PMID- 10652275 OWN - NLM STAT- MEDLINE DCOM- 20000225 LR - 20181113 IS - 0890-9369 (Print) IS - 0890-9369 (Linking) VI - 14 IP - 2 DP - 2000 Jan 15 TI - Dynamic organization of chromosomal DNA in Escherichia coli. PG - 212-23 AB - We have revealed the subcellular localization of different DNA segments that are located at approximately 230-kb intervals on the Escherichia coli chromosome using fluorescence in situ hybridization (FISH). The series of chromosome segments is localized within the cell in the same order as the chromosome map. The large chromosome region including oriC shows similar localization patterns, which we call the Ori domain. In addition, the localization pattern of the large segment including dif is characteristic of the replication terminus region. The segment also shows similar localization patterns, which we call the Ter domain. In newborn cells, Ori and Ter domains of the chromosome are differentially localized near opposite cell poles. Subsequently, in the B period, the Ori domain moves toward mid-cell before the initiation of replication, and the Ter domain tends to relocate at mid-cell. An inversion mutant, in which the Ter domain is located close to oriC, shows abnormal subcellular localization of ori and dif segments, resulting in frequent production of anucleate cells. These studies thus suggest that the E. coli chromosome is organized to form a compacted ring structure with the Ori and Ter domains; these domains participate in the cell cycle-dependent localization of the chromosome. FAU - Niki, H AU - Niki H AD - "Unit Process and Combined Circuit," PRESTO, Japan Science and Technology Corporation (JST), Kumamoto, 862-0976, Japan. niki@gpo.kumamoto-u.ac.jp FAU - Yamaichi, Y AU - Yamaichi Y FAU - Hiraga, S AU - Hiraga S LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Genes Dev JT - Genes & development JID - 8711660 RN - 0 (DNA, Bacterial) SB - IM MH - Cell Division/genetics MH - Cell Nucleus/genetics MH - Chromosome Inversion MH - Chromosome Mapping MH - Chromosomes, Bacterial/*genetics MH - DNA Replication/genetics MH - DNA, Bacterial/*metabolism MH - Escherichia coli/cytology/*genetics MH - Mutation/genetics MH - Replication Origin/genetics MH - Subcellular Fractions/metabolism PMC - PMC316355 EDAT- 2000/02/01 09:00 MHDA- 2000/03/04 09:00 PMCR- 2000/07/15 CRDT- 2000/02/01 09:00 PHST- 2000/02/01 09:00 [pubmed] PHST- 2000/03/04 09:00 [medline] PHST- 2000/02/01 09:00 [entrez] PHST- 2000/07/15 00:00 [pmc-release] PST - ppublish SO - Genes Dev. 2000 Jan 15;14(2):212-23.