Characterization of a p30 fraction from Rauscher leukemia virus which has an associated ATPase activity

A. L. Meric, M. J. Purtell, C. C. Levy

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2 Scopus citations


The p30 antigen from Rauscher leukemia virus (R-MuLV) was separated into two fractions by chromatography on either phosphocellulose or DEAE-cellulose. The p30-I and p30-II were indistinguishable immunologically or by isoelectrofocusing and gel electrophoresis. An ATPase activity was tightly associated with p30-II that could not be separated by ion-exchange chromatography, isoelectrofocusing, or glycerol velocity gradient sedimentation. The ATPase hydrolyzed the γ phosphate from only ATP or dATP. Immunoglobulin directed against R-MuLV p30 completely inhibited the p30-II associated ATPase. Glycerol velocity gradient analysis showed that p30-I sedimented as a 30-kDa species while the p30-II and its associated ATPase sedimented as a 60-kDa form by treatment with 0.2% (w/v) lithium dodecyl sulfate, suggesting that it represented a complexed species of p30. Finally, p30-II was found to stimulate the activity of R-MuLV reverse transcriptase, but p30-I had no effect on the activity of the enzyme. These results suggested the existence of at least two different forms of p30 in R-MuLV.

Original languageEnglish (US)
Pages (from-to)12865-12872
Number of pages8
JournalJournal of Biological Chemistry
Issue number20
StatePublished - 1984

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology
  • Cell Biology


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