| Primary Identifier | IPR037854 | Type | Family |
| Short Name | HCF1 |
| description | Host cell factor 1 (HCFC1) is associated with the activation and repression of gene expression. It is brought to specific promoters by association with DNA-sequence-specific transcription factors such as Sp1, GABP, YY1, Ronin/THAP11, and E2F1 and E2F4 []. HCFC1 recruits and is a part of several different complexes, including the SET1 histone methyltransferase complex (transcription activation), the SIN3 histone deacetylase complex (transcription repression) [], the THAP1/THAP3-HCFC1-OGT complex (required for the regulation of the transcriptional activity of RRM1) [], and the NSL complex (acetylation of nucleosomal histone H4) []. This entry includes mammalian HCFC1 and the Drosophila homologue, dHCF. They undergo a process of proteolytic maturation to produce a heterodimeric complex of HCF-N and HCF-C subunits, by different enzymes, O-GlcNAc transferase and taspase1, respectively [, ]. They share a Kelch domain, regions biased for basic (Basic) or acidic (Acidic) amino acids, fibronectin type 3 repeats, and a nuclear localization signal [].During human herpes simplex virus infection, HCFC1 forms a multiprotein-DNA complex enabling transcription of the virus's early genes []. It is also a co-activator of EGR2/Krox20 []and the GA-binding protein GABP2 [], and represses ZBTB17/Miz-1 []. |
