TY - JOUR A2 - Smits, Mari A. AU - Courtney, Harry S. AU - Pownall, Henry J. PY - 2010 DA - 2010/07/08 TI - The Structure and Function of Serum Opacity Factor: A Unique Streptococcal Virulence Determinant That Targets High-Density Lipoproteins SP - 956071 VL - 2010 AB - Serum opacity factor (SOF) is a virulence determinant expressed by a variety of streptococcal and staphylococcal species including both human and animal pathogens. SOF derives its name from its ability to opacify serum where it targets and disrupts the structure of high-density lipoproteins resulting in formation of large lipid vesicles that cause the serum to become cloudy. SOF is a multifunctional protein and in addition to its opacification activity, it binds to a number of host proteins that mediate adhesion of streptococci to host cells, and it plays a role in resistance to phagocytosis in human blood. This article will provide an overview of the structure and function of SOF, its role in the pathogenesis of streptococcal infections, its vaccine potential, its prevalence and distribution in bacteria, and the molecular mechanism whereby SOF opacifies serum and how an understanding of this mechanism may lead to therapies for reducing high-cholesterol concentrations in blood, a major risk factor for cardiovascular disease. SN - 2314-6133 UR - https://doi.org/10.1155/2010/956071 DO - 10.1155/2010/956071 JF - Journal of Biomedicine and Biotechnology PB - Hindawi Publishing Corporation KW - ER -