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. 1990 Feb;64(2):584–591. doi: 10.1128/jvi.64.2.584-591.1990

Avian reticuloendotheliosis virus-transformed lymphoid cells contain multiple pp59v-rel complexes.

N Davis 1, W Bargmann 1, M Y Lim 1, H Bose Jr 1
PMCID: PMC249147  PMID: 2153225

Abstract

The v-rel oncogene of avian reticuloendotheliosis virus type T (REV-T) encodes a 59-kilodalton (kDa) phosphoprotein located principally in the cytosol of transformed lymphoid cells. All of the detectable pp59v-rel was present in high-molecular-weight complexes containing at least five cellular proteins (p124, p115, p75c-rel, p70hsc, and pp40). Antiserum was developed against the 40-kDa protein, the most abundant cellular protein associated with the complex. The 40-kDa phosphoprotein was complexed with pp59v-rel in REV-T-transformed lymphoid cell lines arrested at different stages of B-cell development as well as in lymphoid tumor cells and in fibrosarcomas. The half-life (8 h) of pp40 in REV-T-transformed lymphoid cells was the same as that of pp59v-rel. Antiserum against pp40 permitted the identification of two pp59v-rel complexes. The most abundant cytoplasmic complex contained approximately 75% of the pp59v-rel and all of the detectable pp40 in REV-T-transformed lymphoid cells. Twenty-five percent of the pp59v-rel was present in a minor complex that contained the majority of p75c-rel along with p115 and p124. In nuclear extracts of REV-T-transformed lymphoid cells, pp59v-rel was complexed with pp40. The two high-molecular-weight proteins (p115 and p124) and p75c-rel were not detected in the nuclear complex. In the cytosolic complexes, pp40 was heavily phosphorylated, whereas the nuclear form was much less extensively phosphorylated.

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Selected References

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