Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0268318 (ICP)
 10,007 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Defects in chromosome condensation, segregation or cytokinesis during mitosis disrupt genome integrity and cause organismal death or tumorigenesis. The conserved kinase AIR-2/Aurora B is required for normal execution of all these important mitotic events in Caenorhabditis elegans. TLK-1 has been recently shown to be a substrate and activator of AIR-2 in the presence of another AIR-2 activator ICP-1/INCENP, and to cooperate with AIR-2 to ensure proper mitotic chromosome segregation. However, whether TLK-1 may contribute to chromosome condensation or cytokinesis is unclear. A time-lapse microscopy analysis showed that tlk-1 mutants are defective in chromosome condensation and cytokinesis, in addition to chromosome segregation, during mitosis. Our data indicate that TLK-1 contributes to chromosome condensation and segregation, at least in part, in a manner that is distinct from the ICP-1-mediated mechanism and does not involve loading AIR-2 or condensin proteins to mitotic chromosomes. Moreover, TLK-1 functions in cytokinesis by localizing AIR-2 to the midzone microtubules. The localization pattern of TLK-1 is different from those of ICP-1 and AIR-2, revealing differences in dynamic regulation and association of TLK-1 and ICP-1 towards AIR-2 in vivo. Interestingly, human TLK2 could functionally substitute for tlk-1, suggesting that the mitotic roles of TLK members might be evolutionarily conserved.
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PMID:Caenorhabditis elegans TLK-1 controls cytokinesis by localizing AIR-2/Aurora B to midzone microtubules. 2070 56