MBD3L3 Gene: Function, Expression, and Disease Associations | Biomedical SEO

MBD3L3 is a protein-coding gene located on chromosome 19p13.2. It encodes a protein that belongs to the methyl-CpG-binding domain (MBD) family, which is involved in interpreting DNA methylation signals and regulating chromatin structure. MBD3L3 is a primate-specific gene that shares sequence similarity with MBD3, but lacks the conserved methyl-CpG-binding domain. It is thought to act as a transcriptional regulator, potentially modulating the activity of the NuRD (nucleosome remodeling and deacetylase) complex. Expression data suggest a restricted pattern, with notable levels in certain tissues and cell lines. While its full physiological role is still under investigation, MBD3L3 has been implicated in cancer biology, particularly in the context of tumor suppression and epigenetic dysregulation.

Tissue Expression

Cell Line Expression

Hotspot Mutations

Mutation functional classification

• Chromatin organization

• Transcriptional regulation by MBD proteins

• NuRD complex pathway (potential interaction)

The MBD3L3 protein is a 289-amino acid polypeptide with a molecular weight of approximately 33 kDa. It shares homology with MBD3 but lacks the methyl-CpG-binding domain, suggesting it does not directly bind methylated DNA. Instead, it may interact with other proteins, such as components of the NuRD complex, to modulate chromatin remodeling and gene expression. Structural predictions indicate a coiled-coil region that could mediate protein-protein interactions. Its expression is low in most tissues, but it is found in specific cell types, and its dysregulation has been observed in cancer, implying a role in epigenetic regulation and tumor suppression.