Is actin involved in the nuclear division in Amoeba proteus?
During semi-open mitosis of Amoeba proteus the nuclear envelope is not dispersed and nucleus divides by fission. The presence of actin layer close to nuclear envelope was demonstrated in interphase and telophase nuclei of that amoeba stained with rhodamine labelled phalloidin. In telophase, an accumulation of actin arises in the space between the future daughter nuclei. It appears to be comparable with the contractile ring of dividing cells. This suggests that actin associated with the nuclear envelope of Amoeba proteus may be involved in final separation of the daughter nuclei, forming a constriction ring at the middle of dividing nucleus.
Pomorski
P
P
Department of Cell Biology, Nencki Institute of Experimental Biology, Warszawa, Poland.
Grebecka
L
L
D000199:Actins / Q000032:analysis*; D000656:Amoeba / Q000737:chemistry* / Q000648:ultrastructure; D000818:Animals; D002455:Cell Division; D002467:Cell Nucleus / Q000737:chemistry; D007399:Interphase; D009685:Nuclear Envelope / Q000737:chemistry; D010590:Phalloidine; D013692:Telophase
D000199:Actins; D010590:Phalloidine