Wyniki wyszukiwania

1

Mechanical stress underlies accurate segregation of chromosomes in mitosis and meiosis

100%

Hejnowicz Z.

Prace Naukowe Uniwersytetu Śląskiego w Katowicach

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1998

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tom 1696

2

Preferential segregation of marker chromosomes 14 and 18 in mouse recombinant inbred strains derived from the KE and CBA-Kw strains

86%

Lenartowicz M., Wojcik A.

Folia Biologica

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1999

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tom 47

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nr 3-4

3

Correlation of centromeric heterochromatin C-band polymorphism with breeding failure in mice

72%

Marciniak M., Lenartowicz M., Golas A., Styrna J.

Folia Biologica

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2010

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tom 58

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nr 3-4

251-255

4

Bacterial chromosome segregation

72%

Bartosik A. A., Jagura-Burdzy G.

Acta Biochimica Polonica

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2005

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tom 52

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nr 1

In most bacteria two vital processes of the cell cycle: DNA replication and chromosome segregation overlap temporally. The action of replication machinery in a fixed location in the cell leads to the duplication of oriC regions, their rapid separation to the opposite halves of the cell and the duplicated chromosomes gradually moving to the same locations prior to cell division. Numerous proteins are implicated in co-replicational DNA segregation and they will be characterized in this review. The proteins SeqA, SMC/MukB, MinCDE, MreB/Mbl, RacA, FtsK/SpoIIIE playing different roles in bacterial cells are also involved in chromosome segregation. The chromosomally encoded ParAB homologs of active partitioning proteins of low-copy number plasmids are also players, not always indispensable, in the segregation of bacterial chromosomes.

5

Force generation by cellular motors

72%

Wanka F., Van Zoelen E. J. J.

Cellular and Molecular Biology Letters

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2003

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tom 08

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nr 4

Cell motility processes in non-muscle cells depend on the activity of motor proteins that bind to either microtubules or actin filaments. From presently available data it must be concluded that the driving force is generated by transient interaction of the respective motors with microtubules or actin filaments which then activates the binding and hydrolysis of ATP. This reaction results in an abrupt discharge of the motor molecule, the direction of which is determined by the spatial orientation of its binding to the helical and polar vehicle. The latter is thereby propelled in its length direction and simultaneously undergoes an axial rotation, while the expelled motor exerts an oppositely directed current in the surrounding fluid, comparable to jet propulsion. Force production, propulsion velocities and energy requirements known from in vitro studies comply with those derived from the theory. The theory opens new ways for the understanding of cellular activities such as particle transport, mitosis and morphodynamics.

6

Differences in the degree of inhibition of NDP reductase by chemical inactivation and by the thermosensitive mutation nrdA101 in Escherichia coli suggest an effect on chromosome segregation

72%

Riola J., Guarino E., Guzman E. C., Jimenez-Sanchez A.

Cellular and Molecular Biology Letters

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2007

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tom 12

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nr 1

NDP reductase activity can be inhibited either by treatment with hydroxyurea or by incubation of an nrdA ts mutant strain at the non-permissive temperature. Both methods inhibit replication, but experiments on these two types of inhibition yielded very different results. The chemical treatment immediately inhibited DNA synthesis but did not affect the cell and nucleoid appearance, while the incubation of an nrdA101 mutant strain at the non-permissive temperature inhibited DNA synthesis after more than 50 min, and resulted in aberrant chromosome segregation, long filaments, and a high frequency of anucleate cells. These phenotypes are not induced by SOS. In view of these results, we suggest there is an indirect relationship between NDP reductase and the chromosome segregation machinery through the maintenance of the proposed replication hyperstructure.

7

Anomalny powrot do kariotypow rodzicielskich w pokoleniu F2 mieszancow pszenzyta tetraploidalnego z zytem tetraploidalnym

44%

Lapinski B.

Biuletyn Instytutu Hodowli i Aklimatyzacji Roślin

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2003

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tom 228

131-139

Ograniczanie wyników

2 Cellular and Molecular Biology Letters

2 Folia Biologica

1 Acta Biochimica Polonica

1 Biuletyn Instytutu Hodowli i Aklimatyzacji Roślin

1 Prace Naukowe Uniwersytetu Śląskiego w Katowicach

2 Lenartowicz M.

1 Bartosik A. A.

1 Golas A.

1 Guarino E.

1 Guzman E. C.

1 Hejnowicz Z.

1 Jagura-Burdzy G.

1 Jimenez-Sanchez A.

1 Lapinski B.

1 Marciniak M.

1 Riola J.

1 Styrna J.

1 Van Zoelen E. J. J.

1 Wanka F.

1 Wojcik A.

1 2010

1 2007

1 2005

2 2003

1 1999