Alkali-stably bound proteins in eukaryotic and prokaryotic DNAs show common characteristics.
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Animals↗
Biomedical subjects
C Petzelt
Publications and source records attributed to C Petzelt.
Cyclic fluctuations of the mitotic Ca2+-ATPase during the cell cycle of the myxomycete Physarum polycephalum.
The occurrence of the mitotic Ca2+-ATPase, resembling the enzyme described for higher organisms, is demonstrated in multinuclear plasmodia of the myxomycete Physarum polycephalum. The activity of this enzyme undergoes cyclic fluctuations during the synchronous nuclear cycle with a minimum in early G2-phase and a maximum around the time of mitosis.
Calcium-Transporting ATPases↗
The mitotic Ca2+-adenosine triphosphatase in proliferating tissue of Vicia faba.
The mitotic Ca2+-ATPase was isolated from root tips of Vicia faba. The enzyme shows the same characteristics as the one isolated from a variety of animal cells. The results support the hypothesis that the membrane-bound mitotic Ca2+-ATPase is part of a Ca2+-regulating system universal for both plant and animal cells.
Calcium-Transporting ATPases↗
Biochemistry of the mitotic spindle.
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Actins↗
Synthesis and activation of mitotic Ca2+-adenosinetriphosphatase during the cell cycle of mouse mastocytoma cells.
The activity of a Ca2+-adenosinetriphosphatase (ATP phosphohydrolase, EC 3.6.1.3) increases during the mitotic phase of synchronized mouse mastocytoma P-815X2 cells. The enzyme is synchronized mouse mastocytoma P-815X2 cells. The enzyme is synthesized mainly during a distinct period of the interphase and is activated at mitosis. It is thought to regulate the formation of the mitotic apparatus by controlling the concentration of Ca2+ ions at the site of formation of the mitotic spindle.
Adenosine Triphosphatases↗
NH3-treatment of unfertilized sea urchin eggs turns on the Ca2+-ATPase cycle.
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Adenosine Triphosphatases↗
UV-irradiation of sea urchin eggs changes the course of the Ca2+-activated ATPase activity.
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Adenosine Triphosphatases↗
Ca2+-stimulated ATPase during the early development of parthenogenetically activated eggs of the sea urchin Paracentrotus lividus.
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Adenosine Triphosphatases↗
A Ca-activated ATPase in the mitotic apparatus of the sea urchin egg (isolated by a new method).
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Adenosine Triphosphatases↗
Ca 2+ -activated APTase during the cell cycle of the sea urchin Strongylocentrotus purpuratus.
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Adenosine Triphosphatases↗
Further evidence that a Ca 2+ -activated ATPase is connected with the cell cycle.
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Adenosine Triphosphatases↗
[RNA and protein synthesis in the course of spermatocyte divisions of Pales ferruginea (Nematocera)].
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Autoradiography↗
[Synthesis and deposition of yolk proteins in Gryllus domesticus].
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Animals↗
[Release of non-serogeneous proteins from the differentiated CNS of teleostei into the CSF].
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Animals↗
Inhibition of mitosis by an antibody to the mitotic calcium transport system.
Calcium ions are important in the regulation of mitotic apparatus assembly and in the control of chromosome movement. Changes in intracellular free calcium concentration, [Ca2+]i are achieved by an intracellular calcium-transport system which is highly conserved in different cell types. A membrane-bound protein of relative molecular mass (Mr) 46,000 (46K) is part of this transport system and has been implicated in the regulation of the [Ca2+]i changes associated with the course of mitosis. A monoclonal antibody against this 46K protein inhibits Ca2+-uptake into isolated Ca2+-sequestering membranes and specifically labels membranes associated with the mitotic apparatus of sea urchin embryos. Here we investigate the relationship between the intracellular calcium transport system and mitosis by injection of this monoclonal antibody into living mitotic sea urchin embryos. We find that after injection the intracellular free calcium increases up to 10(-6) M, the mitotic apparatus is rapidly destroyed and the cell is irreversibly blocked in its development.
Animals↗