; histone deacetylation [GO:0016575]; rDNA heterochromatin assembly [GO:0000183]; regulation of transcription, DNA-templated [GO:0006355]; RNA polymerase I preinitiation complex assembly [GO:0001188]; transcription, DNA-templated [GO:000...
chromatin remodeling [GO:0006338]; DNA methylation [GO:0006306]; histone deacetylation [GO:0016575]; rDNA heterochromatin assembly [GO:0000183]; regulation of transcription, DNA-templated [GO:0006355]; RNA polymerase I preinitiation complex assembly [GO:0001188]; transcription, DNA-templated [GO:0006351]
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GO - Molecular function (MF):
DNA binding [GO:0003677]; histone binding [GO:0042393]; lysine-acetylated histone binding [GO:0070577]; metal ion binding [GO:0046872]; nuclear receptor binding [GO:0016922]; RNA binding [GO:0003723]...
DNA binding [GO:0003677]; histone binding [GO:0042393]; lysine-acetylated histone binding [GO:0070577]; metal ion binding [GO:0046872]; nuclear receptor binding [GO:0016922]; RNA binding [GO:0003723]
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GO - Cellular component (CC):
chromatin silencing complex [GO:0005677]; cytosol [GO:0005829]; nuclear speck [GO:0016607]; nucleolus [GO:0005730]; rDNA heterochromatin [GO:0033553]...
chromatin silencing complex [GO:0005677]; cytosol [GO:0005829]; nuclear speck [GO:0016607]; nucleolus [GO:0005730]; rDNA heterochromatin [GO:0033553]
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