Pathogenic potential of myeloblastosis-associated virus: implication of env proteins for osteopetrosis induction.
To identify the nucleotide sequences responsible for the tumorigenic specificity of myeloblastosis-associated virus (MAV) we have established the complete nucleotide sequences of three infectious clones inducing either both osteopetrosis and nephroblastoma [MAV2(O)/2 and MAV2(O)p9] or only nephroblastoma [MAV1(N)], and compared their biological properties in the same chicken host strain. The MAV2(O)p9 originally described as a type 2 strain was found to carry a hybrid env gene containing sequences of both the types 1 and 2, and it induced milder and less rapid osteopetrosis than the original MAV2(O) clone when injected into Brown Leghorn chickens. These results, together with sequence comparisons between the MAV strains examined, suggest that subtle changes in the primary structure of the TM env protein's extracellular domain are likely to affect the tumorigenic potential of MAV.
Laboratoire d'Oncologie Virale et Moléculaire, Institut Curie, Centre Universitaire, Orsay, France.
V
V
Joliot
K
K
Boroughs
F
F
Lasserre
J
J
Crochet
G
G
Dambrine
R E
RE
Smith
B
B
Perbal
D000595:Amino Acid Sequence; D000818:Animals; D009189:Avian Myeloblastosis Virus / Q000472:pathogenicity*; D001483:Base Sequence; D002645:Chickens; D004279:DNA, Viral; D015686:Gene Products, env / Q000235:genetics / Q000378:metabolism / Q000502:physiology*; D007680:Kidney Neoplasms / Q000382:microbiology; D008969:Molecular Sequence Data; D010022:Osteopetrosis / Q000382:microbiology*; D017386:Sequence Homology, Amino Acid; D012689:Sequence Homology, Nucleic Acid; D009396:Wilms Tumor / Q000382:microbiology
D004279:DNA, Viral; D015686:Gene Products, env