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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 
 

Greatwall kinase: a nuclear protein required for proper chromosome condensation and mitotic progression in Drosophila.

Mutations in the Drosophila gene greatwall cause improper chromosome condensation and delay cell cycle progression in larval neuroblasts. Chromosomes are highly undercondensed, particularly in the euchromatin, but nevertheless contain phosphorylated histone H3, condensin, and topoisomerase II. Cells take much longer to transit the period of chromosome condensation from late G2 through nuclear envelope breakdown. Mutant cells are also subsequently delayed at metaphase, due to spindle checkpoint activity. These mutant phenotypes are not caused by spindle aberrations, by global defects in chromosome replication, or by activation of a caffeine-sensitive checkpoint. The Greatwall proteins in insects and vertebrates are located in the nucleus and belong to the AGC family of serine/threonine protein kinases; the kinase domain of Greatwall is interrupted by a long stretch of unrelated amino acids.[1]

References

  1. Greatwall kinase: a nuclear protein required for proper chromosome condensation and mitotic progression in Drosophila. Yu, J., Fleming, S.L., Williams, B., Williams, E.V., Li, Z., Somma, P., Rieder, C.L., Goldberg, M.L. J. Cell Biol. (2004) [Pubmed]
 
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