Members of this family act as transcriptional transactivators of ELL and ELL2 elongation activities [1][2][3]. Eaf proteins form a stable heterodimer complex with ELL proteins to facilitate the binding of RNA polymerase II to activate transcription elongation. The N-terminus of approx 120 residues is globular and highly conserved [4].

1: EAF1, a novel ELL-associated factor that is delocalized by expression of the MLL-ELL fusion protein. Simone F, Polak PE, Kaberlein JJ, Luo RT, Levitan DA, Thirman MJ; Blood. 2001;98:201-209. PMID:11418481

2: ELL and EAF1 are Cajal body components that are disrupted in MLL-ELL leukemia. Polak PE, Simone F, Kaberlein JJ, Luo RT, Thirman MJ; Mol Biol Cell. 2003;14:1517-1528. PMID:12686606

3: ELL-associated factors 1 and 2 are positive regulators of RNA polymerase II elongation factor ELL. Kong SE, Banks CA, Shilatifard A, Conaway JW, Conaway RC; Proc Natl Acad Sci U S A. 2005;102:10094-10098. PMID:16006523

4: Identification and Characterization of a Schizosaccharomyces pombe RNA Polymerase II Elongation Factor with Similarity to the Metazoan Transcription Factor ELL. Banks CA, Kong SE, Spahr H, Florens L, Martin-Brown S, Washburn MP, Conaway JW, Mushegian A, Conaway RC; J Biol Chem. 2007;282:5761-5769. PMID:17150956