Kyung K

References (3)

Title : Genome sequence of Cronobacter sakazakii BAA-894 and comparative genomic hybridization analysis with other Cronobacter species - Kucerova_2010_PLoS.One_5_e9556
Author(s) : Kucerova E , Clifton SW , Xia XQ , Long F , Porwollik S , Fulton L , Fronick C , Minx P , Kyung K , Warren W , Fulton R , Feng D , Wollam A , Shah N , Bhonagiri V , Nash WE , Hallsworth-Pepin K , Wilson RK , McClelland M , Forsythe SJ
Ref : PLoS ONE , 5 :e9556 , 2010
Abstract : BACKGROUND: The genus Cronobacter (formerly called Enterobacter sakazakii) is composed of five species; C. sakazakii, C. malonaticus, C. turicensis, C. muytjensii, and C. dublinensis. The genus includes opportunistic human pathogens, and the first three species have been associated with neonatal infections. The most severe diseases are caused in neonates and include fatal necrotizing enterocolitis and meningitis. The genetic basis of the diversity within the genus is unknown, and few virulence traits have been identified. METHODOLOGY/PRINCIPAL FINDINGS: We report here the first sequence of a member of this genus, C. sakazakii strain BAA-894. The genome of Cronobacter sakazakii strain BAA-894 comprises a 4.4 Mb chromosome (57% GC content) and two plasmids; 31 kb (51% GC) and 131 kb (56% GC). The genome was used to construct a 387,000 probe oligonucleotide tiling DNA microarray covering the whole genome. Comparative genomic hybridization (CGH) was undertaken on five other C. sakazakii strains, and representatives of the four other Cronobacter species. Among 4,382 annotated genes inspected in this study, about 55% of genes were common to all C. sakazakii strains and 43% were common to all Cronobacter strains, with 10-17% absence of genes. CONCLUSIONS/SIGNIFICANCE: CGH highlighted 15 clusters of genes in C. sakazakii BAA-894 that were divergent or absent in more than half of the tested strains; six of these are of probable prophage origin. Putative virulence factors were identified in these prophage and in other variable regions. A number of genes unique to Cronobacter species associated with neonatal infections (C. sakazakii, C. malonaticus and C. turicensis) were identified. These included a copper and silver resistance system known to be linked to invasion of the blood-brain barrier by neonatal meningitic strains of Escherichia coli. In addition, genes encoding for multidrug efflux pumps and adhesins were identified that were unique to C. sakazakii strains from outbreaks in neonatal intensive care units.
ESTHER : Kucerova_2010_PLoS.One_5_e9556
PubMedSearch : Kucerova_2010_PLoS.One_5_e9556
PubMedID: 20221447
Gene_locus related to this paper: cros8-a7men1 , cros8-a7mft0 , 9entr-k7zz64

Title : Widespread divergence between incipient Anopheles gambiae species revealed by whole genome sequences - Lawniczak_2010_Science_330_512
Author(s) : Lawniczak MK , Emrich SJ , Holloway AK , Regier AP , Olson M , White B , Redmond S , Fulton L , Appelbaum E , Godfrey J , Farmer C , Chinwalla A , Yang SP , Minx P , Nelson J , Kyung K , Walenz BP , Garcia-Hernandez E , Aguiar M , Viswanathan LD , Rogers YH , Strausberg RL , Saski CA , Lawson D , Collins FH , Kafatos FC , Christophides GK , Clifton SW , Kirkness EF , Besansky NJ
Ref : Science , 330 :512 , 2010
Abstract : The Afrotropical mosquito Anopheles gambiae sensu stricto, a major vector of malaria, is currently undergoing speciation into the M and S molecular forms. These forms have diverged in larval ecology and reproductive behavior through unknown genetic mechanisms, despite considerable levels of hybridization. Previous genome-wide scans using gene-based microarrays uncovered divergence between M and S that was largely confined to gene-poor pericentromeric regions, prompting a speciation-with-ongoing-gene-flow model that implicated only about 3% of the genome near centromeres in the speciation process. Here, based on the complete M and S genome sequences, we report widespread and heterogeneous genomic divergence inconsistent with appreciable levels of interform gene flow, suggesting a more advanced speciation process and greater challenges to identify genes critical to initiating that process.
ESTHER : Lawniczak_2010_Science_330_512
PubMedSearch : Lawniczak_2010_Science_330_512
PubMedID: 20966253
Gene_locus related to this paper: anoga-Q7PVF9 , anoga-q7q837 , 9dipt-a0a182ksz6 , anost-a0a182xxz0 , anost-a0a182xzf1 , anoga-q7q887

Title : Signatures of adaptation to obligate biotrophy in the Hyaloperonospora arabidopsidis genome - Baxter_2010_Science_330_1549
Author(s) : Baxter L , Tripathy S , Ishaque N , Boot N , Cabral A , Kemen E , Thines M , Ah-Fong A , Anderson R , Badejoko W , Bittner-Eddy P , Boore JL , Chibucos MC , Coates M , Dehal P , Delehaunty K , Dong S , Downton P , Dumas B , Fabro G , Fronick C , Fuerstenberg SI , Fulton L , Gaulin E , Govers F , Hughes L , Humphray S , Jiang RH , Judelson H , Kamoun S , Kyung K , Meijer H , Minx P , Morris P , Nelson J , Phuntumart V , Qutob D , Rehmany A , Rougon-Cardoso A , Ryden P , Torto-Alalibo T , Studholme D , Wang Y , Win J , Wood J , Clifton SW , Rogers J , Van den Ackerveken G , Jones JD , McDowell JM , Beynon J , Tyler BM
Ref : Science , 330 :1549 , 2010
Abstract : Many oomycete and fungal plant pathogens are obligate biotrophs, which extract nutrients only from living plant tissue and cannot grow apart from their hosts. Although these pathogens cause substantial crop losses, little is known about the molecular basis or evolution of obligate biotrophy. Here, we report the genome sequence of the oomycete Hyaloperonospora arabidopsidis (Hpa), an obligate biotroph and natural pathogen of Arabidopsis thaliana. In comparison with genomes of related, hemibiotrophic Phytophthora species, the Hpa genome exhibits dramatic reductions in genes encoding (i) RXLR effectors and other secreted pathogenicity proteins, (ii) enzymes for assimilation of inorganic nitrogen and sulfur, and (iii) proteins associated with zoospore formation and motility. These attributes comprise a genomic signature of evolution toward obligate biotrophy.
ESTHER : Baxter_2010_Science_330_1549
PubMedSearch : Baxter_2010_Science_330_1549
PubMedID: 21148394
Gene_locus related to this paper: hyaae-m4b4d8 , hyaae-m4b4e0 , hyaae-m4bkr1 , hyaae-m4bkw7