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Directed introduction of DNA cleavage sites to produce a high-resolution genetic and physical map of the Acinetobacter sp. strain ADP1 (BD413UE) chromosome.
- Source :
-
Microbiology (Reading, England) [Microbiology (Reading)] 1997 Apr; Vol. 143 ( Pt 4), pp. 1345-1357. - Publication Year :
- 1997
-
Abstract
- The natural transformability of the soil bacterium Acinetobacter sp. ADP1 (BD413UE), formerly classified as A. calcoaceticus, has facilitated previous physiological and biochemical investigations. In the present studies, the natural transformation system was exploited to generated a physical and genetic map of this strain's 3780 +/- 191 kbp circular chromosome. Previously isolated Acinetobacter genes were modified in vitro to incorporate a recognition sequence for the restriction endonuclease NotI. Following transformation of the wild-type strain by the modified DNA, homologous recombination placed each engineered NotI cleavage site at the chromosomal location of the corresponding gene. This allowed precise gene localization and orientation of more than 40 genes relative to a physical map which was constructed with transverse alternating field electrophoresis (TAFE) and Southern hybridization methods. The positions of NotI, AscI and I-CeuI recognition sites were determined, and the latter enzyme identified the presence of seven ribosomal RNA operons. Multiple chromosomal copies of insertion sequence IS1236 were indicated by hybridization. Several of these copies were concentrated in one region of the chromosome in which a spontaneous deletion of approximately 100 kbp occurred. Moreover, contrary to previous reports, ColE1-based plasmids appeared to replicate autonomously in Acinetobacter sp. ADP1.
- Subjects :
- Conjugation, Genetic
DNA Restriction Enzymes metabolism
Deoxyribonucleases, Type II Site-Specific metabolism
Electrophoresis, Gel, Pulsed-Field
Endodeoxyribonucleases metabolism
Genes, Bacterial
Mutation
Nucleic Acid Probes
Operon
Plasmids genetics
RNA, Ribosomal genetics
Restriction Mapping methods
Transformation, Genetic
Acinetobacter genetics
Chromosome Mapping methods
Chromosomes, Bacterial
DNA, Bacterial genetics
DNA, Circular genetics
Subjects
Details
- Language :
- English
- ISSN :
- 1350-0872
- Volume :
- 143 ( Pt 4)
- Database :
- MEDLINE
- Journal :
- Microbiology (Reading, England)
- Publication Type :
- Academic Journal
- Accession number :
- 9141698
- Full Text :
- https://doi.org/10.1099/00221287-143-4-1345