DCAF13
Developmental stage
Transiently expressed during four-cell to morula stages in embryo.
Function
Part of the small subunit (SSU) processome, first precursor of the small eukaryotic ribosomal subunit. During the assembly of the SSU processome in the nucleolus, many ribosome biogenesis factors, an RNA chaperone and ribosomal proteins associate with the nascent pre-rRNA and work in concert to generate RNA folding, modifications, rearrangements and cleavage as well as targeted degradation of pre-ribosomal RNA by the RNA exosome (PubMed:34516797). Participates in the 18S rRNA processing in growing oocytes, being essential for oocyte nonsurrounded nucleolus (NSN) to surrounded nucleolus (SN) transition (PubMed:30283081).
Substrate-recognition component of a DCX (DDB1-CUL4-X-box) E3 ubiquitin-protein ligase complex that plays a key role in embryo preimplantation and is required for normal meiotic cycle progression in oocytes (PubMed:16949367, PubMed:30111536, PubMed:31492966). Acts as a maternal factor that regulates oocyte and zygotic chromatin tightness during maternal to zygotic transition (By similarity). Also involved in the transformation of the endometrium into the decidua, known as decidualization, providing a solid foundation for implantation of blastocysts (PubMed:35932979). Recognizes the histone methyltransferases SUV39H1 and SUV39H2 and directs them to polyubiquitination and proteasomal degradation, which facilitates the H3K9me3 removal and early zygotic gene expression, essential steps for progressive genome reprogramming and the establishment of pluripotency during preimplantation embryonic development (PubMed:30111536). Supports the spindle assembly and chromosome condensation during oocyte meiotic division by targeting the polyubiquitination and degradation of PTEN, a lipid phosphatase that inhibits PI3K pathway as well as oocyte growth and maturation (PubMed:31492966). Targets PMP22 for polyubiquitination and proteasomal degradation (By similarity).
Pathway
Protein modification; protein ubiquitination.
Sequence Similarities
Belongs to the WD repeat DCAF13/WDSOF1 family.
Tissue Specificity
Expressed in the endometrium during decidualization. Expression is down-regulated in preeclampsia decidual tissues.
Cellular localization
- Nucleus
- Nucleolus
- In the nucleolus, localizes predominantly in the granular component, but also detected in the fibrillar center and dense fibrillar component.
Alternative names
WDSOF1, HSPC064, DCAF13, DDB1- and CUL4-associated factor 13, WD repeat and SOF domain-containing protein 1