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  • Title: Domains of glycoprotein H of herpes simplex virus type 1 involved in complex formation with glycoprotein L.
    Author: Westra DF, Kuiperij HB, Welling GW, Scheffer AJ, The TH, Welling-Wester S.
    Journal: Virology; 1999 Aug 15; 261(1):96-105. PubMed ID: 10441558.
    Abstract:
    The complex formation between glycoproteins H (gH) and L (gL) of herpes simplex virus type 1 (HSV-1) was studied by using five recombinant baculoviruses expressing open reading frames that contain deletions in the coding region of the extracellular domain of gH. In addition, the gH-deletion mutants contained a C-terminal tag. Complex formation of gL and the gH-deletion mutants was studied by immunoprecipitations with anti-tag monoclonal antibody (MAb) A16 and with the gH-specific MAbs 37S, 46S, and 52S. All gH-deletion mutants were complexed to gL when analyzed by MAb A16. MAb 37S precipitated complexes between gL and the two gH-deletion mutants that contain the epitope of this MAb. When the gH conformation-dependent MAbs 46S and 52S were used, gL was coprecipitated together with the gH-deletion mutant lacking amino acids 31-299, but gL was not coprecipitated with the gH-deletion mutant lacking amino acids 31-473. The data from the precipitation studies do allow at least two interpretations. There is either one site for gL binding on gH (residue 300-473) or gL contacts multiple regions of gH. We were unable to demonstrate gL-dependent cell surface expression of either of the gH-deletion mutants. This suggests that the coassociation of gH with gL is necessary but not sufficient for transport of gH to the cell surface.
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