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  • 1
    Electronic Resource
    Electronic Resource
    Computational simulations of stem-cell factor/c-Kit receptor interaction (1996)
    New York, NY : Wiley-Blackwell
    Proteins: Structure, Function, and Genetics 26 (1996), S. 42-54 
    Details
    ISSN: 0887-3585
    Keywords: cell surface receptors ; hematopoietic factors ; cytokines ; structure prediction ; homology modeling ; molecular dynamics ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine
    Notes: Stem-cell factor (SCF) is a noncovalent homodimeric cytokine that exhibits profound biological function in the early stages of hematopoiesis by binding to a cell surface tyrosine kinase receptor that is encoded by the c-Kit proto-oncogene. The results obtained from a combined implementation of homology-based molecular modeling and computational simulations in the study of species-specific SCF/c-Kit interactions are reported. The structural models of the human and rat SCF ligands are based on the close structural similarity to the cytokine M-CSF, whose Cα structure has recently become available. The constant domains of the human Fc fragment are used as a template for the ligand binding domains of the c-Kit receptor. The factors responsible for the stabilization of the SCF quaternary structure and the molecular determinants for ligand recognition and ligand specificity have been identified by assessing the conformational, topographical, and dynamic features of the isolated ligands and of the ligand-receptor complexes. © 1996 Wiley-Liss, Inc.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
  • 2
    Electronic Resource
    Electronic Resource
    Theoretical investigation of IL-6 multiprotein receptor assembly (1997)
    New York, NY : Wiley-Blackwell
    Proteins: Structure, Function, and Genetics 29 (1997), S. 528-548 
    Details
    ISSN: 0887-3585
    Keywords: cytokines ; IL-6 ; IL-6 receptor complexes ; electrostatic potential ; homology modeling ; molecular dynamics ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine
    Notes: Interleukin-6 (IL-6) is a multifunctional cytokine that regulates cell growth, differentiation, and cellular functions in many cell lineages. Recently, evidences for the formation of an active hexameric complex with an IL-6:IL-6Rα:gp130 stoichiometry of 2:2:2 have been obtained by different experimental approaches. Analysis of the electrostatic potential complementarity between IL-6 and its receptors has been used, in this study, to guide the assembly of homology-based 3D models of the components. The results strongly support a mechanism whereby the active cytokine (IL-6:IL-6Rα) associates with the signal transducing gp130 protein, and the trimeric complex formed further dimerizes to form the hexameric species. Furthermore, computational simulations of the multiprotein complexes provide a rationalization of data from mutation experiments and highlight some key protein-protein interactions which have not yet been the subject of mutagenesis studies. Proteins 29:528-544, 1997. © 1997 Wiley-Liss, Inc.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
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