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  • Carbohydrate Sequence  (1)
  • EF-hand motif  (1)
  • Nature Publishing Group (NPG)  (1)
  • Wiley-Blackwell  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Species-specificity of the cohesin-dockerin interaction between Clostridium thermocellum and Clostridium cellulolyticum: Prediction of specificity determinants of the dockerin domain (1997)
    New York, NY : Wiley-Blackwell
    Proteins: Structure, Function, and Genetics 29 (1997), S. 517-527 
    Details
    ISSN: 0887-3585
    Keywords: cellulosome ; cellulases ; cohesin domain ; scaffoldin subunit ; EF-hand motif ; molecular modeling ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine
    Notes: The cross-species specificity of the cohesin-dockerin interaction, which defines the incorporation of the enzymatic subunits into the cellulosome complex, has been investigated. Cohesin-containing segments from the cellulosomes of two different species, Clostridium thermocellum and Clostridium cellulolyticum, were allowed to interact with cellulosomal (dockerin-containing) enzymes from each species. In both cases, the cohesin domain of one bacterium interacted with enzymes from its own cellulosome in a calcium-dependent manner, but the same cohesin failed to recognize enzymes from the other species. Thus, in the case of these two bacteria, the cohesin-dockerin interaction seems to be species-specific. Based on intra- and cross-species sequence comparisons among the different dockerins together with their known specificities, we tender a prediction as to the amino-acid residues critical to recognition of the cohesins. The suspected residues were narrowed down to only four, which comprise a repeated pair located within the calcium-binding motif of two duplicated sequences, characteristic of the dockerin domain. According to the proposed model, these four residues do not participate in the binding of calcium per se; instead, they appear to serve as recognition codes in promoting interaction with the cohesin surface. Proteins 29:517-527, 1997. © 1997 Wiley-Liss, Inc.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
  • 2
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    Fungal lipochitooligosaccharide symbiotic signals in arbuscular mycorrhiza (2011)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2011-01-07
    Description: Arbuscular mycorrhiza (AM) is a root endosymbiosis between plants and glomeromycete fungi. It is the most widespread terrestrial plant symbiosis, improving plant uptake of water and mineral nutrients. Yet, despite its crucial role in land ecosystems, molecular mechanisms leading to its formation are just beginning to be unravelled. Recent evidence suggests that AM fungi produce diffusible symbiotic signals. Here we show that Glomus intraradices secretes symbiotic signals that are a mixture of sulphated and non-sulphated simple lipochitooligosaccharides (LCOs), which stimulate formation of AM in plant species of diverse families (Fabaceae, Asteraceae and Umbelliferae). In the legume Medicago truncatula these signals stimulate root growth and branching by the symbiotic DMI signalling pathway. These findings provide a better understanding of the evolution of signalling mechanisms involved in plant root endosymbioses and will greatly facilitate their molecular dissection. They also open the way to using these natural and very active molecules in agriculture.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Maillet, Fabienne -- Poinsot, Verena -- Andre, Olivier -- Puech-Pages, Virginie -- Haouy, Alexandra -- Gueunier, Monique -- Cromer, Laurence -- Giraudet, Delphine -- Formey, Damien -- Niebel, Andreas -- Martinez, Eduardo Andres -- Driguez, Hugues -- Becard, Guillaume -- Denarie, Jean -- England -- Nature. 2011 Jan 6;469(7328):58-63. doi: 10.1038/nature09622.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratoire des Interactions Plantes-Microorganismes, UMR 441/2594 INRA-CNRS, B.P. 52627, F-31326 Castanet-Tolosan CEDEX, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21209659" target="_blank"〉PubMed〈/a〉
    Keywords: Carbohydrate Sequence ; Chromatography, High Pressure Liquid ; Daucus carota/chemistry/metabolism/microbiology ; Glomeromycota/metabolism ; Lipopolysaccharides/chemistry/*metabolism ; Medicago truncatula/chemistry/growth & development/metabolism/microbiology ; Molecular Sequence Data ; Mycorrhizae/*metabolism ; Plant Extracts/chemistry/metabolism ; Plant Roots/chemistry/growth & development/*metabolism/*microbiology ; Signal Transduction ; Spores, Fungal/chemistry/metabolism ; *Symbiosis
    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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