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In genetics and molecular biology, a corepressor is a molecule that represses the expression of genes. [1] In prokaryotes, corepressors are small molecules whereas in eukaryotes, corepressors are proteins. A corepressor does not directly bind to DNA, but instead indirectly regulates gene expression by binding to repressors.
Corepressor proteins also bind to the surface of the ligand binding domain of nuclear receptors, but through a LXXXIXXX(I/L) motif of amino acids (where L = leucine, I = isoleucine and X = any amino acid). [7] In addition, compressors bind preferentially to the apo (ligand free) form of the nuclear receptor (or possibly antagonist bound receptor).
The binding of a ligand hormone causes the corepressor to dissociate and a coactivator is recruited. The activator bound coactivator recruits RNA polymerase and other transcription machinery that then begins transcribing the target gene.
Again, using the yeast two-hybrid screen, two corepressors were isolated in rapid succession, nuclear receptor corepressor, or NCoR, in Geoff Rosenfeld's laboratory, [20] and silencing mediator of retinoid and thyroid receptors, or SMRT, by Ron Evans. [21]
54880 71458 Ensembl ENSG00000183337 ENSMUSG00000040363 UniProt Q6W2J9 Q8CGN4 RefSeq (mRNA) NM_001123383 NM_001123384 NM_001123385 NM_001130139 NM_017745 NM_020926 NM_001168321 NM_029510 NM_175044 NM_175045 NM_175046 RefSeq (protein) NP_001116855 NP_001116856 NP_001116857 NP_060215 NP_001161793 NP_083786 NP_778209 NP_778210 NP_778211 Location (UCSC) Chr X: 40.05 – 40.18 Mb Chr X: 11.9 – 12. ...
23186 217864 Ensembl ENSG00000089902 ENSMUSG00000037896 UniProt Q9UKL0 Q8CFE3 RefSeq (mRNA) NM_015156 NM_198023 RefSeq (protein) NP_055971 NP_932140 Location (UCSC) Chr 14: 102.59 – 102.73 Mb Chr 12: 111.01 – 111.08 Mb PubMed search Wikidata View/Edit Human View/Edit Mouse REST corepressor 1 also known as CoREST is a protein that in humans is encoded by the RCOR1 gene. Function This gene ...
Furthermore, the NRSF-NRSE complex recruits a transcriptional corepressor known as mSin3. [13] This leads to the activity of histone deacetylase in the region and the repression of the gene. Therefore, studies have revealed the correlation between REST/NRSF and RE1/NRSE in regulating the ANP gene expression in ventricular myocytes. A mutation ...
LCOR is a transcriptional corepressor widely expressed in fetal and adult tissues that is recruited to agonist-bound nuclear receptors through a single LxxLL motif, also referred to as a nuclear receptor (NR) box.