4afl | pdb_00004afl

The crystal structure of the ING4 dimerization domain reveals the functional organization of the ING family of chromatin binding proteins.

spinqualitylabelsall models 4afl, resolution 2.27Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4afl is a 6 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. NonStd Res: MSE Related: 2vnf Resources: FirstGlance, OCA, RCSB, PDBsum Publication Abstract from PubMed The protein ING4 binds to histone H3 trimethylated at Lys4 (H3K4me3) through its C-terminal PlantHomeoDomain (PHD), thus recruiting the HBO1 histone acetyltransferase complex to target promoters. The structure of the PHD finger bound to an H3K4me3 peptide has been described, as well as the disorder and flexibility in the ING4 central region. We report the crystal structure of the ING4 N-terminal domain, which shows an antiparallel coiled-coil homodimer with each protomer folded into a helix-loop-helix structure. This arrangement suggests that ING4 can bind simultaneously two histone tails, on the same or different nucleosomes. Dimerization has a direct impact on ING4 tumor suppressor activity since monomeric mutants lose the ability of inducing apoptosis after genotoxic stress. Homology modeling based on the ING4 structure suggests that other ING dimers may also exist. The crystal structure of the inhibitor of growth 4 (ING4) dimerization domain reveals the functional organization of the ING family of chromatin binding proteins.,Culurgioni S, Munoz IG, Moreno A, Palacios A, Villate M, Palmero I, Montoya G, Blanco FJ J Biol Chem. 2012 Feb 9. PMID:22334692 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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