title: Meningococcal genome dynamics.
abstract: Neisseria meningitidis (the meningococcus) is an important commensal, pathogen and model organism that faces up to the environment in its exclusive human host with a small but hyperdynamic genome. Compared with Escherichia coli, several DNA-repair genes are absent in N. meningitidis, whereas the gene products of others interact differently. Instead of responding to external stimuli, the meningococcus spontaneously produces a plethora of genetic variants. The frequent genomic alterations and polymorphisms have profound consequences for the interaction of this microorganism with its host, impacting structural and antigenic changes in crucial surface components that are relevant for adherence and invasion as well as antibiotic resistance and vaccine development.
authors.affiliation: Centre for Molecular Biology and Neuroscience and Institute of Microbiology, University of Oslo, Rikshospitalet, N-0027 Oslo, Norway.
authors.forename: Tonje
authors.initials: T
authors.lastname: Davidsen
authors.forename: Tone
authors.initials: T
authors.lastname: Tønjum
mesh_terms: D000940:Antigenic Variation; D000942:Antigens, Bacterial / Q000235:genetics; D001483:Base Sequence; D004260:DNA Repair / Q000235:genetics; D004269:DNA, Bacterial / Q000235:genetics / Q000378:metabolism; D004926:Escherichia coli / Q000235:genetics / Q000378:metabolism; D016680:Genome, Bacterial; D042822:Genomic Instability; D006801:Humans; D009345:Neisseria meningitidis / Q000235:genetics* / Q000276:immunology / Q000378:metabolism / Q000472:pathogenicity; D013014:SOS Response, Genetics / Q000235:genetics; D013045:Species Specificity; D014774:Virulence / Q000235:genetics
chemical_list: D000942:Antigens, Bacterial; D004269:DNA, Bacterial