Abstract:
:Phosphorylation of histone H3 serine 10 correlates with chromosome condensation and is required for normal chromosome segregation in Tetrahymena. This phosphorylation is dependent upon activation of the NIMA kinase in Aspergillus nidulans. NIMA expression also induces Ser-10 phosphorylation inappropriately in S phase-arrested cells and in the absence of NIMX(cdc2) activity. At mitosis, NIMA becomes enriched on chromatin and subsequently localizes to the mitotic spindle and spindle pole bodies. The chromatin-like localization of NIMA early in mitosis is tightly correlated with histone H3 phosphorylation. Finally, NIMA can phosphorylate histone H3 Ser-10 in vitro, suggesting that NIMA is a mitotic histone H3 kinase, perhaps helping to explain how NIMA promotes chromatin condensation in A. nidulans and when expressed in other eukaryotes.
journal_name
Celljournal_title
Cellauthors
De Souza CP,Osmani AH,Wu LP,Spotts JL,Osmani SAdoi
10.1016/s0092-8674(00)00035-0subject
Has Abstractpub_date
2000-08-04 00:00:00pages
293-302issue
3eissn
0092-8674issn
1097-4172pii
S0092-8674(00)00035-0journal_volume
102pub_type
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