Function
DDX11 is a DNA-dependent ATPase and ATP-dependent DNA helicase crucial for genomic stability. Its functions encompass DNA replication, repair, and heterochromatin organization, as well as ribosomal RNA synthesis. Specifically, it plays a role in repairing DNA double-strand breaks (DSBs) at replication forks during recovery from DNA damage. Furthermore, it regulates sister chromatid cohesion and mitotic chromosome segregation. DDX11 also stimulates the 5'-single-stranded DNA flap endonuclease activity of FEN1, independent of ATP and its helicase function. It contributes to heterochromatin organization and activates rRNA transcription by binding to hypomethylated rDNA gene loci, recruiting UBTF and RNA polymerase Pol I. This protein is also involved in embryonic development and associates with chromatin at DNA replication fork regions. Finally, DDX11 binds to both single- and double-stranded DNA.
Subcellular Location
Nucleus. Nucleus, nucleolus. Cytoplasm, cytoskeleton, spindle pole. Midbody. Cytoplasm, cytoskeleton, microtubule organizing center, centrosome.