Chromosome segregation during mitosis is mediated by spindle microtubules that attach to chromosomal kinetochores with strong yet labile links. The exact molecular composition of the kinetochore-microtubule interface is not known but microtubules are thought to bind to kinetochores via the specialized microtubule-binding sites, which contain multiple microtubule-binding proteins. During prometa...

We report on a young boy with neurodevelopmental disorder who is carrier of novel frameshift mutation in gene MAP7D3 (MAP7 domain containing 3) Xq26.3. The protein encoded by this belongs to the MAP7 (microtubuleassociated 7) family that proposed regulate kinesin-1 (KIF5B)-dependent intracellular transport, acting as Microtubule (MT)-tethered recruitment factors and activators kinesin [1-3]. An...

Microtubule dynamics vary during the cell cycle, and microtubules appear to be more dynamic in vivo than in vitro. Proteins that promote dynamic instability are therefore central to microtubule behavior in living cells. Here, we report that a yeast protein of the highly conserved EB1 family, Bim1p, promotes cytoplasmic microtubule dynamics specifically during G1. During G1, microtubules in cell...

Microtubules have been an attractive target of cancer drug discovery due to their highly dynamic nature during mitosis. Griseofulvin, a natural antifungal compound, is known interfere with microtubule dynamics. In the present study, we prepared and analyzed twenty-seven novel griseofulvin derivatives. Three these compounds had GI50 values <10 ?M (5.74 9.7 ?M) in breast cell line CAL-51. The mos...

The haploid microspore division during pollen development in flowering plants is an intrinsically asymmetric division which establishes the male germline for sexual reproduction. Arabidopsis gem1 mutants lack the male germline as a result of disturbed microspore polarity, division asymmetry, and cytokinesis and represent loss-of-function mutants in MOR1/GEM1, a plant orthologue of the conserved...

Mitotic apparatus isolated from sea urchin eggs has been treated with meralluride sodium under conditions otherwise resembling those of its isolation. The treatment causes a selective morphological disappearance of microtubules while extracting a major protein fraction, probably consisting of two closely related proteins, which constitutes about 100/0 of mitotic apparatus protein . Extraction o...

Evidence is presented that the "22S protein" of mitotic apparatus isolated from sea urchin eggs is not microtubule protein. An antibody preparation active against 22S protein is described, and immunochemical studies of the distribution of 22S protein in various cellular fractions and among morphological features of mitotic apparatus are reported. The protein is ubiquitous in the metaphase egg f...

Introduction During proliferative plant cell division, the new wall, called plate, is first built in middle of and then expands outward to complete cytokinesis. This dynamic process requires coordinated movement arrangement cytoskeleton organelles. Methods Here we use live-cell markers track reorganization microtubules, nuclei, endoplasmic reticulum, endomembrane compartments during division fo...