Chromosome fragments possessing only one kinetochore can congress to the spindle equator.
Chromosome fragments possessing only one kinetochore can congress to the spindle equator.
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DOI:
10.1083/jcb.136.2.229
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发表时间:
1997-01-27
影响因子:
7.8
通讯作者:
Rieder, CL
中科院分区:
文献类型:
--
作者:
Khodjakov, A;Cole, RW;McEwen, BF;Buttle, KF;Rieder, CL
We used laser microsurgery to cut between the two sister kinetochores on bioriented prometaphase chromosomes to produce two chromosome fragments containing one kinetochore (CF1K). Each of these CF1Ks then always moved toward the spindle pole to which their kinetochores were attached before initiating the poleward and away-from-the-pole oscillatory motions characteristic of monooriented chromosomes. CF1Ks then either: (a) remained closely associated with this pole until anaphase (50%), (b) moved (i.e., congressed) to the spindle equator (38%), where they usually (13/19 cells) remained stably positioned throughout the ensuing anaphase, or (c) reoriented and moved to the other pole (12%). Behavior of congressing CF1Ks was indistinguishable from that of congressing chromosomes containing two sister kinetochores. Three-dimensional electron microscopic tomographic reconstructions of CF1Ks stably positioned on the spindle equator during anaphase revealed that the single kinetochore was highly stretched and/or fragmented and that numerous microtubules derived from the opposing spindle poles terminated in its structure. These observations reveal that a single kinetochore is capable of simultaneously supporting the function of two sister kinetochores during chromosome congression and imply that vertebrate kinetochores consist of multiple domains whose motility states can be regulated independently.
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DOI:
10.1083/jcb.122.4.859
发表时间:
1993-08
期刊:
The Journal of cell biology
影响因子:
--
作者:
Skibbens RV;Skeen VP;Salmon ED
通讯作者:
Salmon ED
影响因子:
3.7
作者:
HENEEN, WK
通讯作者:
HENEEN, WK
影响因子:
7.8
作者:
Khodjakov, A;Rieder, CL
通讯作者:
Rieder, CL
影响因子:
7.8
作者:
RIEDER, CL;COLE, RW;KHODJAKOV, A;SLUDER, G
通讯作者:
SLUDER, G
影响因子:
7.8
作者:
RIEDER, CL;SCHULTZ, A;SLUDER, G
通讯作者:
SLUDER, G