ELL2, a new member of an ELL family of RNA polymerase II elongation factors

Ali Shilatifard, D. Roxanne Duan, Dewan Haque, Charles Florence, William H. Schubach, Joan Weliky Conaway, Ronald C. Conaway

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110 Scopus citations


We recently isolated an RNA polymerase II elongation factor from rat liver nuclei and found it to be homologous to the product of the human ELL gene, a frequent target for translocations in acute myeloid leukemia. To further our understanding of the possible role(s) of ELL in transcriptional regulation and human disease, we initiated a search for ELL-related proteins. In this report we describe molecular cloning, expression, and characterization of human ELL2, a novel RNA polymerase II elongation factor 49% identical and 66% similar to ELL. Mechanistic studies indicate that ELL2 and ELL possess similar transcriptional activities. Structure-function studies localize the ELL2 elongation activation domain to an ELL2 N-terminal region that is highly homologous to ELL. Finally, Northern blot analysis reveals that the ELL2 and ELL genes are transcribed in many of the same tissues, but that the ratio of their transcripts exhibits tissue-to-tissue variation, raising the possibility that ELL2 and ELL may not perform completely general functions, but, instead, may perform gene- or tissue- specific functions.

Original languageEnglish (US)
Pages (from-to)3639-3643
Number of pages5
JournalProceedings of the National Academy of Sciences of the United States of America
Issue number8
StatePublished - Apr 15 1997
Externally publishedYes

ASJC Scopus subject areas

  • General


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