Cdk11 is a RanGTP-dependent microtubule stabilization factor that regulates spindle assembly rate
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منابع مشابه
Cdk11 is a RanGTP-dependent microtubule stabilization factor that regulates spindle assembly rate
Production of Ran-guanosine triphosphate (GTP) around chromosomes induces local nucleation and plus end stabilization of microtubules (MTs). The nuclear protein TPX2 is required for RanGTP-dependent MT nucleation. To find the MT stabilizer, we affinity purify nuclear localization signal (NLS)-containing proteins from Xenopus laevis egg extracts. This NLS protein fraction contains the MT stabili...
متن کاملCHD4 Is a RanGTP-Dependent MAP that Stabilizes Microtubules and Regulates Bipolar Spindle Formation
BACKGROUND Production of the GTP-bound form of the Ran GTPase (RanGTP) around chromosomes induces spindle assembly by activating nuclear localization signal (NLS)-containing proteins. Several NLS proteins have been identified as spindle assembly factors, but the complexity of the process led us to search for additional proteins with distinct roles in spindle assembly. RESULTS We identify a ch...
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The roles of the kinase Aurora A (AurA) in centrosome function and spindle assembly have been established in Drosophila, C. elegans, and Xenopus egg extracts . Recently, we have shown that AurA acts downstream of the RanGTPase signaling pathway to stimulate spindle assembly in mitosis . However, it is still not clear whether AurA can stimulate the formation of microtubule organizing centers (MT...
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We isolated a cDNA clone encoding a kinesin-related protein, which we named XKCM1. Antibodies to XKCM1 stain mitotic centromeres and spindle poles. Immunodepletion and antibody addition experiments in an in vitro spindle assembly assay show that XKCM1 is required for both establishment and maintenance of mitotic spindles. The structures that form in the absence of XKCM1 contain abnormally long ...
متن کاملThe Chromosomal Passenger Complex Is Required for Chromatin-Induced Microtubule Stabilization and Spindle Assembly
In cells lacking centrosomes, such as those found in female meiosis, chromosomes must nucleate and stabilize microtubules in order to form a bipolar spindle. Here we report the identification of Dasra A and Dasra B, two new components of the vertebrate chromosomal passenger complex containing Incenp, Survivin, and the kinase Aurora B, and demonstrate that this complex is required for chromatin-...
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ژورنال
عنوان ژورنال: Journal of Cell Biology
سال: 2008
ISSN: 1540-8140,0021-9525
DOI: 10.1083/jcb.200706189