DDX1 Gene - DEAD-Box Helicase 1: Function, Mutations, and Disease Associations

DDX1 encodes a member of the DEAD-box helicase family, characterized by the conserved motif Asp-Glu-Ala-Asp (DEAD). This RNA helicase is involved in multiple aspects of RNA metabolism, including pre-mRNA splicing, ribosome biogenesis, RNA transport, and translation initiation. DDX1 also participates in DNA repair and transcriptional regulation. Overexpression and amplification of DDX1 are observed in several cancers, particularly neuroblastoma and breast cancer, where it may contribute to tumorigenesis and chemoresistance.

Tissue Expression

Cell Line Expression

Hotspot Mutations

Mutation functional classification

• Spliceosome (KEGG hsa03040)

• RNA transport (KEGG hsa03013)

• Ribosome biogenesis in eukaryotes (KEGG hsa03008)

• MYCN amplification pathway in neuroblastoma

DDX1 is a 740-amino acid DEAD-box RNA helicase that localizes to both nucleus and cytoplasm. It contains a conserved helicase core with ATP-binding and RNA unwinding domains, plus an N-terminal domain for protein-protein interactions. DDX1 facilitates RNA secondary structure remodeling during splicing, translation, and ribosome assembly. It also interacts with the retinoblastoma protein (RB1) and is implicated in DNA double-strand break repair via homologous recombination. In cancer, DDX1 amplification drives oncogenic RNA processing and stress adaptation.