NONO DNA- and RNA binding protein, involved in several nuclear processes. Binds the conventional octamer sequence in double-stranded DNA. Also binds single-stranded DNA and RNA at a site independent of the duplex site. Involved in pre-mRNA splicing, probably as a heterodimer with SFPQ. Interacts with U5 snRNA, probably by binding to a purine-rich sequence located on the 3' side of U5 snRNA stem 1b. Together with PSPC1, required for the formation of nuclear paraspeckles. The SFPQ-NONO heteromer associated with MATR3 may play a role in nuclear retention of defective RNAs. The SFPQ-NONO heteromer may be involved in DNA unwinding by modulating the function of topoisomerase I/TOP1. The SFPQ-NONO heteromer may be involved in DNA non-homologous end joining (NHEJ) required for double-strand break repair and V(D)J recombination and may stabilize paired DNA ends. In vitro, the complex strongly stimulates DNA end joining, binds directly to the DNA substrates and cooperates with the Ku70/G22P1-Ku80/XRCC5 (Ku) dimer to establish a functional preligation complex. NONO is involved in transcriptional regulation. The SFPQ-NONO-NR5A1 complex binds to the CYP17 promoter and regulates basal and cAMP-dependent transcriptional activity. NONO binds to an enhancer element in long terminal repeats of endogenous intracisternal A particles (IAPs) and activates transcription. Regulates the circadian clock by repressing the transcriptional activator activity of the CLOCK-ARNTL/BMAL1 heterodimer. Important for the functional organization of GABAergic synapses. Plays a specific and important role in the regulation of synaptic RNAs and GPHN/gephyrin scaffold structure, through the regulation of GABRA2 transcript. Plays a role in the regulation of DNA virus-mediated innate immune response by assembling into the HDP-RNP complex, a complex that serves as a platform for IRF3 phosphorylation and subsequent innate immune response activation through the cGAS-STING pathway. Heart, brain, placenta, lung, liver, skeletal muscle, kidney and pancreas. Also found in a number of breast tumor cell lines. 2 alternatively spliced human isoforms have been reported. Note: This description may include information from UniProtKB.
Protein type: Nuclear receptor co-regulator; Nucleolus; RNA splicing; RNA-binding
Chromosomal Location of human Ortholog: Xq13.1
Cellular Component:  chromosome; fibrillar center; nuclear matrix; nuclear speck; nucleoplasm; nucleus; paraspeckles; RNA polymerase II transcription regulator complex
Molecular Function:  chromatin binding; DNA binding; identical protein binding; lncRNA binding; protein binding; RNA binding
Biological Process:  activation of innate immune response; cellular response to angiotensin; cellular response to oxygen-glucose deprivation; circadian rhythm; DNA recombination; DNA repair; innate immune response; mRNA processing; negative regulation of DNA-templated transcription; negative regulation of oxidative stress-induced neuron intrinsic apoptotic signaling pathway; regulation of circadian rhythm; regulation of DNA-templated transcription; RNA splicing
Disease: Mental Retardation, X-linked, Syndromic 34
Reference #:  Q15233 (UniProtKB)
Alt. Names/Synonyms: 54 kDa nuclear RNA- and DNA-binding protein; 55 kDa nuclear protein; DNA-binding p52/p100 complex, 52 kDa subunit; MRXS34; NMT55; non-POU domain containing octamer binding; non-POU domain containing, octamer-binding; non-POU domain-containing octamer (ATGCAAAT) binding protein; Non-POU domain-containing octamer-binding protein; NONO; NonO protein; NRB54; P54; p54(nrb); p54nrb; PPP1R114; protein phosphatase 1, regulatory subunit 114
Gene Symbols: NONO
Molecular weight: 54,232 Da
Basal Isoelectric point: 9.01  Predict pI for various phosphorylation states
Protein-Specific Antibodies, siRNAs or Recombinant Proteins from Cell Signaling Technology® Total Proteins
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Protein Structure Not Found.

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