Cloning and molecular characterization of a Legionella pneumophila gene induced by intracellular infection and by various in vitro stress conditions
dc.contributor.author | Kwaik, Yousef Abu | en_US |
dc.contributor.author | Engleberg, Niels Cary | en_US |
dc.date.accessioned | 2010-06-01T22:42:25Z | |
dc.date.available | 2010-06-01T22:42:25Z | |
dc.date.issued | 1994-07 | en_US |
dc.identifier.citation | Kwaik, Yousef Abu; Engleberg, N. Cary (1994). "Cloning and molecular characterization of a Legionella pneumophila gene induced by intracellular infection and by various in vitro stress conditions." Molecular Microbiology 13(2): 243-251. <http://hdl.handle.net/2027.42/75677> | en_US |
dc.identifier.issn | 0950-382X | en_US |
dc.identifier.issn | 1365-2958 | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/75677 | |
dc.identifier.uri | http://www.ncbi.nlm.nih.gov/sites/entrez?cmd=retrieve&db=pubmed&list_uids=7984104&dopt=citation | en_US |
dc.description.abstract | The synthesis of a global stress protein (GspA) of Legionella pneumophila is induced in the intracellular environment of the phagocytic ceil and by various in vitro stress stimuli. We used techniques of reverse genetics to isolate the gspA gene from a genomic library of L. pneumophila. Sequence analysis of approximately 1700 bp of a representative clone (pBSP1) showed the presence of two open reading frames (ORFs). 0RF1 encoded for a polypeptide with an inferred molecular mass of 19kDa and an iso-electric point of 6.1. These predictions correlated with the migration of the GspA protein on two-dimensional SDS-polyacrylamide gels. The predicted amino acid sequence of the GspA protein was identicai to 22/23 residues of the N-terminal amino acid sequence derived by Edman degradation of the purified protein. The GspA protein was 41.3% and 36.5% identical to the 16 kDa ibpA and IbpB heat-shock proteins, respectively, of Escherichia coli. Primer extension from mRNA isolated from L. pneumophila showed that transcription of the gspA gene was controlled by two overlapping promoters. One of the promoters was a Σ 70 promoter, while the other was a heat-shock promoter and was regulated by the Σ 32 transcription factor in E. coli. Northern biol analysis showed that the level of gspA mRNA was elevated 3.4-, 5.0- and 6.7-foid after exposure of L. pneumophila to heat shock, oxidative stress and osmotic shock, respectiveiy. The gspA gene was conserved among 13 serogroups of L pneumophila. Our data showed that the gspA gene of L. pneumophila , which is induced by intracellular infection and by various stress stimuli, is controlled transcriptionally by two overlapping and separately regulated promoters. | en_US |
dc.format.extent | 4080856 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 | 1994 Blackwell Publishing | en_US |
dc.title | Cloning and molecular characterization of a Legionella pneumophila gene induced by intracellular infection and by various in vitro stress conditions | 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 Internal Medicine, University of Michigan Medical School, Ann Arbor. Michigan 48109–0620. USA. | en_US |
dc.contributor.affiliationother | Department of Microbiology and Immunology | en_US |
dc.identifier.pmid | 7984104 | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/75677/1/j.1365-2958.1994.tb00419.x.pdf | |
dc.identifier.doi | 10.1111/j.1365-2958.1994.tb00419.x | en_US |
dc.identifier.source | Molecular Microbiology | en_US |
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dc.owningcollname | Interdisciplinary and Peer-Reviewed |
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