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Preparation of centralspindlin as an active heterotetramer of kinesin and GTPase activating protein subunits for in vitro structural and functional assays

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Mishima, Masanori (2017) Preparation of centralspindlin as an active heterotetramer of kinesin and GTPase activating protein subunits for in vitro structural and functional assays. In: Echard, Arnaud , (ed.) Cytokinesis. Elsevier , pp. 371-385. ISBN 9780128096734

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Official URL: http://dx.doi.org/10.1016/bs.mcb.2016.04.005

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Abstract

Centralspindlin is a crucial regulator of animal cytokinesis, consisting of MKLP1 kinesin-6 and CYK4 Rho-family GTPase activating protein (RhoGAP). As a microtubulebundling protein, it plays a crucial role in the formation of the central spindle. Through distinct accumulation to the anti-parallel microtubule overlaps at the central spindle and
the midbody, it recruits various downstream factors to the site of cell division as well as anchors the plasma membrane to maintain the narrow intercellular channels between the daughter cells until their final separation (abscission). A unique and functionally important feature of centralspindlin as a kinesin-containing protein complex is that the non-motor component, CYK4, is not a passive cargo of the MKLP1 motor, but an integrated component of a microtubule-organizing machinery. Thus, for in vitro structural and functional assays, it is pivotal to prepare active stoichiometric complexes
of the two components. Here I discuss two complimentary approaches, 1) reconstitution of the complex in bacterial extracts (in extract reconstitution) and 2) purification of a 3 native complex from a mammalian cell line using a localization and affinity purification
(LAP) tag.

Item Type: Book Item
Divisions: Faculty of Science, Engineering and Medicine > Medicine > Warwick Medical School > Biomedical Sciences
Faculty of Science, Engineering and Medicine > Medicine > Warwick Medical School
Publisher: Elsevier
ISBN: 9780128096734
ISSN: 0091679X
Book Title: Cytokinesis
Editor: Echard, Arnaud
Official Date: 6 May 2017
Dates:
DateEvent
6 May 2017Published
Volume: 137
Page Range: pp. 371-385
DOI: 10.1016/bs.mcb.2016.04.005
Status: Peer Reviewed
Publication Status: Published
Date of first compliant deposit: 17 January 2017

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