The genome of Haemophilus influenzae Rd has a unique NotI site.
Previous analysis of physical maps of Haemophilus influenzae, which is circular and 1.9 Mb in length [Lee and Smith, J. Bacteriol. 170 (1988) 4402-4405; Kauc et al., J. Bacteriol. 171 (1989) 2474-2479], did not detect any NotI (GCGGCCGC) restriction sites. A transposon, Tn916, was constructed to contain a NotI linker cloned into its NciI site and introduced into the H. influenzae chromosome. NotI digestion of chromosomes containing a Tn916-associated NotI site followed by separation of fragments by field-inversion gel electrophoresis revealed the presence of two fragments obtained by two NotI cuts, one in Tn916 and the other, a unique, 'natural' NotI site in the original chromosomal DNA. The examination of other Haemophilus strains demonstrated the presence of one or more NotI sites in all of those tested.
Kauc
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Department of Microbiology, School of Medicine, University of Pennsylvania, Philadelphia 19104.
Mitchell
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Goodgal
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D001483:Base Sequence; D015139:Blotting, Southern; D003001:Cloning, Molecular; D004251:DNA Transposable Elements; D004270:DNA, Circular / Q000032:analysis; D015252:Deoxyribonucleases, Type II Site-Specific / Q000235:genetics*; D005814:Genes, Viral; D006193:Haemophilus influenzae / Q000235:genetics*; D008969:Molecular Sequence Data; D012150:Polymorphism, Restriction Fragment Length; D015183:Restriction Mapping
D004251:DNA Transposable Elements; D004270:DNA, Circular; D015252:Deoxyribonucleases, Type II Site-Specific; C038565:GCGGCCGC-specific type II deoxyribonucleases