title: Molecular structure of adeno-associated virus variant DNA.
abstract: When lysates of human cells, infected jointly with the defective parvovirus, adeno-associated virus (AAV), and a helper adenovirus, are banded to equilibrium in CsCl buoyant density gradients, virus particles of various densities are obtained. Infectious AAV particles mainly band at a density of 1.41 g/cm3 with a minor component at 1.45 g/cm3. Noninfectious AAV particles band at densities between 1.41 and 1.32 g/cm3. We have analyzed, by mapping with site-specific endodeoxyribonucleases, the molecular structure of the variant AAV DNA molecules obtained from these light density particles. The size of variant DNA molecules ranged from 100 to 3% of genome length. In general, the variant DNAs are deleted for internal regions but retain the genome termini. Some of the variant DNAs appear to be cross-linked, spontaneously renaturing molecules having structures analogous to replicating forms of AAV DNA.
mesh_terms: D000260:Adenoviruses, Human / Q000032:analysis*; D002277:Carcinoma; D002460:Cell Line; D004262:DNA Restriction Enzymes; D004279:DNA, Viral / Q000032:analysis*; D004591:Electrophoresis, Polyacrylamide Gel; D014644:Genetic Variation; D006801:Humans; D008970:Molecular Weight; D009062:Mouth Neoplasms
chemical_list: D004279:DNA, Viral; D004262:DNA Restriction Enzymes