Watkins KL

References (4)

Title : Three genomes from the phylum Acidobacteria provide insight into the lifestyles of these microorganisms in soils - Ward_2009_Appl.Environ.Microbiol_75_2046
Author(s) : Ward NL , Challacombe JF , Janssen PH , Henrissat B , Coutinho PM , Wu M , Xie G , Haft DH , Sait M , Badger J , Barabote RD , Bradley B , Brettin TS , Brinkac LM , Bruce D , Creasy T , Daugherty SC , Davidsen TM , DeBoy RT , Detter JC , Dodson RJ , Durkin AS , Ganapathy A , Gwinn-Giglio M , Han CS , Khouri H , Kiss H , Kothari SP , Madupu R , Nelson KE , Nelson WC , Paulsen I , Penn K , Ren Q , Rosovitz MJ , Selengut JD , Shrivastava S , Sullivan SA , Tapia R , Thompson LS , Watkins KL , Yang Q , Yu C , Zafar N , Zhou L , Kuske CR
Ref : Applied Environmental Microbiology , 75 :2046 , 2009
Abstract : The complete genomes of three strains from the phylum Acidobacteria were compared. Phylogenetic analysis placed them as a unique phylum. They share genomic traits with members of the Proteobacteria, the Cyanobacteria, and the Fungi. The three strains appear to be versatile heterotrophs. Genomic and culture traits indicate the use of carbon sources that span simple sugars to more complex substrates such as hemicellulose, cellulose, and chitin. The genomes encode low-specificity major facilitator superfamily transporters and high-affinity ABC transporters for sugars, suggesting that they are best suited to low-nutrient conditions. They appear capable of nitrate and nitrite reduction but not N(2) fixation or denitrification. The genomes contained numerous genes that encode siderophore receptors, but no evidence of siderophore production was found, suggesting that they may obtain iron via interaction with other microorganisms. The presence of cellulose synthesis genes and a large class of novel high-molecular-weight excreted proteins suggests potential traits for desiccation resistance, biofilm formation, and/or contribution to soil structure. Polyketide synthase and macrolide glycosylation genes suggest the production of novel antimicrobial compounds. Genes that encode a variety of novel proteins were also identified. The abundance of acidobacteria in soils worldwide and the breadth of potential carbon use by the sequenced strains suggest significant and previously unrecognized contributions to the terrestrial carbon cycle. Combining our genomic evidence with available culture traits, we postulate that cells of these isolates are long-lived, divide slowly, exhibit slow metabolic rates under low-nutrient conditions, and are well equipped to tolerate fluctuations in soil hydration.
ESTHER : Ward_2009_Appl.Environ.Microbiol_75_2046
PubMedSearch : Ward_2009_Appl.Environ.Microbiol_75_2046
PubMedID: 19201974
Gene_locus related to this paper: korve-q1ihr9 , korve-q1ii02 , korve-q1iit0 , korve-q1ilk4 , korve-q1imj9 , korve-q1ims4 , korve-q1iqj0 , korve-q1isy7 , korve-q1itj5 , korve-q1itz6 , korve-q1ivc8 , acic5-c1f1u6 , acic5-c1f2i7 , acic5-c1f4m6 , acic5-c1f4y4 , acic5-c1f5a7 , acic5-c1f5u2 , acic5-c1f7a9 , acic5-c1f7x6 , acic5-c1f8y9 , acic5-c1f9m2 , acic5-c1f594 , acic5-c1f609 , acic5-c1f692 , acic5-c1f970 , acic5-c1fa52 , korve-q1iiw2 , korve-q1ivn9 , solue-q01nb0 , solue-q01qj6 , solue-q01r37 , solue-q01rq8 , solue-q01rz0 , solue-q01t44 , solue-q01t57 , solue-q01ts5 , solue-q01tv4 , solue-q01vd8 , solue-q01vr3 , solue-q01vw5 , solue-q01w12 , solue-q01wt9 , solue-q01y40 , solue-q01ym8 , solue-q01z24 , solue-q01z97 , solue-q01zl4 , solue-q01zm0 , solue-q01zm5 , solue-q01zm7 , solue-q02aa4 , solue-q02ab9 , solue-q02b72 , solue-q02bs8 , solue-q02bt7 , solue-q02cp0 , solue-q02d61 , solue-q020h3 , solue-q020i8 , solue-q021i6 , solue-q022b1 , solue-q022p8 , solue-q022q2 , solue-q022q3 , solue-q022x2 , solue-q022x5 , solue-q022x6 , solue-q022x8 , solue-q023e7 , solue-q024d9 , solue-q025c1 , solue-q026j1 , solue-q026k6 , solue-q026r6 , solue-q027p2 , solue-q027r8 , solue-q01zt5 , korve-q1itw6 , solue-q01yh7 , solue-q02ad6 , korve-q1imj6 , korve-q1iuf6 , acic5-c1f891 , solue-q026h7

Title : Metabolic complementarity and genomics of the dual bacterial symbiosis of sharpshooters - Wu_2006_PLoS.Biol_4_e188
Author(s) : Wu D , Daugherty SC , Van Aken SE , Pai GH , Watkins KL , Khouri H , Tallon LJ , Zaborsky JM , Dunbar HE , Tran PL , Moran NA , Eisen JA
Ref : PLoS Biol , 4 :e188 , 2006
Abstract : Mutualistic intracellular symbiosis between bacteria and insects is a widespread phenomenon that has contributed to the global success of insects. The symbionts, by provisioning nutrients lacking from diets, allow various insects to occupy or dominate ecological niches that might otherwise be unavailable. One such insect is the glassy-winged sharpshooter (Homalodisca coagulata), which feeds on xylem fluid, a diet exceptionally poor in organic nutrients. Phylogenetic studies based on rRNA have shown two types of bacterial symbionts to be coevolving with sharpshooters: the gamma-proteobacterium Baumannia cicadellinicola and the Bacteroidetes species Sulcia muelleri. We report here the sequencing and analysis of the 686,192-base pair genome of B. cicadellinicola and approximately 150 kilobase pairs of the small genome of S. muelleri, both isolated from H. coagulata. Our study, which to our knowledge is the first genomic analysis of an obligate symbiosis involving multiple partners, suggests striking complementarity in the biosynthetic capabilities of the two symbionts: B. cicadellinicola devotes a substantial portion of its genome to the biosynthesis of vitamins and cofactors required by animals and lacks most amino acid biosynthetic pathways, whereas S. muelleri apparently produces most or all of the essential amino acids needed by its host. This finding, along with other results of our genome analysis, suggests the existence of metabolic codependency among the two unrelated endosymbionts and their insect host. This dual symbiosis provides a model case for studying correlated genome evolution and genome reduction involving multiple organisms in an intimate, obligate mutualistic relationship. In addition, our analysis provides insight for the first time into the differences in symbionts between insects (e.g., aphids) that feed on phloem versus those like H. coagulata that feed on xylem. Finally, the genomes of these two symbionts provide potential targets for controlling plant pathogens such as Xylella fastidiosa, a major agroeconomic problem, for which H. coagulata and other sharpshooters serve as vectors of transmission.
ESTHER : Wu_2006_PLoS.Biol_4_e188
PubMedSearch : Wu_2006_PLoS.Biol_4_e188
PubMedID: 16729848
Gene_locus related to this paper: bauch-q1lsz2

Title : Skewed genomic variability in strains of the toxigenic bacterial pathogen, Clostridium perfringens - Myers_2006_Genome.Res_16_1031
Author(s) : Myers GS , Rasko DA , Cheung JK , Ravel J , Seshadri R , DeBoy RT , Ren Q , Varga J , Awad MM , Brinkac LM , Daugherty SC , Haft DH , Dodson RJ , Madupu R , Nelson WC , Rosovitz MJ , Sullivan SA , Khouri H , Dimitrov GI , Watkins KL , Mulligan S , Benton J , Radune D , Fisher DJ , Atkins HS , Hiscox T , Jost BH , Billington SJ , Songer JG , McClane BA , Titball RW , Rood JI , Melville SB , Paulsen IT
Ref : Genome Res , 16 :1031 , 2006
Abstract : Clostridium perfringens is a Gram-positive, anaerobic spore-forming bacterium commonly found in soil, sediments, and the human gastrointestinal tract. C. perfringens is responsible for a wide spectrum of disease, including food poisoning, gas gangrene (clostridial myonecrosis), enteritis necroticans, and non-foodborne gastrointestinal infections. The complete genome sequences of Clostridium perfringens strain ATCC 13124, a gas gangrene isolate and the species type strain, and the enterotoxin-producing food poisoning strain SM101, were determined and compared with the published C. perfringens strain 13 genome. Comparison of the three genomes revealed considerable genomic diversity with >300 unique "genomic islands" identified, with the majority of these islands unusually clustered on one replichore. PCR-based analysis indicated that the large genomic islands are widely variable across a large collection of C. perfringens strains. These islands encode genes that correlate to differences in virulence and phenotypic characteristics of these strains. Significant differences between the strains include numerous novel mobile elements and genes encoding metabolic capabilities, strain-specific extracellular polysaccharide capsule, sporulation factors, toxins, and other secreted enzymes, providing substantial insight into this medically important bacterial pathogen.
ESTHER : Myers_2006_Genome.Res_16_1031
PubMedSearch : Myers_2006_Genome.Res_16_1031
PubMedID: 16825665
Gene_locus related to this paper: clope-CPE0307 , clope-CPE0432 , clope-CPE1581 , clope-CPE1596 , clope-CPE1989 , clope-CPE2231 , clope-lipa , clope-LIPB , clope-PLDB

Title : The genome sequence of Bacillus anthracis Ames and comparison to closely related bacteria - Read_2003_Nature_423_81
Author(s) : Read TD , Peterson SN , Tourasse N , Baillie LW , Paulsen IT , Nelson KE , Tettelin H , Fouts DE , Eisen JA , Gill SR , Holtzapple EK , Okstad OA , Helgason E , Rilstone J , Wu M , Kolonay JF , Beanan MJ , Dodson RJ , Brinkac LM , Gwinn M , DeBoy RT , Madpu R , Daugherty SC , Durkin AS , Haft DH , Nelson WC , Peterson JD , Pop M , Khouri HM , Radune D , Benton JL , Mahamoud Y , Jiang L , Hance IR , Weidman JF , Berry KJ , Plaut RD , Wolf AM , Watkins KL , Nierman WC , Hazen A , Cline R , Redmond C , Thwaite JE , White O , Salzberg SL , Thomason B , Friedlander AM , Koehler TM , Hanna PC , Kolsto AB , Fraser CM
Ref : Nature , 423 :81 , 2003
Abstract : Bacillus anthracis is an endospore-forming bacterium that causes inhalational anthrax. Key virulence genes are found on plasmids (extra-chromosomal, circular, double-stranded DNA molecules) pXO1 (ref. 2) and pXO2 (ref. 3). To identify additional genes that might contribute to virulence, we analysed the complete sequence of the chromosome of B. anthracis Ames (about 5.23 megabases). We found several chromosomally encoded proteins that may contribute to pathogenicity--including haemolysins, phospholipases and iron acquisition functions--and identified numerous surface proteins that might be important targets for vaccines and drugs. Almost all these putative chromosomal virulence and surface proteins have homologues in Bacillus cereus, highlighting the similarity of B. anthracis to near-neighbours that are not associated with anthrax. By performing a comparative genome hybridization of 19 B. cereus and Bacillus thuringiensis strains against a B. anthracis DNA microarray, we confirmed the general similarity of chromosomal genes among this group of close relatives. However, we found that the gene sequences of pXO1 and pXO2 were more variable between strains, suggesting plasmid mobility in the group. The complete sequence of B. anthracis is a step towards a better understanding of anthrax pathogenesis.
ESTHER : Read_2003_Nature_423_81
PubMedSearch : Read_2003_Nature_423_81
PubMedID: 12721629
Gene_locus related to this paper: bacan-BA0160 , bacan-BA0950 , bacan-BA0954 , bacan-BA1019 , bacan-BA1242 , bacan-BA1727 , bacan-BA1747 , bacan-BA1866 , bacan-BA1914 , bacan-BA2015 , bacan-BA2392 , bacan-BA2417 , bacan-BA2557 , bacan-BA2607 , bacan-BA2687 , bacan-BA2694 , bacan-BA2738 , bacan-BA2865 , bacan-BA3068 , bacan-BA3165 , bacan-BA3178 , bacan-BA3187 , bacan-BA3343 , bacan-BA3372 , bacan-BA3703 , bacan-BA3805 , bacan-BA3863 , bacan-BA3877 , bacan-BA3887 , bacan-BA4324 , bacan-BA4328 , bacan-BA4338 , bacan-BA4577 , bacan-BA4983 , bacan-BA5009 , bacan-BA5110 , bacan-BA5136 , bacan-DHBF , bacan-q81tt2 , bacce-BC0192 , bacce-BC1788 , bacce-BC1954 , bacce-BC2141 , bacce-BC2171 , bacce-BC4730 , bacce-BC4862 , bacce-BC5130 , bacce-PHAC , bacce-q72yu1 , baccr-pepx