Bipolar localization of a chromosome partition protein in Bacillus subtilis
AUTOR(ES)
Lin, Daniel Chi-Hong
FONTE
The National Academy of Sciences of the USA
RESUMO
We have determined the subcellular localization of the chromosome partition protein Spo0J of Bacillus subtilis by immunofluorescence microscopy and visualizing fluorescence of a Spo0J–GFP fusion protein. Spo0J was associated with a region of the nucleoid proximal to the cell pole, both in growing cells dividing symmetrically and in sporulating cells dividing asymmetrically. Additional experiments indicated that Spo0J was bound to sites in the origin-proximal third of the chromosome. These results show that the replicating chromosomes are oriented in a specific manner during the division cycle, with the Spo0J binding region positioned toward the cell poles. Experiments characterizing cells at different stages of the cell cycle showed that chromosome orientation is established prior to the initiation of cell division. Our results indicate that there is a mechanism for orienting the chromosomes and that the chromosome partition protein Spo0J might be part of a bacterial mitotic-like apparatus.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=20791Documentos Relacionados
- Bipolar localization of Bacillus subtilis topoisomerase IV, an enzyme required for chromosome segregation
- Subcellular Localization of Bacillus subtilis SMC, a Protein Involved in Chromosome Condensation and Segregation
- Subcellular Localization of a Small Sporulation Protein in Bacillus subtilis
- Immunocytochemical Localization of a Calmodulinlike Protein in Bacillus subtilis Cells
- Localization of Spore Markers on the Chromosome of Bacillus subtilis