摘要:
The vaccines and methods of the present invention are based on deletion mutations in the protein transmembrane domains of membrane-enveloped viruses. The strategy for production of these mutations is based on the fact that unlike mammalian cell membranes, the membranes of insect cells contain no cholesterol; thus are thinner than mammalian membranes. Many membrane-coated viruses have membrane glycoproteins on their surface which are responsible for identifying and infecting target cells. These membrane glycoproteins have hydrophobic membrane-spanning domains which anchor the proteins in the membrane bilayer. The membrane-spanning domains of these transmembrane proteins must be long enough to reach from one side of the bilayer to the other in order to hold the proteins in the membrane. Provided is a vaccine, a method of producing this vaccine, and a method of using this vaccine, based on the differences between membranes of viruses replicated in invertebrates and membranes of viruses replicated in vertebrates.
摘要:
Novel attenuating deletions of Chikungunya virus E2 polypeptides are provided as are attenuated viruses comprising the deletions. Also provided are immunogenic compositions comprising the attenuated viruses and methods of producing such viruses in cells (such as insect cells). Viruses of the embodiments can be used for immunization of animals to provide protection from the pathogenic effects of Chikungunya virus infection.
摘要:
Methods and compositions concerning mutant flaviviruses with host range mutations. In some embodiments the invention concerns nucleotide sequences that encode mutant flavivirus proteins. Viruses comprising these sequences that display reduced replication in mammalian cells are provided. In further aspects of the invention, flavivirus vaccine compositions are provided. In another embodiment the invention provides methods for vaccination against flavivirus infection.
摘要:
Methods and compositions concerning mutant flaviviruses with host range mutations. In some embodiments the invention concerns nucleotide sequences that encode mutant flavivirus proteins. Viruses comprising these sequences that display reduced replication in mammalian cells are provided. In further aspects of the invention, flavivirus vaccine compositions are provided. In another embodiment the invention provides methods for vaccination against flavivirus infection.
摘要:
The vaccines and methods of the present invention are based on deletion mutations in the protein transmembrane domains of membrane-enveloped viruses. The strategy for production of these mutations is based on the fact that unlike mammalian cell membranes, the membranes of insect cells contain no cholesterol; thus are thinner than mammalian membranes. Many membrane-coated viruses have membrane glycoproteins on their surface which are responsible for identifying and infecting target cells. These membrane glycoproteins have hydrophobic membrane-spanning domains which anchor the proteins in the membrane bilayer. The membrane-spanning domains of these transmembrane proteins must be long enough to reach from one side of the bilayer to the other in order to hold the proteins in the membrane. Provided is a vaccine, a method of producing this vaccine, and a method of using this vaccine, based on the differences between membranes of viruses replicated in invertebrates and membranes of viruses replicated in vertebrates.
摘要:
Cleavage site for the protease furin is inserted between domains of a membrane glycoprotein. Upon cleavage by furin in the trans-Golgi network, the protein is separated into individual membrane-free domain that retains its native conformation. This protocol can be used to produce virus membrane protein domains for structural analysis and for trials as vaccines.
摘要:
The present invention is directed to genetically engineered, membrane-enveloped viruses with deletion mutations in the protein transmembrane domains. Also provided are viral vaccines based on the engineered viruses, methods of producing and using such vaccines.