Mitotic spindle morphogenesis: Ran on the microtubule cytoskeleton and beyond.

نویسندگان

  • B Goodman
  • Y Zheng
چکیده

Assembly and disassembly of the mitotic spindle are essential for both chromosome segregation and cell division. The small G-protein Ran has emerged as an important regulator of spindle assembly. In this review, we look at the role of Ran in different aspects of spindle assembly, including its effects on microtubule assembly dynamics and microtubule organization. In addition, we examine the possibility of a spindle matrix and the role Ran might play in such a structure.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Identification of a novel protein regulating microtubule stability through a chemical approach.

To identify novel proteins regulating the microtubule cytoskeleton, we screened a library of purine derivatives using mitotic spindle assembly in Xenopus egg extracts as an assay. Out of a collection of 1561 compounds, we identified 15 that destabilized microtubules without targeting tubulin directly, resulting in small spindles. Affinity chromatography with one compound, named diminutol, revea...

متن کامل

Ran Localizes around the Microtubule Spindle In Vivo during Mitosis in Drosophila Embryos

The GTPase Ran regulates multiple cellular functions throughout the cell cycle, including nucleocytoplasmic transport, nuclear membrane assembly, and spindle assembly. Ran mediates spindle assembly by affecting multiple spindle assembly pathways: microtubule dynamics, microtubule motor activity, and spindle pole assembly. Ran is predicted to facilitate spindle assembly by remaining in the GTP-b...

متن کامل

Hoxb1b controls oriented cell division, cell shape and microtubule dynamics in neural tube morphogenesis

Hox genes are classically ascribed to function in patterning the anterior-posterior axis of bilaterian animals; however, their role in directing molecular mechanisms underlying morphogenesis at the cellular level remains largely unstudied. We unveil a non-classical role for the zebrafish hoxb1b gene, which shares ancestral functions with mammalian Hoxa1, in controlling progenitor cell shape and...

متن کامل

Spatial organization of the Ran pathway by microtubules in mitosis.

Concentration gradients of soluble proteins are believed to be responsible for control of morphogenesis of subcellular systems, but the mechanisms that generate the spatial organization of these subcellular gradients remain poorly understood. Here, we use a newly developed multipoint fluorescence fluctuation spectroscopy technique to study the ras-related nuclear protein (Ran) pathway, which fo...

متن کامل

Mechanisms and Molecules of the Mitotic Spindle

In all eukaryotes, morphogenesis of the microtubule cytoskeleton into a bipolar spindle is required for the faithful transmission of the genome to the two daughter cells during division. This process is facilitated by the intrinsic polarity and dynamic properties of microtubules and involves many proteins that modulate microtubule organization and stability. Recent work has begun to uncover the...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • Biochemical Society transactions

دوره 34 Pt 5  شماره 

صفحات  -

تاریخ انتشار 2006