title: Conjugation deficient E. coli K12 F- mutants with heptose-less lipopolysaccharide.
abstract: Two F- mutants deficient in conjugation with F-type donors are isolated and characterized. Phenotypically, these mutants are similar; they have heptose-less lipopolysaccharide and lack some outer membrane protein. Genotypically, they are different. One mutant harbors a point mutation in the 70 to 74 min region, while the other is deleted for the chromosomal region 6.5 to 8.5 min. Comparison of the properties of the conjugation-deficient mutants described in this paper with other such mutants suggests that an outer membrane protein is the receptor for the f-pilus.
mesh_terms: D001665:Binding Sites; D002462:Cell Membrane; D002874:Chromosome Mapping; D002876:Chromosomes, Bacterial; D003090:Coliphages; D003227:Conjugation, Genetic; D004926:Escherichia coli / Q000378:metabolism*; D005144:F Factor; D005838:Genotype; D006539:Heptoses / Q000378:metabolism; D008070:Lipopolysaccharides / Q000378:metabolism*; D009154:Mutation; D010641:Phenotype
chemical_list: D006539:Heptoses; D008070:Lipopolysaccharides