Properties of the kinetochore in vitro. I. Microtubule nucleation and tubulin binding.

Properties of the kinetochore in vitro. I. Microtubule nucleation and tubulin binding.
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动力学在体外的特性。 I.微管成核和微管蛋白结合。

DOI:
10.1083/jcb.101.3.755
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发表时间:
1985-09
影响因子:
7.8
通讯作者:
KIRSCHNER, MW
KIRSCHNER, MW
中科院分区:
生物学1区
文献类型:
--
作者:
MITCHISON, TJ;KIRSCHNER, MW

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我们从用长春碱抑制有丝分裂的中国仓鼠卵巢细胞中分离出染色体,并在体外检查了它们的动粒与纯化的微管蛋白的相互作用。动粒使微管 (MT) 生长具有复杂的动力学。在初始滞后阶段之后,MT 连续成核,正端和负端均位于远端。这种混合极性似乎与体内有序、同极动粒纤维的形成不一致。当从长春花碱阻滞的细胞中分离出来时,动粒不含结合的微管蛋白。从秋水仙酰胺阻滞细胞中分离的染色体的着丝粒或在体外与微管蛋白一起孵育的染色体的着丝粒在抗微管蛋白免疫荧光后被明亮地染色。这种结合的微管蛋白可能不是 MT 的形式。通过免疫电子显微镜将其定位于冠区域,它可能在体外的 MT 成核中发挥作用。
We have isolated chromosomes from Chinese hamster ovary cells arrested in mitosis with vinblastine and examined the interactions of their kinetochores with purified tubulin in vitro. The kinetochores nucleate microtubule (MT) growth with complex kinetics. After an initial lag phase, MTs are continuously nucleated with both plus and minus ends distally localized. This mixed polarity seems inconsistent with the formation of an ordered, homopolar kinetochore fiber in vivo. As isolated from vinblastine-arrested cells, kinetochores contain no bound tubulin. The kinetochores of chromosomes isolated from colcemid- arrested cells or of chromosomes incubated with tubulin in vitro are brightly stained after anti-tubulin immunofluorescence. This bound tubulin is probably not in the form of MTs. It is localized to the corona region by immunoelectron microscopy, where it may play a role in MT nucleation in vitro.
DOI: 10.1083/jcb.84.1.151
发表时间: 1980-01
期刊: The Journal of cell biology
影响因子: --
作者:
Bergen LG;Kuriyama R;Borisy GG
通讯作者: Borisy GG
DOI: 10.1073/pnas.76.11.5759
发表时间: 1979-01-01
影响因子: 11.1
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DOI: 10.1083/jcb.100.4.1185
发表时间: 1985-04
影响因子: 7.8
作者:
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DOI: 10.1083/jcb.88.3.543
发表时间: 1981-03
期刊: The Journal of cell biology
影响因子: --
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DOI: 10.1007/bf00329772
发表时间: 1977-01-01
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影响因子: 1.6
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