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. 1991 Feb;11(2):886–893. doi: 10.1128/mcb.11.2.886

Structure and expression of a gene encoding a putative GTP-binding protein identified by provirus integration in a transgenic mouse strain.

K Mooslehner 1, U Müller 1, U Karls 1, L Hamann 1, K Harbers 1
PMCID: PMC359740  PMID: 1899287

Abstract

The Mov-10 mouse strain was derived by infection of preimplantation embryos with the Moloney murine leukemia virus and carries one copy of the provirus in its germ line. Here we show that the provirus has integrated into an evolutionarily conserved gene that can code for a protein of 110 kDa containing the three consensus elements characteristic for GTP-binding proteins. The Mov-10 locus was expressed in a variety of cell types, including embryonal carcinoma and embryonic stem cells. Transcription of the gene was down-regulated about 10-fold when F9 embryonal carcinoma cells are differentiated into parietal endodermlike cells and about 2-fold when they are differentiated into visceral endodermlike cells. High levels of Mov-10 transcripts were also found at different stages of embryonal development and in the testes and thymus of adult animals. Expression was cell cycle controlled, with steady-state RNA levels significantly higher in growth-arrested than in growth-stimulated cells. The results suggest that the Mov-10 locus has an important function in development and/or control of cell proliferation. The provirus was shown to have integrated into intron 1 of the gene without disrupting expression, indicating that integration into intronic sequences of a transcription unit does not necessarily affect transcription. This result together with previous results from the Mov-13 mouse strain suggested that proviruses exert their mutagenic effect only by integration in specific sites, such as cis-regulatory DNA elements.

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Selected References

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