PQBP1 May suppress the ability of POU3F2 to transactivate the DRD1 gene in a POU3F2 dependent manner. Can activate transcription directly or via association with the transcription machinery. May be involved in ATXN1 mutant-induced cell death. The interaction with ATXN1 mutant reduces levels of phosphorylated RNA polymerase II large subunit. Defects in PQBP1 are the cause of Renpenning syndrome 1 (RENS1); also known as Sutherland-Haan X-linked mental retardation syndrome (SHS) or X-linked mental retardation syndromes MRXS3/MRXS8/MRX55. The clinical features are mental retardation, microcephaly, short stature, and small testes. The craniofacies tends to be narrow and tall with upslanting palpebral fissures, abnormal nasal configuration, cupped ears, and short philtrum. The nose may appear long or bulbous, with overhanging columella. Less consistent manifestations include ocular colobomas, cardiac malformations, cleft palate, and anal anomalies. RENS1 is more frequently in males than in females where little or no expression is found. 10 isoforms of the human protein are produced by alternative splicing. Note: This description may include information from UniProtKB.
Protein type: Transcription, coactivator/corepressor
Chromosomal Location of Human Ortholog: Xp11.23
Cellular Component:  cytosol; nuclear speck; nucleoplasm; nucleus
Molecular Function:  DNA binding; double-stranded DNA binding; protein binding; ribonucleoprotein complex binding; transcription coactivator activity
Biological Process:  activation of innate immune response; alternative mRNA splicing, via spliceosome; cellular response to exogenous dsRNA; defense response to virus; innate immune response; mRNA splicing, via spliceosome; neuron projection development; positive regulation of defense response to virus by host; positive regulation of nucleic acid-templated transcription; positive regulation of type I interferon production; regulation of RNA splicing; regulation of transcription, DNA-templated
Disease: Renpenning Syndrome 1
Reference #:  O60828 (UniProtKB)
Alt. Names/Synonyms: 38 kDa nuclear protein containing a WW domain; MRX55; MRXS3; MRXS8; NPW38; nuclear protein containing WW domain 38 kD; polyglutamine binding protein 1; Polyglutamine tract-binding protein 1; Polyglutamine-binding protein 1; PQBP-1; PQBP1; RENS1; SHS
Gene Symbols: PQBP1
Molecular weight: 30,472 Da
Basal Isoelectric point: 5.92  Predict pI for various phosphorylation states
Select Structure to View Below


Protein Structure Not Found.

Cross-references to other databases:  STRING  |  cBioPortal  |  Wikipedia  |  neXtProt  |  Protein Atlas  |  BioGPS  |  Pfam  |  RCSB PDB  |  Phospho.ELM  |  NetworKIN  |  GeneCards  |  UniProtKB  |  Entrez-Gene  |  GenPept  |  Ensembl Gene  |  Ensembl Protein