DAXX Antibody – Rabbit Polyclonal

This gene encodes a multifunctional protein that resides in multiple locations in the nucleus and in the cytoplasm. It interacts with a wide variety of proteins, such as apoptosis antigen Fas, centromere protein C, and transcription factor erythroblastosis virus E26 oncogene homolog 1. In the nucleus, the encoded protein functions as a potent transcription repressor that binds to sumoylated transcription factors. Its repression can be relieved by the sequestration of this protein into promyelocytic leukemia nuclear bodies or nucleoli. This protein also associates with centromeres in G2 phase. In the cytoplasm, the encoded protein may function to regulate apoptosis. The subcellular localization and function of this protein are modulated by post-translational modifications, including sumoylation, phosphorylation and polyubiquitination. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Nov 2008]

DAXX: a transcriptional co-regulatory protein. Proposed to mediate activation of the JNK pathway and apoptosis via ASK1 in response to signaling from FAS and TGF-betaR2. Glucose deprivation activates the ASK1-SEK1-JNK1-HIPK1 pathway, relocalizing Daxx from the nucleus to the cytoplasm, where Daxx binds to ASK1, and subsequently leads to ASK1 oligomerization. Interaction with HSP27 may prevent interaction with TGF-betaR2 and ASK1 and block DAXX-mediated apoptosis. Seems to act as a transcriptional co- repressor and inhibits PAX3 and ETS1 through direct protein- protein interaction. Its transcription repressor activity is modulated by recruiting it to subnuclear compartments like the nucleolus or PML/POD/ND10 nuclear bodies through interactions with MCSR1 and PML, respectively. Two alternatively spliced isoforms have been described.

Protein type: Nuclear receptor co-regulator; Apoptosis; Nucleolus; Transcription, coactivator/corepressor

Chromosomal Location of Human Ortholog: 6p21.3

Cellular Component: heterochromatin; PML body; cytoplasm; nucleolus; cytosol; nucleus; chromosome, pericentric region

Molecular Function: protein homodimerization activity; histone binding; p53 binding; protein N-terminus binding; protein kinase binding; transcription factor binding; protein binding; enzyme binding; androgen receptor binding; heat shock protein binding; ubiquitin protein ligase binding; receptor signaling protein activity; transcription corepressor activity; protein kinase activator activity

Biological Process: transcription, DNA-dependent; viral reproduction; apoptosis; regulation of protein ubiquitination; activation of JNK activity; chromatin remodeling; nucleosome assembly; induction of apoptosis via death domain receptors; regulation of transcription, DNA-dependent; cytokinesis after mitosis; positive regulation of protein kinase activity; androgen receptor signaling pathway; positive regulation of protein amino acid phosphorylation; negative regulation of transcription, DNA-dependent