ATRX: a global transcriptional regulator. Belongs to the SNF2 family of proteins, many of which modify gene expression via chromatin remodeling activity. Involved in the developmental silencing of imprinted genes in the brain. Contains one PxVxL motif, which is required for interaction with chromoshadow domains. This motif requires additional residues at -7, -6, +4 and +5 relative to the central V which contact the chromoshadow domain. Constitutive mutations in ATRX are associated with brain, facial, and genital abnormalities, and alpha thalassemia. Acquired mutations in ATRX have been observed in preleukemic conditions. Six alternatively spliced human isoforms have been described.
Protein type: EC 3.6.4.12; Helicase; Ubiquitin conjugating system; DNA repair, damage
Chromosomal Location of Human Ortholog: Xq21.1
Cellular Component: nucleoplasm; PML body; nuclear heterochromatin; nucleus
Molecular Function: DNA helicase activity; protein binding; DNA binding; zinc ion binding; histone binding; chromatin binding; helicase activity; DNA translocase activity; ATP binding; methylated histone residue binding
Biological Process: DNA damage response, signal transduction by p53 class mediator; transcription, DNA-dependent; positive regulation of telomere maintenance; DNA repair; Sertoli cell development; DNA duplex unwinding; replication fork processing; DNA recombination; chromatin remodeling; nucleosome assembly; regulation of transcription, DNA-dependent; DNA replication-independent nucleosome assembly; forebrain development; DNA methylation; positive regulation of transcription from RNA polymerase II promoter; spermatogenesis
Disease: Alpha-thalassemia/mental Retardation Syndrome, X-linked; Mental Retardation-hypotonic Facies Syndrome, X-linked, 1; Alpha-thalassemia Myelodysplasia Syndrome
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