Recursos de colección

ARCA - Access to Research and Communication Annals - IGC Repository (649 recursos)

The Institutional Repository of Instituto Gulbenkian de Ciência, developed under the project RCAAP, is intended to collect, preserve and promote open access to the intellectual production of their researchers.

Physical Principles of Nuclear Division

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  1. Robust gap repair in the contractile ring ensures timely completion of cytokinesis

    Silva, Ana M; Osório, Daniel S; Pereira, Antonio J; Maiato, Helder; Pinto, Inês Mendes; Rubinstein, Boris; Gassmann, Reto; Telley, Ivo Andreas; Carvalho, Ana Xavier
    Cytokinesis in animal cells requires the constriction of an actomyosin contractile ring, whose architecture and mechanism remain poorly understood. We use laser microsurgery to explore the biophysical properties of constricting rings in Caenorhabditis elegans embryos. Laser cutting causes rings to snap open. However, instead of disintegrating, ring topology recovers and constriction proceeds. In response to severing, a finite gap forms and is repaired by recruitment of new material in an actin polymerization-dependent manner. An open ring is able to constrict, and rings repair from successive cuts. After gap repair, an increase in constriction velocity allows cytokinesis to complete at the...
    - 14-ene-2017

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