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. 1983 Dec;80(24):7428–7432. doi: 10.1073/pnas.80.24.7428

cis and trans activation of globin gene transcription in transient assays.

R Treisman, M R Green, T Maniatis
PMCID: PMC389964  PMID: 6200874

Abstract

We examined the effects of the simian virus 40 enhancer sequence on transcription of cloned human alpha- and beta-globin genes shortly after their introduction into cultured mammalian cells. We find that (i) detectable transcription of the beta-globin gene but not the alpha-globin gene requires linkage to the enhancer; (ii) the enhancer increases the amount of beta-globin RNA at least 100-fold but results in only a 5- to 10-fold increase in the amount of alpha-globin RNA; (iii) plasmid replication does not increase the level of beta-globin RNA, regardless of linkage to the enhancer, but does result in an approximately equal to 50-fold increase in the level of alpha-globin RNA; (iv) the enhancer is not required for and does not increase transcription of either gene in 293 cells, an adenovirus 5-transformed human kidney cell line. We also show that an enhancer sequence is not required for activity of the normally enhancer-dependent simian virus 40 early promoter in 293 cells, indicating that these cells contain a trans-acting factor(s) that circumvents the requirement for the enhancer sequence.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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