UBTF
Nucleolar transcription factor 1
Also known as: NOR-90, UBF, UBF1, UBF1_HUMAN, UBF2
Cross-references: UniProt · Ensembl · Human Protein Atlas · GeneCards · NCBI Gene
Protein identityUniProt · HPA
- UniProt accession
- P17480
- Gene
- UBTF
- Ensembl
- ENSG00000108312
- Chromosome
- 17
- Canonical length
- 764 aa
- Protein class
- Disease related genes, Human disease related genes, Plasma proteins, Predicted intracellular proteins, Transcription factors
- Subcellular location
- Nucleoli fibrillar center
- Quaternary structure
- Homodimer
OverviewNCBI Gene
This gene encodes a member of the HMG-box DNA-binding protein family. The encoded protein plays a critical role in ribosomal RNA transcription as a key component of the pre-initiation complex, mediating the recruitment of RNA polymerase I to rDNA promoter regions. The encoded protein may also play important roles in chromatin remodeling and pre-rRNA processing, and its activity is regulated by both phosphorylation and acetylation. Alternatively spliced transcript variants encoding multiple isoforms have been observed for this gene. Pseudogenes of this gene are located on the short arm of chromosomes 3, 11 and X and the long arm of chromosome 11. [provided by RefSeq, Aug 2011]
Canonical amino-acid sequenceUniProt
764 residues, UniProt reviewed canonical sequence.
>P17480|UBTF
1 MNGEADCPTD LEMAAPKGQD RWSQEDMLTL LECMKNNLPS NDSSKFKTTE SHMDWEKVAF
61 KDFSGDMCKL KWVEISNEVR KFRTLTELIL DAQEHVKNPY KGKKLKKHPD FPKKPLTPYF
121 RFFMEKRAKY AKLHPEMSNL DLTKILSKKY KELPEKKKMK YIQDFQREKQ EFERNLARFR
181 EDHPDLIQNA KKSDIPEKPK TPQQLWYTHE KKVYLKVRPD ATTKEVKDSL GKQWSQLSDK
241 KRLKWIHKAL EQRKEYEEIM RDYIQKHPEL NISEEGITKS TLTKAERQLK DKFDGRPTKP
301 PPNSYSLYCA ELMANMKDVP STERMVLCSQ QWKLLSQKEK DAYHKKCDQK KKDYEVELLR
361 FLESLPEEEQ QRVLGEEKML NINKKQATSP ASKKPAQEGG KGGSEKPKRP VSAMFIFSEE
421 KRRQLQEERP ELSESELTRL LARMWNDLSE KKKAKYKARE AALKAQSERK PGGEREERGK
481 LPESPKRAEE IWQQSVIGDY LARFKNDRVK ALKAMEMTWN NMEKKEKLMW IKKAAEDQKR
541 YERELSEMRA PPAATNSSKK MKFQGEPKKP PMNGYQKFSQ ELLSNGELNH LPLKERMVEI
601 GSRWQRISQS QKEHYKKLAE EQQKQYKVHL DLWVKSLSPQ DRAAYKEYIS NKRKSMTKLR
661 GPNPKSSRTT LQSKSESEED DEEDEDDEDE DEEEEDDENG DSSEDGGDSS ESSSEDESED
721 GDENEEDDED EDDDEDDDED EDNESEGSSS SSSSSGDSSD SDSNLocalizationUniProt · AlphaFold · HPA
Whether an antibody against UBTF can act on the native protein depends on physical access: surface and secreted proteins are reachable by circulating antibodies, intracellular proteins usually are not.
- Antibody reachability
- Intracellular
- Secreted
- No
- Transmembrane segments
- 0
- Mean surface accessibility (rSASA)
- 0.44
- Highest tissue expression
- 69 nTPM
Expression across tissuesHPA
Tissue
- thymus: 69 nTPM
- lymph node: 64 nTPM
- skeletal muscle: 62 nTPM
- cerebellum: 55 nTPM
- bone marrow: 53 nTPM
- tonsil: 49 nTPM
Single-cell type
- erythrocyte progenitors: 178 nCPM
- megakaryocyte progenitors: 98 nCPM
- megakaryocyte-erythroid progenitors: 90 nCPM
- hematopoietic stem cells: 84 nCPM
- innate lymphoid cells: 73 nCPM
- retinal bipolar cells: 71 nCPM
Immune cell
- MAIT T-cell: 17 nTPM
- memory CD8 T-cell: 17 nTPM
- NK-cell: 16 nTPM
- gdT-cell: 16 nTPM
- naive B-cell: 14 nTPM
- naive CD8 T-cell: 13 nTPM
Brain region
- cerebellum: 56 nTPM
- cerebral cortex: 53 nTPM
- amygdala: 53 nTPM
- thalamus: 51 nTPM
- white matter: 51 nTPM
- hippocampal formation: 50 nTPM
DiseaseUniProt · ClinVar · IEDB · PubMed
Four sources answering four different questions about UBTF.
Disease | AllUniProt
Conditions UBTF is implicated in, by any mechanism.
- Neurodegeneration, childhood-onset, with brain atrophy (CONDBA) MIM:617672
Disease | GeneticClinVar
7 pathogenic / likely-pathogenic of 194 ClinVar records.
Conditions with pathogenic or likely-pathogenic variants.
- Childhood-onset motor and cognitive regression syndrome with extrapyramidal movement disorder
- UBTF-related disorder
- UBTF E210K Neuroregression Syndrome
- Infantile or childhood onset neurodegenerative disease, global developmental delay, and intellectual disability
- Inborn genetic diseases
Disease | AutoantibodyPubMed
Conditions in which antibodies against UBTF are reported. Each links to that disease's full target list.
ReferencesPubMed · IEDB
Publications for UBTF from three distinct lines of evidence, kept separate because they answer different questions: whether antibodies are directed at the protein, whether a B-cell epitope has been mapped on it, and whether a T-cell epitope has. Each is labelled with its source.
Reference: AutoantibodyPubMed
13 publications
- Disease-related autoantibody profile in patients with systemic sclerosis.
2017 · Autoimmunity · RCR 3.8 · 80 citations - Human autoantibody to RNA polymerase I transcription factor hUBF. Molecular identity of nucleolus organizer region autoantigen NOR-90 and ribosomal RNA transcription upstream binding factor.
1991 · J Exp Med · RCR 3.5 · 153 citations - The analysis of antinuclear and antinucleolar autoantibodies of scleroderma by radioimmunoprecipitation assays.
1990 · Arthritis Rheum · RCR 2.6 · 85 citations - Anti-NOR 90. A new autoantibody in scleroderma that recognizes a 90-kDa component of the nucleolus-organizing region of chromatin.
1987 · J Immunol · RCR 2.2 · 85 citations - Detection of autoantibodies to nucleolar transcription factor NOR 90/hUBF in sera of patients with rheumatic diseases, by recombinant autoantigen-based assays.
1996 · Arthritis Rheum · RCR 0.8 · 27 citations
Show 8 more
- Clinical relevance and HLA association of autoantibodies against the nucleolus organizer region (NOR-90).
1995 · J Rheumatol · RCR 0.8 · 26 citations - Autoantibodies to the nucleolar organizer antigen NOR-90 in children with systemic rheumatic diseases.
1995 · J Rheumatol · RCR 0.5 · 14 citations - Comment on: Anti-NOR90 antibody associated with paraneoplastic systemic sclerosis.
2023 · Clin Exp Rheumatol · RCR 0.4 · 2 citations - Anti-NOR90 antibody associated with paraneoplastic systemic sclerosis.
2022 · Clin Exp Rheumatol · RCR 0.4 · 3 citations - [Autoantibodies in systemic sclerosis: clinical interest and diagnosis approach].
2009 · Ann Biol Clin (Paris) · RCR 0.2 · 6 citations - The two isoforms of the 90-kDalton nucleolus organizer region autoantigen (upstream binding factor) bind with different avidity to DNA modified by the antitumor drug cisplatin.
1996 · Biochem Pharmacol · RCR 0.1 · 6 citations - Anti-NOR90 antibodies and their clinical significance: a multicenter experience in southern Spain.
2025 · Rev Clin Esp (Barc) - Prevalence and clinical significance of anti-NOR90 antibodies in systemic sclerosis: Results from a multicentre cohort and systematic literature review.
2026 · Autoimmun Rev
Sources: PubMed — antigen-level antibody evidence from a custom retrieval. Records matching a controlled set of autoantibody terms (the MeSH descriptors Autoantibodies and Autoantigens, with title and abstract term variants) were obtained through NCBI E-utilities, and their titles and abstracts parsed for constructions that direct an antibody at a named protein rather than for co-occurrence. Captured names were resolved against UniProt nomenclature and each antigen adjudicated individually against the source text. Bibliographic records from PubMed and MeSH, U.S. National Library of Medicine; citation metrics from NIH iCite (Hutchins et al., PLoS Biology 2016). Titles link to PubMed; abstracts are not reproduced here. The NLM does not endorse this analysis.
Genetic constraint and essentialitygnomAD · DepMap
Does the body need this protein intact? Low LOEUF or a strong DepMap dependency means loss or blockade of the protein is likely to be felt.
- gnomAD LOEUF (loss-of-function intolerance)
- 0.06
- gnomAD pLI
- 1
- gnomAD missense Z
- 4.75
- DepMap mean gene effect
- -1.67
- DepMap dependency class
- pan
Cancer expressionTCGA
Across TCGA tumor cohorts, this protein is over-expressed in roughly 4% of surveyed tumor types (aggregate summary; per-cohort expression, alteration, and survival load in the interactive view).
OntologyGO
Biological processes
- positive regulation of transcription by RNA polymerase I
- transcription by RNA polymerase I
- transcription initiation at RNA polymerase I promoter
Molecular functions
- chromatin binding
- RNA binding
- RNA polymerase I core promoter sequence-specific DNA binding
- RNA polymerase I general transcription initiation factor activity
- scaffold protein binding
- RNA polymerase I cis-regulatory region sequence-specific DNA binding
Cellular components
Protein domainsUniProt · Pfam · InterPro
- High mobility group box domain
- High mobility group box domain superfamily
- Upstream Binding Factor 1
- HMG (high mobility group) box
- HMG-box domain
- High mobility group box domain 5
- HMG (high mobility group) box 5
KeywordsUniProt
InteractionsUniProt · HPA
Protein binding partners of UBTF in the human serome: UniProt-annotated complex subunits plus reported interactors. Each links to its own Seroatlas record.
Antibody and autoantibody relevanceSeroatlas analysis
Seroatlas reads UBTF as an antibody target. Whether an autoantibody or antibody against UBTF could matter depends on whether native UBTF is physically reachable, whether the body needs it intact, and whether it acts in a disease-relevant tissue.
UBTF is annotated as predominantly intracellular. Intracellular proteins are common autoantibody markers, becoming visible to the immune system after cell injury or altered processing, but are usually markers of disease rather than direct drivers.
Annotation status
The present source text does not explicitly label UBTF as an autoantigen. Seroatlas presents hypothesis context only and does not manufacture a known-serology claim.
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