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. 1992 Jul;83(7):714–722. doi: 10.1111/j.1349-7006.1992.tb01971.x

Differential Expression of Subspecies of Polyomavirus and Murine Leukemia Virus Enhancer Core Binding Protein, PEBP2, in Various Hematopoietic Cells

Masanobu Satake 1, Manabu Inuzuka 1, Katsuya Shigesada 2, Tsuneyuki Oikawa 3, Yoshiaki Ito 1,✉
PMCID: PMC5918933  PMID: 1325429

Abstract

The core sequence of the enhancer of murine leukemia virus (MuLV) long terminal repeat is highly conserved in a large number of MuLV strains and appears to play an essential role when SL3‐3 or Moloney strains induce T cell lymphoma in mice. We found by using the electrophoretic mobility shift assay that a polyomavirus enhancer core‐binding protein, PEBP2, bound to this core motif of MuLV. We also noted that PEBP2 in several hematopoietic cell lines derived from B lymphocyte, macrophage and myelocyte lineages migrated significantly faster than the authentic PEBP2 detected in NIH3T3 (ibroblasts. Interestingly, PEBP2 detected in the cell lines of T lymphocyte lineage appeared to contain both types, which were indistinguishable in electrophoretic mobility from those of NIH3T3 and of B lymphocyte, macrophage and myelocyte lineages. The treatment of the nuclear extract containing PEBP2 with phosphatase generated PEBP3, which is a subcomponent of PEBP2 and retained the same DNA‐binding specificity as PEBP2. The altered mobility of hematopoietic cell‐derived or T lymphocyte‐derived PEBP2 was found to be due to the alteration of the mobility of PEBP3. Based on the distinct mobility of PEBP2/3 of T lymphocytes from those of other hematopoietic cells, we discuss the implication of PEBP2 in MuLV‐induced T cell leukemia and T cell‐specific gene expression.

Keywords: Key words, Polyomavirus, Murine leukemia virus, Enhancer core, T lymphocytes, PEBP2

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