Abstract: Stabilized forms of gp120 polypeptide, nucleic acids encoding these stabilized forms, vectors comprising these nucleic acids, and methods of using these polypeptides, nucleic acids, vectors and host cells are disclosed. Crystal structures and computer systems including atomic coordinates for stabilized forms of gp120, and gp120 with an extended V3 loop, and methods of using these structures and computer systems are also disclosed.

Abstract: Disclosed are antigens that include a target epitope that is defined by atomic coordinates of those amino acids of the antigen that contact an antibody of interest that specifically binds the antigen. The disclosed antigens have between about 10% and about 90% of surface exposed amino acid residues located exterior of the target epitope substituted as compared to a wild-type antigen and less than about 10% of the non-surface exposed amino acid residues substituted as compared to a wild-type antigen. Also disclosed are nucleic acids encoding these antigens and methods of producing these antigens. Methods for generating an immune response in a subject are also disclosed. In some embodiments, the method is a method for treating or preventing a human immunodeficiency type 1 (HIV-1) infection in a subject.

Abstract: Stabilized forms of gp120 polypeptide, nucleic acids encoding these stabilized forms, vectors comprising these nucleic acids, and methods of using these polypeptides, nucleic acids, vectors and host cells are disclosed. Crystal structures and computer systems including atomic coordinates for stabilized forms of gp120, and gp120 with an extended V3 loop, and methods of using these structures and computer systems are also disclosed.

Abstract: Computational protocols for the design of epitope-protein scaffolds which elicit selected neutralizing antibodies are disclosed, and related compositions and uses.

Abstract: Stabilized forms of gp120 polypeptide, nucleic acids encoding these stabilized forms, vectors comprising these nucleic acids, and methods of using these polypeptides, nucleic acids, vectors and host cells are disclosed. Crystal structures and computer systems including atomic coordinates for stabilized forms of gp120, and gp120 with an extended V3 loop, and methods of using these structures and computer systems are also disclosed.

Abstract: The present disclosure relates to stabilized forms of the HIV gp120 envelope protein in complex with the broadly neutralizing CD4-binding site antibody b12, to crystalline forms of the stabilized forms of the HIV gp120 envelope protein in complex with the broadly neutralizing CD4-binding site antibody b12, and to the high resolution structure obtained from these crystals by X-ray diffraction methods. Methods for identifying immunogenic polypeptides based on these structures are also disclosed.