a widely expressed, sequence-specific DNA-binding transcriptional regulator, insulator, and organizer of higher-order chromatin structure. Acts as a tumor suppressor. Contains 11 C2H2-type zinc fingers. Involved in promoter activation or repression, hormone-responsive gene silencing, methylation-dependent chromatin insulation, and genomic imprinting. Mediates pairing between X chromosomes and interactions between distant regulatory elements. Binds to promoters of c-myc, PLK, PIM1 and APP. A critical regulator of cell-cycle arrest and death after B cell receptor signaling in immature B cells. CTCF, together with YY1 and Tsix, form a regulated epigenetic switch for X-inactivation. Note: This description may include information from UniProtKB.
Protein type: C2H2-type zinc finger protein; Transcription factor
Cellular Component: nucleoplasm; nucleolus; condensed chromosome; nucleus; chromosome, pericentric region
Molecular Function: protein binding; zinc ion binding; sequence-specific DNA binding; chromatin insulator sequence binding; transcription factor activity; transcription corepressor activity
Biological Process: genetic imprinting; maintenance of DNA methylation; transcription, DNA-dependent; positive regulation of transcription, DNA-dependent; regulation of histone methylation; regulation of histone acetylation; chromatin modification; negative regulation of transcription from RNA polymerase II promoter; regulation of gene expression, epigenetic; nucleosome positioning; chromosome segregation; regulation of molecular function, epigenetic; negative regulation of transcription, DNA-dependent
SS: The number of records in which this modification site was determined using site-specific methods. SS methods include amino acid sequencing, site-directed mutagenesis, modification site-specific antibodies, specific MS strategies, etc.