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Proceedings of the National Academy of Sciences of the United States of America logoLink to Proceedings of the National Academy of Sciences of the United States of America
. 1984 Jan;81(1):85–89. doi: 10.1073/pnas.81.1.85

Nucleotide sequence of the feline retroviral oncogene v-fms shows unexpected homology with oncogenes encoding tyrosine-specific protein kinases.

A Hampe, M Gobet, C J Sherr, F Galibert
PMCID: PMC344615  PMID: 6582485

Abstract

The nucleotide sequence encoding the transforming polyprotein of the McDonough strain of feline sarcoma virus was determined. This sequence includes 231 nucleotides specifying a leader peptide, 1,377 nucleotides encoding most of the feline leukemia virus-derived gag gene, and 2,969 nucleotides representing the viral transforming gene v-fms. A single open reading frame was predicted to encode a fusion polyprotein of 160,000 daltons (P160gag-fms). Fourteen potential sites for glycosylation were predicted within the v-fms-encoded portion of the protein, consistent with previous observations that the primary translation product is rapidly glycosylated. The presence of hydrophobic signal peptides within the amino-terminal leader sequence and in the middle of the v-fms-encoded moiety suggests that the transforming glycoprotein becomes oriented with its amino terminus within the lumen of the rough endoplasmic reticulum and its carboxyl terminus protruding across the membrane of the rough endoplasmic reticulum into the cytoplasm. The latter portion of the protein shows unexpected homology to tyrosine-specific protein kinases encoded by several of the known retroviral oncogenes.

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Selected References

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