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Hook domain found in nuclear mitotic apparatus protein (NuMA) and similar proteins NuMA, also called nuclear mitotic apparatus protein 1, or nuclear matrix protein-22 (NMP-22), or SP-H antigen, is a microtubule (MT)-binding protein that plays a role in the formation and maintenance of the spindle poles, and the alignment and segregation of chromosomes during mitotic cell division. The model corresponds to the N-terminal conserved globular Hook domain of NuMA, which folds as a variant of the helical calponin homology (CH) domain. It directly binds dynein light intermediate chains LIC1 and LIC2 through a conserved hydrophobic patch shared among other Hook adaptors.
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Jiyao W et al.(2023). "The conserved domain database in 2023.",