Document Detail


Dynamic behavior of Nuf2-Hec1 complex that localizes to the centrosome and centromere and is essential for mitotic progression in vertebrate cells.
MedLine Citation:
PMID:  12829748     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Nuf2 and Hec1 are evolutionarily conserved centromere proteins. To clarify the functions of these proteins in vertebrate cells, we characterized them in chicken DT40 cells. We generated GFP fusion constructs of Nuf2 and Hec1 to examine in detail the localization of these proteins during the cell cycle. We found that Nuf2 is associated with Hec1 throughout the cell cycle and that this complex is localized to the centrosomes during G1 and S phases and then moves through the nuclear membrane to the centromere in G2 phase. During mitosis, this complex is localized to the centromere. We also created conditional loss-of-function mutants of Nuf2 and Hec1. In both mutants, the cell cycle arrested at prometaphase, suggesting that the Nuf2-Hec1 complex is essential for mitotic progression. The inner centromere proteins CENP-A, -C, and -H and checkpoint protein BubR1 were localized to chromosomes in the mutant cells arrested at prometaphase, but Mad2 localization was abolished. Furthermore, photobleaching experiments revealed that the Nuf2-Hec1 complex is stably associated with the centromere and that interaction of this complex with the centrosome is dynamic.
Authors:
Tetsuya Hori; Tokuko Haraguchi; Yasushi Hiraoka; Hiroshi Kimura; Tatsuo Fukagawa
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2003-06-26
Journal Detail:
Title:  Journal of cell science     Volume:  116     ISSN:  0021-9533     ISO Abbreviation:  J. Cell. Sci.     Publication Date:  2003 Aug 
Date Detail:
Created Date:  2003-07-14     Completed Date:  2004-05-19     Revised Date:  2009-11-19    
Medline Journal Info:
Nlm Unique ID:  0052457     Medline TA:  J Cell Sci     Country:  England    
Other Details:
Languages:  eng     Pagination:  3347-62     Citation Subset:  IM    
Affiliation:
PRESTO, The Japan Science and Technology Corporation, National Institute of Genetics and The Graduate University for Advanced Studies, Mishima, Shizuoka 411-8540, Japan.
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MeSH Terms
Descriptor/Qualifier:
Animals
Autoantigens / genetics,  metabolism
Calcium-Binding Proteins / genetics,  metabolism
Cell Cycle Proteins*
Cells, Cultured
Centromere / genetics,  metabolism*
Centrosome / metabolism*
Chickens
Chromosomal Proteins, Non-Histone / genetics,  metabolism
Chromosomes / genetics,  metabolism
Cloning, Molecular
Fluorescence Recovery After Photobleaching
Fungal Proteins / genetics,  metabolism*
G1 Phase / genetics,  physiology
G2 Phase / genetics,  physiology
Immunohistochemistry
In Situ Hybridization, Fluorescence
Metaphase / genetics,  physiology
Mutation
Nuclear Proteins / genetics,  metabolism*
Protein Kinases / genetics,  metabolism
Protein-Serine-Threonine Kinases
Repressor Proteins
S Phase / genetics,  physiology
Chemical
Reg. No./Substance:
0/Autoantigens; 0/CENPH protein, human; 0/Calcium-Binding Proteins; 0/Cell Cycle Proteins; 0/Chromosomal Proteins, Non-Histone; 0/Fungal Proteins; 0/MAD2L1 protein, human; 0/NDC80 protein, human; 0/NUF2 protein, human; 0/Nuclear Proteins; 0/Repressor Proteins; 0/centromere protein A; 0/centromere protein C; EC 2.7.-/Protein Kinases; EC 2.7.11.1/Bub1 spindle checkpoint protein; EC 2.7.11.1/Protein-Serine-Threonine Kinases

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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