| Primary Identifier | IPR042534 | Type | Homologous_superfamily |
| Short Name | SAP18_sf |
| description | This superfamily includes several eukaryotic Sin3 associated polypeptide p18 (SAP18) sequences. SAP18 is known to be a component of the Sin3-containing complex which is responsible for the repression of transcription via the modification of histone polypeptides []. SAP18 (UBL domain) is one of the three three ASAP subunits (along with Acinus (β-hairpin motif) and RNPS1 (RRM domain)) that play a role in programmed cell death, transcriptional regulation, pre-mRNA splicing and mRNA quality control [, ]. The ASAP complex interacts with the exon-junction complex (EJC), a messenger ribonucleoprotein complex involved in post-transcriptional regulation [].The high degree of evolutionary conservation and the fortuitous crystal contacts at the α-β groove suggest that this surface of SAP18 is a hot spot for interactions. Possible binding partners targeting this surface of SAP18 are transcription factors (such as Bicoid and Kruppel) and/or Sin3a-HDAC subunits. |
