Structural highlights
Function
[EAF3_YEAST] Component of the NuA4 histone acetyltransferase complex which is involved in transcriptional activation of selected genes principally by acetylation of nucleosomal histone H4 and H2A. The NuA4 complex is also involved in DNA repair.[1] [2] [3]
Evolutionary Conservation
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
Publication Abstract from PubMed
Eaf3 is a component of both NuA4 histone acetyltransferase and Rpd3S histone deacetylase complexes in Saccharomyces cerevisiae. It is involved in the regulation of the global pattern of histone acetylation that distinguishes promoters from coding regions. Eaf3 contains a chromo domain at the N terminus that can bind to methylated Lys-36 of histone H3 (H3K36). We report here the crystal structures of the Eaf3 chromo domain in two truncation forms. Unlike the typical HP1 and Polycomb chromo domains, which contain a large groove to bind the modified histone tail, the Eaf3 chromo domain assumes an autoinhibited chromo barrel domain similar to the human MRG15 chromo domain. Compared with other chromo domains, the Eaf3 chromo domain contains a unique 38-residue insertion that folds into two short beta-strands and a long flexible loop to flank the beta-barrel core. Both isothermal titration calorimetry and surface plasmon resonance studies indicate that the interaction between the Eaf3 chromo domain and the trimethylated H3K36 peptide is relatively weak, with a K(D) of approximately 10(-4) m. NMR titration studies demonstrate that the methylated H3K36 peptide is bound to the cleft formed by the C-terminal alpha-helix and the beta-barrel core. Site-directed mutagenesis study and in vitro binding assay results show that the conserved aromatic residues Tyr-23, Tyr-81, Trp-84, and Trp-88, which form a hydrophobic pocket at one end of the beta-barrel, are essential for the binding of the methylated H3K36. These results reveal the molecular mechanism of the recognition and binding of the methylated H3K36 by Eaf3 and provide new insights into the functional roles of the Eaf3 chromo domain.
Molecular basis of the interaction of Saccharomyces cerevisiae Eaf3 chromo domain with methylated H3K36.,Sun B, Hong J, Zhang P, Dong X, Shen X, Lin D, Ding J J Biol Chem. 2008 Dec 26;283(52):36504-12. Epub 2008 Nov 4. PMID:18984594[4]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Eisen A, Utley RT, Nourani A, Allard S, Schmidt P, Lane WS, Lucchesi JC, Cote J. The yeast NuA4 and Drosophila MSL complexes contain homologous subunits important for transcription regulation. J Biol Chem. 2001 Feb 2;276(5):3484-91. Epub 2000 Oct 17. PMID:11036083 doi:http://dx.doi.org/10.1074/jbc.M008159200
- ↑ Reid JL, Moqtaderi Z, Struhl K. Eaf3 regulates the global pattern of histone acetylation in Saccharomyces cerevisiae. Mol Cell Biol. 2004 Jan;24(2):757-64. PMID:14701747
- ↑ Kobor MS, Venkatasubrahmanyam S, Meneghini MD, Gin JW, Jennings JL, Link AJ, Madhani HD, Rine J. A protein complex containing the conserved Swi2/Snf2-related ATPase Swr1p deposits histone variant H2A.Z into euchromatin. PLoS Biol. 2004 May;2(5):E131. Epub 2004 Mar 23. PMID:15045029 doi:10.1371/journal.pbio.0020131
- ↑ Sun B, Hong J, Zhang P, Dong X, Shen X, Lin D, Ding J. Molecular basis of the interaction of Saccharomyces cerevisiae Eaf3 chromo domain with methylated H3K36. J Biol Chem. 2008 Dec 26;283(52):36504-12. Epub 2008 Nov 4. PMID:18984594 doi:10.1074/jbc.M806564200
