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The Orientia tsutsugamushi genome reveals massive proliferation of conjugative type IV secretion system and host-cell interaction genes

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dc.contributor.authorCho, Nam-Hyuk-
dc.contributor.authorKim, Hang-Rae-
dc.contributor.authorLee, Jung-Hee-
dc.contributor.authorKim, Se-Yoon-
dc.contributor.authorKim, Jaejong-
dc.contributor.authorCha, Sunho-
dc.contributor.authorDarby, Alistair C.-
dc.contributor.authorFuxelius, Hans-Henrik-
dc.contributor.authorYin, Jun-
dc.contributor.authorKim, Ju Han-
dc.contributor.authorLee, Sang Joo-
dc.contributor.authorKoh, Young-Sang-
dc.contributor.authorJang, Won-Jong-
dc.contributor.authorPark, Kyung-Hee-
dc.contributor.authorAndersson, Siv G. E.-
dc.contributor.authorChoi, Myung-Sik-
dc.contributor.authorKim, Ik-Sang-
dc.contributor.authorKim, Sang-Yoon-
dc.date.accessioned2010-01-12T06:44:23Z-
dc.date.available2010-01-12T06:44:23Z-
dc.date.issued2007-05-08-
dc.identifier.citationProc Natl Acad Sci U S A. 2007 May 8;104(19):7981-6. Epub 2007 May 2.en
dc.identifier.issn0027-8424 (Print)-
dc.identifier.urihttp://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=17483455-
dc.identifier.urihttps://hdl.handle.net/10371/29736-
dc.description.abstractScrub typhus is caused by the obligate intracellular rickettsia Orientia tsutsugamushi (previously called Rickettsia tsutsugamushi). The bacterium is maternally inherited in trombicuid mites and transmitted to humans by feeding larvae. We report here the 2,127,051-bp genome of the Boryong strain, which represents the most highly repeated bacterial genome sequenced to date. The repeat density of the scrub typhus pathogen is 200-fold higher than that of its close relative Rickettsia prowazekii, the agent of epidemic typhus. A total of 359 tra genes for components of conjugative type IV secretion systems were identified at 79 sites in the genome. Associated with these are >200 genes for signaling and host-cell interaction proteins, such as histidine kinases, ankyrin-repeat proteins, and tetratrico peptide-repeat proteins. Additionally, the O. tsutsugamushi genome contains >400 transposases, 60 phage integrases, and 70 reverse transcriptases. Deletions and rearrangements have yielded unique gene combinations as well as frequent pseudogenization in the tra clusters. A comparative analysis of the tra clusters within the genome and across strains indicates sequence homogenization by gene conversion, whereas complexity, diversity, and pseudogenization are acquired by duplications, deletions, and transposon integrations into the amplified segments. The results suggest intragenomic duplications or multiple integrations of a massively proliferating conjugative transfer system. Diversifying selection on host-cell interaction genes along with repeated population bottlenecks may drive rare genome variants to fixation, thereby short-circuiting selection for low complexity in bacterial genomes.en
dc.language.isoen-
dc.publisherNational Academy of Sciencesen
dc.subjectDNA Transposable Elementsen
dc.subjectGene Duplicationen
dc.subjectGenetic Variationen
dc.subject*Genome, Bacterialen
dc.subjectHumansen
dc.subjectMultigene Familyen
dc.subjectOrientia tsutsugamushi/*genetics/metabolismen
dc.titleThe Orientia tsutsugamushi genome reveals massive proliferation of conjugative type IV secretion system and host-cell interaction genesen
dc.typeArticleen
dc.contributor.AlternativeAuthor조남혁-
dc.contributor.AlternativeAuthor김항래-
dc.contributor.AlternativeAuthor이정희-
dc.contributor.AlternativeAuthor김세윤-
dc.contributor.AlternativeAuthor김재종-
dc.contributor.AlternativeAuthor차선호-
dc.contributor.AlternativeAuthor김상윤-
dc.contributor.AlternativeAuthor김주한-
dc.contributor.AlternativeAuthor김지헌-
dc.contributor.AlternativeAuthor이상주-
dc.contributor.AlternativeAuthor고영상-
dc.contributor.AlternativeAuthor장원종-
dc.contributor.AlternativeAuthor박경희-
dc.identifier.doi10.1073/pnas.0611553104-
Appears in Collections:
College of Medicine/School of Medicine (의과대학/대학원)Microbiology (미생물학전공)Journal Papers (저널논문_미생물학전공)
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