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  • 1
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    Defining the Genome Features of Escherichia albertii, an Emerging Enteropathogen Closely Related to Escherichia coli (2015)
    Oxford University Press
    Details
    Publication Date: 2015-12-05
    Description: Escherichia albertii is a recently recognized close relative of Escherichia coli . This emerging enteropathogen possesses a type III secretion system (T3SS) encoded by the locus of enterocyte effacement, similar to enteropathogenic and enterohemorrhagic E. coli (EPEC and EHEC). Shiga toxin-producing strains have also been identified. The genomic features of E. albertii , particularly differences from other Escherichia species, have not yet been well clarified. Here, we sequenced the genome of 29 E. albertii strains (3 complete and 26 draft sequences) isolated from multiple sources and performed intraspecies and intragenus genomic comparisons. The sizes of the E. albertii genomes range from 4.5 to 5.1 Mb, smaller than those of E. coli strains. Intraspecies genomic comparisons identified five phylogroups of E. albertii . Intragenus genomic comparison revealed that the possible core genome of E. albertii comprises 3,250 genes, whereas that of the genus Escherichia comprises 1,345 genes. Our analysis further revealed several unique or notable genetic features of E. albertii , including those responsible for known biochemical features and virulence factors and a possibly active second T3SS known as ETT2 ( E. coli T3SS 2) that is inactivated in E. coli . Although this organism has been observed to be nonmotile in vitro, genes for flagellar biosynthesis are fully conserved; chemotaxis-related genes have been selectively deleted. Based on these results, we have developed a nested polymerase chain reaction system to directly detect E. albertii . Our data define the genomic features of E. albertii and provide a valuable basis for future studies of this important emerging enteropathogen.
    Electronic ISSN: 1759-6653
    Topics: Biology
    Published by Oxford University Press
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  • 2
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    Response of the protistan community of a rice field soil to different oxygen tensions (2016)
    Oxford University Press
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    Publication Date: 2016-06-08
    Description: Heterotrophic protists in soil are grazers that control the biomass and community structure of bacteria, thereby enhancing nutrient recycling. Oxygen regulates the microeukaryotic community, but little is known about its response to microoxic conditions. Here we studied the impact of oxygen tension on culturable heterotrophic protists in a rice field soil. The number of protists, dominated by amoeba and flagellates, under oxygen tensions ranging from atmospheric level (21%) to below the Pasteur point (0.08%) were similar (10 4 cells g –1 dry soil); no protists were detected under anoxic conditions. DGGE fingerprinting of microeukaryotes demonstrated a shift in the community structure depending on the oxygen tension during growth. Both common and specific amoeba and flagellates were identified at different oxygen tensions. Amoeba isolates ( Acanthamoeba sp. and Hartmannella sp.) grew to the same extent under the oxygen tensions tested; the Acanthamoeba sp. isolate migrated more slowly under the lowest tension (0.08%). Our results demonstrated that amoeba and flagellates in soil adapt to a wide range of oxygen tensions with a shift in community structure. This suggests an ability to search for food in soil environments such as the oxic–anoxic interface of flooded soil or inside soil aggregates that are inaccessible to ciliates.
    Print ISSN: 0168-6496
    Electronic ISSN: 1574-6941
    Topics: Biology
    Published by Oxford University Press
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  • 3
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    Gibberellin-induced DELLA recognition by the gibberellin receptor GID1 (2008)
    Nature Publishing Group (NPG)
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    Publication Date: 2008-11-28
    Description: Gibberellins control a range of growth and developmental processes in higher plants and have been widely used in the agricultural industry. By binding to a nuclear receptor, GIBBERELLIN INSENSITIVE DWARF1 (GID1), gibberellins regulate gene expression by promoting degradation of the transcriptional regulator DELLA proteins, including GIBBERELLIN INSENSITIVE (GAI). The precise manner in which GID1 discriminates and becomes activated by bioactive gibberellins for specific binding to DELLA proteins remains unclear. Here we present the crystal structure of a ternary complex of Arabidopsis thaliana GID1A, a bioactive gibberellin and the amino-terminal DELLA domain of GAI. In this complex, GID1A occludes gibberellin in a deep binding pocket covered by its N-terminal helical switch region, which in turn interacts with the DELLA domain containing DELLA, VHYNP and LExLE motifs. Our results establish a structural model of a plant hormone receptor that is distinct from the mechanism of the hormone perception and effector recognition of the known auxin receptors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Murase, Kohji -- Hirano, Yoshinori -- Sun, Tai-ping -- Hakoshima, Toshio -- England -- Nature. 2008 Nov 27;456(7221):459-63. doi: 10.1038/nature07519.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Structural Biology Laboratory, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara 630-0192, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19037309" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Motifs ; Arabidopsis/*chemistry/metabolism ; Arabidopsis Proteins/*chemistry/genetics/*metabolism ; Circular Dichroism ; Crystallography, X-Ray ; Gibberellins/metabolism/*pharmacology ; Models, Biological ; Models, Molecular ; Plant Growth Regulators/metabolism/*pharmacology ; Protein Binding ; Protein Structure, Tertiary/drug effects ; Receptors, Cell Surface/*chemistry/genetics/*metabolism ; Substrate Specificity
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 4
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    A membrane-anchored protein kinase involved in Brassica self-incompatibility signaling (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-03-06
    Description: Self-incompatibility (SI) response in Brassica is initiated by haplotype-specific interactions between the pollen-borne ligand S locus protein 11/SCR and its stigmatic S receptor kinase, SRK. This binding induces autophosphorylation of SRK, which is then thought to trigger a signaling cascade that leads to self-pollen rejection. A recessive mutation of the modifier (m) gene eliminates the SI response in stigma. Positional cloning of M has revealed that it encodes a membrane-anchored cytoplasmic serine/threonine protein kinase, designated M locus protein kinase (MLPK). Transient expression of MLPK restores the ability of mm papilla cells to reject self-pollen, suggesting that MLPK is a positive mediator of Brassica SI signaling.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Murase, Kohji -- Shiba, Hiroshi -- Iwano, Megumi -- Che, Fang-Sik -- Watanabe, Masao -- Isogai, Akira -- Takayama, Seiji -- New York, N.Y. -- Science. 2004 Mar 5;303(5663):1516-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Graduate School of Biological Sciences, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma 630-0101, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15001779" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Amino Acid Substitution ; Brassica rapa/enzymology/genetics/*physiology ; Cell Membrane/*enzymology ; Cloning, Molecular ; Cytoplasm/enzymology ; Flowers/enzymology/*physiology ; Genes, Plant ; Haplotypes ; Membrane Proteins/chemistry/genetics/*metabolism ; Mutation ; Open Reading Frames ; Phosphorylation ; Physical Chromosome Mapping ; Plant Proteins ; Pollen/physiology ; Protein Kinases/*metabolism ; Protein-Serine-Threonine Kinases/chemistry/genetics/*metabolism ; Recombinant Fusion Proteins/metabolism ; *Signal Transduction
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 5
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    Horizontal propagation of excitation in rat visual cortical slices revealed by optical imaging (1994)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1994-11-11
    Description: Optical imaging with high spatial and temporal resolution of neural activity in rat cortical slices was used to investigate the dynamics of signal transmission through neural connections in the visual cortex. When inhibition due to gamma-aminobutyric acid was slightly suppressed, horizontal propagation of excitation in both the supra- and infragranular layers became prominent. This propagation was not affected by vertical cuts in either the supra- or infragranular layer, which suggests that excitation is at least partially conveyed horizontally by reciprocal vertical connections between neurons in these layers.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tanifuji, M -- Sugiyama, T -- Murase, K -- New York, N.Y. -- Science. 1994 Nov 11;266(5187):1057-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Information Science, Fukui University, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7973662" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bicuculline/analogs & derivatives/pharmacology ; Electric Stimulation ; Electrodes ; In Vitro Techniques ; Light ; Rats ; Visual Cortex/*physiology ; Visual Pathways/*physiology ; gamma-Aminobutyric Acid/pharmacology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 6
    Electronic Resource
    Electronic Resource
    NGF Level Is Not Decreased in the Serum, Brain-Spinal Fluid, Hippocampus, or Parietal Cortex of Individuals with Alzheimer's Disease
    Amsterdam : Elsevier
    Biochemical and Biophysical Research Communications 193 (1993), S. 198-203 
    Details
    ISSN: 0006-291X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1006/bbrc.1993.1609
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  • 7
    Electronic Resource
    Electronic Resource
    Sulfated Glycolipids Are Ligands for a Lymphocyte Homing Receptor, L-Selectin (LECAM-1), Binding Epitope in Sulfated Sugar Chain
    Amsterdam : Elsevier
    Biochemical and Biophysical Research Communications 190 (1993), S. 426-434 
    Details
    ISSN: 0006-291X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1006/bbrc.1993.1065
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  • 8
    Electronic Resource
    Electronic Resource
    Carrier localization and impurity band conduction in GeSe
    Amsterdam : Elsevier
    Physica B+C 105 (1981), S. 70-73 
    Details
    ISSN: 0378-4363
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0378-4363(81)90217-5
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  • 9
    Electronic Resource
    Electronic Resource
    Electron spin resonance studies of ferrihaemoglobin M"O"s"a"k"a
    Amsterdam : Elsevier
    BBA - Biophysics Including Photosynthesis 120 (1966), S. 131-136 
    Details
    ISSN: 0926-6585
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0926-6585(66)90284-6
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  • 10
    Electronic Resource
    Electronic Resource
    Experimental studies on lung surfactant in deep hypothermia induced by surface cooling and warming
    Amsterdam : Elsevier
    Cryobiology 15 (1978), S. 713-714 
    Details
    ISSN: 0011-2240
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0011-2240(78)90192-X
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