title: Nucleotide sequence comparison of the 3' regions of avian retroviruses NY203 and NTRE-2.
abstract: We have been characterizing molecular clones of two subgroup E avian retroviruses (NTRE-2 and NY203RAV-60) that produce different proliferative diseases after inoculation into susceptable K28 chickens. Both viruses arose by recombination between exogenous and endogenous viral genomes. To further characterize regions of these viruses that are important for the production of disease, we have determined the nucleotide sequence of a 1.2-kb EcoRI fragment extending from the carboxyl end of gp85 through 150 bases of the U3 region of the LTR. From the sequence data it is possible to precisely define one point where recombination occurred between PrRSV-B and RAV-0 to produce NTRE-2. We suggest a hypothesis, based on the core enhancer consensus sequence, for the higher incidence of disease when chickens are infected with viruses bearing the LTR of NY203RAV-60.
mesh_terms: D000818:Animals; D001354:Avian Leukosis Virus / Q000235:genetics* / Q000472:pathogenicity; D001483:Base Sequence; D002471:Cell Transformation, Neoplastic; D002472:Cell Transformation, Viral; D002645:Chickens; D003001:Cloning, Molecular; D004262:DNA Restriction Enzymes; D015246:Deoxyribonuclease EcoRI; D004742:Enhancer Elements, Genetic; D005814:Genes, Viral; D009857:Oncogenes; D011995:Recombination, Genetic; D012091:Repetitive Sequences, Nucleic Acid; D012689:Sequence Homology, Nucleic Acid
chemical_list: D004262:DNA Restriction Enzymes; D015246:Deoxyribonuclease EcoRI