Identification and characterization of pilG , a highly conserved pilus-assembly gene in pathogenic Neisseria
dc.contributor.author | Tønjum, Tone | en_US |
dc.contributor.author | Freitag, Nancy E. | en_US |
dc.contributor.author | Namork, Ellen | en_US |
dc.contributor.author | Koomey, Michael | en_US |
dc.date.accessioned | 2010-06-01T19:53:50Z | |
dc.date.available | 2010-06-01T19:53:50Z | |
dc.date.issued | 1995-05 | en_US |
dc.identifier.citation | TØnjum, Tone; Freitag, Nancy E.; Namork, Ellen; Koomey, Michael (1995). "Identification and characterization of pilG , a highly conserved pilus-assembly gene in pathogenic Neisseria." Molecular Microbiology 16(3): 451-464. <http://hdl.handle.net/2027.42/73027> | en_US |
dc.identifier.issn | 0950-382X | en_US |
dc.identifier.issn | 1365-2958 | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/73027 | |
dc.identifier.uri | http://www.ncbi.nlm.nih.gov/sites/entrez?cmd=retrieve&db=pubmed&list_uids=7565106&dopt=citation | en_US |
dc.description.abstract | Expression of type IV pili appears to be a requisite determinant of infectivity for the strict human pathogens Neisseria gonorrhoeae and Neisseria meningitidis. The assembly of these colonization factors is a complex process. This report describes a new pilus-assembly gene, pilG , that immediately precedes the gonococcal ( Gc) pilD gene encoding the pre-pilin leader peptidase. The nucleotide sequence of this region revealed a single complete open reading frame whose derived polypeptide displayed significant identities to the pilus-assembty protein PilC of Pseudomonas aeruginosa and other polytopic integral cytoplasmic membrane constituents involved in protein export and competence. A unique polypeptide of M r 38kDa corresponding to the gene product was identified. A highly related gene and flanking sequences were cloned from a group E polysaccharide-producing strain of N. meningitidis (Mc). The results indicate that the pilG genes and genetic organization at these loci in Gc and Me are extremely conserved. Hybridization studies strongly suggest that pilG -related genes exist in commensal Neisseria species and other species known to express type IV pili. Defined genetic lesions were created by using insertional and transposon mutagenesis and moved into the Gc and Me chromosomes by allelic replacement. Chromosomal pilG insertion mutants were devoid of pili and displayed dramatically reduced competence for transformation. These findings could not be ascribed to pilin-gene alterations or to polarity exerted on pilD expression. The results indicated that PilG exerts its own independent role in neisserial pilus biogenesis. | en_US |
dc.format.extent | 5329258 bytes | |
dc.format.extent | 3109 bytes | |
dc.format.mimetype | application/pdf | |
dc.format.mimetype | text/plain | |
dc.publisher | Blackwell Publishing Ltd | en_US |
dc.rights | 1995 Blackwell Publishing | en_US |
dc.title | Identification and characterization of pilG , a highly conserved pilus-assembly gene in pathogenic Neisseria | en_US |
dc.type | Article | en_US |
dc.subject.hlbsecondlevel | Microbiology and Immunology | en_US |
dc.subject.hlbtoplevel | Science | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.contributor.affiliationum | Department of Microbiology and Immunology. University of Michigan Medical School, Ann Arbor, Michigan 48109-0620, USA. | en_US |
dc.contributor.affiliationother | Kaptein W. Wilhelmsen og Frues Bakteriologiske Instituit Rikshospitalet (National Hospital), University of Oslo, N-0Q27 Oslo 1 Norway. | en_US |
dc.contributor.affiliationother | Electron Microscopy Unit, National Institute of Public Health, 0462 Oslo, Norway. | en_US |
dc.identifier.pmid | 7565106 | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/73027/1/j.1365-2958.1995.tb02410.x.pdf | |
dc.identifier.doi | 10.1111/j.1365-2958.1995.tb02410.x | en_US |
dc.identifier.source | Molecular Microbiology | en_US |
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dc.owningcollname | Interdisciplinary and Peer-Reviewed |
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