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Volumn 275, Issue 5304, 1997, Pages 1311-1314

APC-mediated proteolysis of Ase1 and the morphogenesis of the mitotic spindle

Author keywords

[No Author keywords available]

Indexed keywords

CELL CYCLE PROTEIN; CYCLINE; MUTANT PROTEIN;

EID: 0031055137     PISSN: 00368075     EISSN: None     Source Type: Journal    
DOI: 10.1126/science.275.5304.1311     Document Type: Article
Times cited : (217)

References (41)
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    • The rate of spindle disassembly was not different between cells containing GAL1::ASE1 and the control vector (19).
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    • DNA content was determined by flow cytometry (19).
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    • note
    • 35S-labeling and measurement of protein stability was done as described [D. Kornitzer, B. Raboy, R. G. Kulka, G. R. Fink, EMBO J. 13, 6021 (1994)]. Ase1 levels were quantitated with a phosphorimager and normalized to the zero time point. Experiments using Ase1 polyclonal antibodies demonstrated that the myc epitope did not alter the half-life of Ase1 or Ase1-db (19).
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    • note
    • Methods are as described (13). Cultures for pulse-chase analysis and flow cytometry were split before labeling, and the sample for flow cytometry was grown in parallel in identical medium containing unlabeled methionine.
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    • note
    • The half-life of Ase1 in cycling cells at 36°C is somewhat shorter than at 30°C (compare Fig. 1 B with Fig. 2A).
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    • note
    • The Ase1-db mutant was constructed by site-directed mutagenesis using an oligonucleotide of sequence 5′-CATGCAGTAAAACCAGCTCAGCTGGCTCCTATCCCGCTGGCTAAAGTCGACACTAAG-3′.
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    • note
    • We thank A. Amon, A. Murray, K. Nasmyth, and W. Zachariae for strains and plasmids; O. Cohen-Fix, D. Koshland, T. McGarry, K. Nasmyth, and W. Zachariae for communicating results before publication; A. Amon, O. Cohen-Fix, A. D'Andrea, G. Fink, M. Kirschner, D. Kornitzer, R. Li, and A. Murray for helpful discussions or reading of the manuscript; M. Young for statistical analysis; and D. Kornitzer for guidance with the pulse-chase experiments. D.P. is supported by a Damon Runyon Scholar Award, a Claudia Adams Barr Award, and funds to the Dana-Farber Cancer Institute in memory of Patrick McDonough.


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