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Identification of sex hormone binding globulin-interacting proteins in the brain using phage display screening

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The present study reports the identification of human sex hormone binding globulin (SHBG)-interacting proteins in the brain using a phage display-based screening technology. Phage display is a system in which a foreign protein is displayed on the surface of a bacteriophage as a fusion protein with one of the coat proteins of the bacteriophage. T7 phage clones expressing normal human brain proteins (human normal brain phage-display cDNA expression library) were screened using SHBG as bait. The bound phage clones were then identified by DNA sequencing and by BLAST search analysis. Of the twenty binding proteins analyzed, three were found to be membrane-associated proteins: synaptosomal associated protein 25 (SNAP25), Thy-1 cell surface antigen and zonadhesin. Further studies will determine if the interactions of SHBG with these proteins have any role in the internalization and cell signaling events or whether they contribute to steroid delivery to specific cells.
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Document Type: Research Article

Affiliations: Department of Biomedical Sciences, University of Illinois College of Medicine, Rockford, IL 61107, USA., Email: [email protected]

Publication date: January 1, 2009

More about this publication?
  • The International Journal of Molecular Medicine is a monthly, peer-reviewed journal devoted to the publication of high quality studies related to the molecular mechanisms of human disease. The journal welcomes research on all aspects of molecular and clinical research, ranging from biochemistry to immunology, pathology, genetics, human genomics, microbiology, molecular pathogenesis, molecular cardiology, molecular surgery and molecular psychology.

    The International Journal of Molecular Medicine aims to provide an insight for researchers within the community in regard to developing molecular tools and identifying molecular targets for the diagnosis and treatment of a diverse number of human diseases.
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