PA1-852 detects KAP-1 (Kruppel-associated box-associated protein 1) in human, mouse and rat samples.
PA1-852 has been successfully used in Western blot, ICC/IF and IHC (P) procedures. By Western blot, this antibody detects an ~87 kDa protein representing recombinant human KAP-1. This antibody also detects a smaller protein that is believed to be KAP-1 degradation product. In immunofluorescent applications, this antibody primarily reacts with mouse or rat and shows non-specific staining in HeLa cells.
The PA1-852 antigen is a recombinant human KAP-1.
The KRAB (Kruppel-associated box) domain is minimally about 45 amino acids in length and is a transcriptional repression domain found in numerous transcription factors. There have been identified over 220 KRAB-zinc finger protein (KRAB-ZFP) genes in the human genome. These proteins functionally repress transcription via specific interactions with KAP-1 (KRAB-associated protein 1). KAP-1 is an 835 amino acid polypeptide that contains a RING finger, B boxes, and a PHD finger. KAP-1 has been shown to form complexes with KRAB-domain transcription factors and increase the efficiency with which they mediate repression. KAP-1 has also been shown to directly interact with HP1 (heterochromatin protein 1) and KRAZ1 (Kruppel-associated box-containing zinc finger protein 1). KAP-1 directly targets KRAZ1 to the foci of centromeric heterochromatin containing HP1alpha, thus helping to regulate transcriptional repression. Recent studies have shown that KAP-1 mutants with the ability to bind KRAB but unable to bind HP1 leads to random distribution of KRAZ1 and strong transcriptional activation.
For Research Use Only. Not for use in diagnostic procedures. Not for resale without express authorization.
Protein Aliases: E3 SUMO-protein ligase TRIM28; KAP-1; KRAB [Kruppel-associated box domain]-associated protein 1; KRAB-A-interacting protein; KRAB-Associated Protein 1; KRAB-interacting protein 1; KRIP-1; Kruppel-Associated Box-Associated Protein 1; Nuclear corepressor KAP-1; protein phosphatase 1, regulatory subunit 157; RING finger protein 96; RING-type E3 ubiquitin transferase TIF1-beta; TIF1-beta; Transcription intermediary factor 1-beta; transcriptional intermediary factor 1, beta; transcriptional intermediary factor 1-beta; tripartite motif protein 28; Tripartite motif-containing protein 28
Gene Aliases: AA408787; KAP-1; KAP1; KRIP-1; Krip1; MommeD9; PPP1R157; RNF96; TF1B; TIF1B; Tif1beta; TRIM28