Imperial College London


Faculty of MedicineDepartment of Medicine

Reader in Molecular Bacteriology & Infection



+44 (0)20 7594 2080v.pelicic Website




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BibTex format

author = {Geoffroy, M-C and Floquet, S and Métais, A and Nassif, X and Pelicic, V},
doi = {10.1101/gr.664303},
journal = {Genome Res},
pages = {391--398},
title = {Large-scale analysis of the meningococcus genome by gene disruption: resistance to complement-mediated lysis.},
url = {},
volume = {13},
year = {2003}

RIS format (EndNote, RefMan)

AB - The biologic role of a majority of the Neisseria meningitidis 2100 predicted coding regions is still to be assigned or experimentally confirmed. Determining the phenotypic effect of gene disruption being a fundamental approach to understanding gene function, we used high-density signature-tagged transposon mutagenesis, followed by a large-scale sequencing of the transposon insertion sites, to construct a genome-wide collection of mutants. The sequencing results for the first half of the 4548 mutants composing the library suggested that we have mutations in 80%-90% of N. meningitidis nonessential genes. This was confirmed by a whole-genome identification of the genes required for resistance to complement-mediated lysis, a key to meningococcal virulence. We show that all the genes we identified, including four previously uncharacterized, were important for the synthesis of the polysialic acid capsule or the lipooligosaccharide (LOS), suggesting that these are likely to be the only meningococcal attributes necessary for serum resistance. Our work provides a valuable and lasting resource that may lead to a global map of gene function in N. meningitidis.
AU - Geoffroy,M-C
AU - Floquet,S
AU - Métais,A
AU - Nassif,X
AU - Pelicic,V
DO - 10.1101/gr.664303
EP - 398
PY - 2003///
SN - 1088-9051
SP - 391
TI - Large-scale analysis of the meningococcus genome by gene disruption: resistance to complement-mediated lysis.
T2 - Genome Res
UR -
UR -
UR -
VL - 13
ER -