Condensin-2 complex subunit D3 (NCAPD3)

Regulatory subunit of the condensin-2 complex, a complex which establishes mitotic chromosome architecture and is involved in physical rigidity of the chromatid axis (PubMed:14532007). May promote the resolution of double-strand DNA catenanes (intertwines) between sister chromatids.

Condensin-mediated compaction probably increases tension in catenated sister chromatids, providing directionality for type II topoisomerase- mediated strand exchanges toward chromatid decatenation. Specifically required for decatenation of centromeric ultrafine DNA bridges during anaphase.