Physical and genetic characterization of the genome of Magnetospirillum magnetotacticum , strain MS-1
2001; Elsevier BV; Volume: 264; Issue: 2 Linguagem: Inglês
10.1016/s0378-1119(01)00331-6
ISSN1879-0038
AutoresL. Elizabeth Bertani, Juliani Weko, Khristie V Phillips, Rachel F. Gray, Joseph L. Kirschvink,
Tópico(s)Geology and Paleoclimatology Research
ResumoPulsed-field gel analysis of Magnetospirillum magnetotacticum, strain MS-1, indicates that the genome is a single, circular structure of about 4.3 mb. A few genes, identified by sequence similarity, have been localized and arranged in a map with dnaA, indicating the presumed origin of replication. There are at least two rRNA operons. In addition, rRNA genes are found on a 40 kb, possibly extrachromosomal, structure. The genes thought to be involved in magnetite synthesis, bfr and magA, are located in the same 17% of the genome. A one base pair-overlap seen in the bfr genes of MS-1 is found also in the closely related magnetic strain AMB-1, but not in the non-magnetic relative A. itersonii.
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