5czy | pdb_00005czy

Crystal structure of LegAS4

spinqualitylabelsall models 5czy, resolution 2.20Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 5czy is a 1 chain structure with sequence from Legionella pneumophila subsp. pneumophila str. Philadelphia 1. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: GOL, SAM Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function Q5ZUS4_LEGPH Publication Abstract from PubMed The SET domain of LegAS4, a type IV secretion system effector of Legionella pneumophila, is a eukaryotic protein motif involved in histone methylation and epigenetic modulation. The SET domain of LegAS4 is involved in the modification of Lys4 of histone H3 (H3K4) in the nucleolus of the host cell, thereby enhancing heterochromatic rDNA transcription. Moreover, LegAS4 contains an ankyrin repeat domain of unknown function at its C-terminal region. Here, we report the crystal structure of LegAS4 in complex with S-adenosyl-l-methionine (SAM). Our data indicate that the ankyrin repeats interact extensively with the SET domain, especially with the SAM-binding amino acids, through conserved residues. Conserved surface analysis marks Glu159, Glu203, and Glu206 on the SET domain serve as candidate residues involved in interaction with the positively charged histone tail. Conserved surface residues on the ankyrin repeat domain surround a small pocket, which is suspected to serve as a binding site for an unknown ligand. Crystal structure of Legionella pneumophila type IV secretion system effector LegAS4.,Son J, Jo CH, Murugan RN, Bang JK, Hwang KY, Lee WC Biochem Biophys Res Commun. 2015 Oct 2;465(4):817-24. doi:, 10.1016/j.bbrc.2015.08.094. Epub 2015 Aug 24. PMID:26315269 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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