Function: Component of the MMS22L-TONSL complex, a complex that stimulates the recombination-dependent repair of stalled or collapsed replication forks. The MMS22L-TONSL complex is required to maintain genome integrity during DNA replication by promoting homologous recombination-mediated repair of replication fork-associated double-strand breaks. It may act by mediating the assembly of RAD51 filaments on ssDNA. Within the complex, may act as a scaffold. Ref.1 Ref.7 Ref.8 Ref.9
Subunit structure: Component of the MMS22L-TONSL complex, a complex at least composed of MMS22L and TONSL/NFKBIL2. Interacts with the MCM complex, the FACT complex and the RPA complex. Binds histones. Ref.7 Ref.8 Ref.9
Subcellular location: Cytoplasm. Nucleus. Note: Mainly nuclear. Localizes to DNA damage sites, accumulates at stressed replication forks. Ref.5 Ref.7 Ref.8
Tissue specificity: Expressed in heart, skeletal muscle and tracheal epithelial cells. Ref.1
Domain: The ANK repeats mediate the interaction with the MCM complex and histones, while the LRR repeats mediate the interaction with MMS22L. Ref.8
Sequence similarities: Belongs to the Tonsoku family.Contains 3 ANK repeats.Contains 7 LRR (leucine-rich) repeats.Contains 8 TPR repeats.
Caution: Was reported to share sequence similarities with IKBKB and therefore named 'NF-kappa-B inhibitor-like protein 2' (Ref.1). However, the sequence similarity is remote and effects as regulator of NF-kappa-B are probably indirect and require additional evidence (Ref.5).
Sequence caution: The sequence AAA85819.1 differs from that shown. Reason: Frameshift at several positions. The sequence AAH08782.1 differs from that shown. Reason: Erroneous initiation. Translation N-terminally extended.The sequence CAB63467.1 differs from that shown. Reason: Erroneous gene model prediction.
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