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ECB-ART-30409
J Biochem 1978 May 01;835:1265-73. doi: 10.1093/oxfordjournals.jbchem.a132033.
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Inhibitory factor of microtubule assembly from sea urchin egg cortex. I. Preparation and characterization.

Naruse H , Sakai H .


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A new inhibitory factor of the microtubule (MT) assembly system was isolated from unfertilized sea urchin egg cortex. This factor not only suppressed spontaneous brain MT assembly, but also induced depolymerization of the reconstituted MTs. The factor did not suppress initial MT growth initiated by ciliary outer fiber fragments but the assembled MTs were soon depolymerized with time. The inhibitory activity was heat-stable but sensitive to trypsin or urea. The mode of the inhibition was distinct from the inhibitory effects of RNA on the MT assembly. The inhibitory factor partially purified on DEAE-Sephadex A-50 completely inhibited tubulin polymerization in a factor: tubulin ratio of 0.013.

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Genes referenced: LOC100887844 tubgcp2