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  • Artikel: DFG Deutsche Nationallizenzen  (5)
  • solid-phase synthesis  (3)
  • Anticancer drugs  (1)
  • Backbone conformation  (1)
  • Biochemistry  (1)
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  • Artikel: DFG Deutsche Nationallizenzen  (5)
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  • 1
    ISSN: 1573-501X
    Schlagwort(e): Scaffold design ; Backbone conformation ; Topography ; Chi space ; Topographical design
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Summary A critical issue in drug discovery utilizing combinatorial chemistry as part of the discovery process is the choice of scaffolds to be used for a proper presentation, in a three-dimensional space, of the critical elements of structure necessary for molecular recognition (binding) and information transfer (agonist/ antagonist). In the case of polypeptide ligands, considerations related to the properties of various backbone structures (α-helix, β-sheets, etc.; φ, ψ space) and those related to three-dimensional presentation of side-chain moieties (topography; χ (chi) space) must be addressed, although they often present quite different elements in the molecular recognition puzzle. We have addressed aspects of this problem by examining the three-dimensional structures of chemically different scaffolds at various distances from the scaffold to evaluate their putative diversity. We find that chemically diverse scaffolds can readily become topographically similar. We suggest a topographical approach involving design in chi space to deal with these problems.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    ISSN: 1573-501X
    Schlagwort(e): Combinatorial chemical libraries ; Anticancer drugs ; Tumor cell line screening
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Summary A single-step cancer cell cytotoxic assay system for anticancer drug discovery has been developed which facilitates rapid screening of large combinatorial chemical libraries synthesized using the ‘one-bead-one-compound’ (OBOC) methodology. Each OBOC library bead incorporates two orthogonally cleavable linkers that release the bead-bound compound at a different pH. The assay utilizes high concentrations of tumor cells mixed directly with OBOC beads and plated in soft agarose containing tissue culture medium. One of the orthogonal linkers is cleaved at neutral pH in tissue culture releasing an aliquot of compound to diffuse at a relatively high local concentration into the soft agarose immediately surrounding the bead. Active compounds are identified visually from a clear ring of tumor cell lysis which forms within 48 h around just the rare bead releasing a cytotoxic compound. The bead releasing a cytotoxin is then plucked from the agar and the remaining compound still linked to the bead can be released for structural analysis, followed by compound resynthesis and confirmatory testing. This assay system has been successfully applied to identification of lead cytotoxic compounds from model peptidic and non-peptidic combinatorial chemical libraries. Use of this methodology may facilitate anticancer drug discovery.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    New York : Wiley-Blackwell
    Biopolymers 47 (1998), S. 353-363 
    ISSN: 0006-3525
    Schlagwort(e): safety-catch linkers ; multiply cleavable linkers ; solid-phase synthesis ; combinatorial chemistry ; Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: This review article focuses on concepts that incorporate safety-catch and multiply cleavable linkers in solid-phase synthesis. Discussed are specific applications of such linkers in the synthesis of peptides, peptide mimetics, and “small” organic molecules, as well as their limitations for particular chemistries and reaction conditions. © 1999 John Wiley & Sons, Inc. Biopoly 47: 353-363, 1998
    Zusätzliches Material: 18 Ill.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    New York : Wiley-Blackwell
    Biopolymers 47 (1998), S. 397-404 
    ISSN: 0006-3525
    Schlagwort(e): solid-phase synthesis ; planar supports ; cotton ; continuous synthesis ; libraries ; Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: Planar supports represent a unique opportunity in designing novel approaches to solid-phase synthesis of peptides and small organic molecules. Published work includes assembly on cellulose paper sheets, cotton strips, or membranes, as well as ultrahigh-density synthesis on glass supports. Planar carriers allow for the synthesis to be performed without any reaction vessels (inclusion volume chemistry), construction of libraries with only one representation of each structure, or for continuous synthesis (replacing sequence in time by sequence in space). © 1999 John Wiley & Sons, Inc. Biopoly 47: 397-404, 1998
    Zusätzliches Material: 3 Ill.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 5
    Digitale Medien
    Digitale Medien
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Peptide Science 2 (1996), S. 240-244 
    ISSN: 1075-2617
    Schlagwort(e): solid-phase synthesis ; peptide synthesis ; multiple synthesis ; inclusion volume synthesis ; Chemistry ; Biochemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: Solid-phase synthesis of peptides was carried out using only the volume of the solvent included in the swollen solid-phase resin beads [inclusion volume synthesis]. This approach enables (i) the use of higher concentrations of activated amino acids, resulting in increased coupling rates, (ii) drastically decreased consumption of solvents, and (iii) the construction of multiple peptide synthesizers having virtually no reaction vessels.
    Zusätzliches Material: 1 Ill.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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