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. 1980 May;77(5):3009–3013. doi: 10.1073/pnas.77.5.3009

Characterization of the transforming gene of Fujinami sarcoma virus.

T Hanafusa, L H Wang, S M Anderson, R E Karess, W S Hayward, H Hanafusa
PMCID: PMC349536  PMID: 6248881

Abstract

The src gene present in all avian sarcoma viruses is not present in the genome of Fujinami sarcoma virus, a potent sarcoma-inducing virus in chickens. Fujinami virus is defective and requires helper virus for replication. RNA from a mixture of helper and transforming viruses consists of two components, 35S and 28S. Oligonucleotide fingerprinting of each RNA component revealed that the 35S component was identical to the RNA of the helper virus. Thus, the genome of Fujinami virus must be the 28S RNA, which corresponds approximately to a molecular weight of 1.7 x 10(6) or 5300 nucleotides. Fujinami viral RNA shares several oligonucleotides with helper viral RNA at both 3' and 5' ends but contains a unique sequence of at least 3000 nucleotides in the middle of the genome. Fujinami viral RNA contains no src-specific oligonucleotides of the Rous sarcoma virus genome and did not hybridize with DNA complementary to the src sequences. The 60,000-dalton src protein of Rous sarcoma virus was undetectable in Fujinami virus-transformed cells. Instead, these transformed cells contain a protein of 140,000 daltons precipitable by antisera against virion proteins, which is likely to be the transforming protein of this virus.

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Selected References

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