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    Extracellular matrix protein receptors in Drosophila melanogaster

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    Author
    Futch, Tracy Ann
    Issue Date
    2004
    Keywords
    Biology, Molecular.
    Advisor
    Brower, Danny L.
    
    Metadata
    Show full item record
    Publisher
    The University of Arizona.
    Rights
    Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
    Abstract
    The extracellular matrix (ECM) is defined as the many different proteins and secreted substances between cells. The ECM plays a major role in the signaling pathways that stimulate cells to perform many varied functions, ranging from control of gene expression at the cellular level to differentiation and development of tissues, organs, and ultimately the entire organism. A portion of this work describes the identification of the division abnormally delayed gene, which encodes a proteoglycan, that is involved in growth factor reception with important developmental consequences in Drosophila melanogaster. The remainder of this work deals with three Drosophila homologs of vertebrate proteins that may interact with integrins, a family of cell surface receptors for extracellular matrix ligands. The three integrin-interacting proteins are referred to by their vertebrate names, and include CD81, a member of the tetraspanin family, ILK, integrin-linked kinase, and CD98hc, a type II transmembrane glycoprotein which is the heavy chain of a multi-protein complex. In this work, the mutant phenotype of CD98hc is larval lethal and not temperature sensitive. Clonal analyses of CD98hc mutants show no phenotype of mutant clones in the eye. Genetic interactions in adult tissues or interactions affecting larval lethality between CD98hc and Drosophila integrin mutants were not observed, and it remains unclear whether CD98hc physically interacts with Drosophila integrins in tissue culture cells. Since no correlation was seen between the interactions of CD98hc and integrins in vertebrate cells and similar putative interactions in flies, this raises the question as to what role, if any, does CD98hc play as an integrin modulator in this organism.
    Type
    text
    Dissertation-Reproduction (electronic)
    Degree Name
    Ph.D.
    Degree Level
    doctoral
    Degree Program
    Graduate College
    Molecular and Cellular Biology
    Degree Grantor
    University of Arizona
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