Division Gene (division + gene)

Distribution by Scientific Domains


Selected Abstracts


Coordination of DNA replication and cell division in Cyanobacteria Microcystis aeruginosa

FEMS MICROBIOLOGY LETTERS, Issue 1 2005
Takashi Yoshida
Abstract Little is known about the cyanobacterial cell cycle. When either nalidixic acid or hydroxyurea was added to a synchronized culture of Microcystis aeruginosa to block DNA replication, cell division did not occur. Furthermore, transcription of the essential cell division gene, ftsZ was repressed. After DNA replication, ftsZ transcription, as well as cell division, was not affected by hydroxyl urea, suggesting that the DNA replication and cell division of M. aeruginosa are coordinated and that this coordination is partly controlled by ftsZ transcription depending on DNA replication. [source]


Isolation of the plastid FtsZ gene from Cyanophora paradoxa (Glaucocystophyceae, Glaucocystophyta)

PHYCOLOGICAL RESEARCH, Issue 2 2005
Mayuko Sato
SUMMARY Plastids of glaucocystophytes are termed cyanelles and retain primitive features, such as a peptidoglycan wall. We isolated a full-length prokaryotic plastid division gene, FtsZ, from the glaucocystophyte alga Cyanophora paradoxa Korshikov (CpFtsZ-cy). CpftsZ-cy has a chloroplast-targeting signal at the N-teminus. Immunofluorescence microscopy showed that CpFtsZ-cy forms a ring-like structure at the division plane of cyanelles. [source]


Identification of cyanobacterial cell division genes by comparative and mutational analyses

MOLECULAR MICROBIOLOGY, Issue 1 2005
Shin-ya Miyagishima
Summary We performed comparative and mutational analyses to define more comprehensively the repertoire of genes involved in cyanobacterial cell division. Genes ftsE, ftsI, ftsQ, ftsW, and (previously recognized) ftsZ, minC, minD, minE and sulA were identified as homologues of cell division genes of Gram-negative and Gram-positive bacteria. Transposon mutagenesis of Synechococcus elongatus PCC 7942 identified five additional genes, cdv1, cdv2, cdv3, ftn6 and cikA, involved in cell division. cdv1 encodes a presumptive periplasmic peptidyl-prolyl cis - trans isomerase. cdv2 has similarity to ylmF which, like divIVA, lies within the Gram-positive bacterial ylm gene cluster whose members have functions associated with division. Conservation of other ylm genes in cyanobacteria suggests that cyanobacteria and Gram-positive bacteria share specific division proteins. Two ylm homologues are also found in algal and plant genomes. cdv3 has low but significant similarity to divIVA, suggesting that minE and cdv3 both mediate division-site determination in cyanobacteria. In contrast, Gram-positive bacteria lack minE, and (Gram-negative) proteobacteria lack divIVA. ftn6, of unknown function, and the circadian input kinase, cikA, are specific to cyanobacteria. In S. elongatus, unlike in other bacteria, FtsZ rings are formed at sites occupied by nucleoids. Thus, the division machinery of cyanobacteria differs in its composition and regulation from that of Gram-negative and Gram-positive bacteria. [source]