3omc

Structure of human SND1 extended tudor domain in complex with the symmetrically dimethylated arginine PIWIL1 peptide R4me2s

spinqualitylabelsall models 3omc, resolution 1.77Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3omc is a 4 chain structure with sequence from Homo sapiens and Synthetic construct. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.77Å Ligands: 2MR, CL Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function SND1_HUMAN Functions as a bridging factor between STAT6 and the basal transcription factor. Plays a role in PIM1 regulation of MYB activity. Functions as a transcriptional coactivator for the Epstein-Barr virus nuclear antigen 2 (EBNA2). 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 Arginine methylation modulates diverse cellular processes and represents a molecular signature of germ-line-specific Piwi family proteins. A subset of Tudor domains recognize arginine methylation modifications, but the binding mechanism has been lacking. Here we establish that, like other germ-line Tudor proteins, the ancestral staphylococcal nuclease domain-containing 1 (SND1) polypeptide is expressed and associates with PIWIL1/Miwi in germ cells. We find that human SND1 binds PIWIL1 in an arginine methylation-dependent manner with a preference for symmetrically dimethylated arginine. The entire Tudor domain and a bifurcated SN domain are required for this binding activity, whereas the canonical Tudor domain alone is insufficient for methylarginine ligand binding. Crystal structures show that the intact SND1 extended Tudor domain forms a wide and negatively charged binding groove, which can accommodate distinct symmetrically dimethylated arginine peptides from PIWIL1 in different orientations. This analysis explains how SND1 preferentially recognizes symmetrical dimethylarginine via an aromatic cage and conserved hydrogen bonds, and provides a general paradigm for the binding mechanisms of methylarginine-containing peptides by extended Tudor domains. Structural basis for recognition of arginine methylated Piwi proteins by the extended Tudor domain.,Liu K, Chen C, Guo Y, Lam R, Bian C, Xu C, Zhao DY, Jin J, MacKenzie F, Pawson T, Min J Proc Natl Acad Sci U S A. 2010 Oct 26;107(43):18398-403. Epub 2010 Oct 11. PMID:20937909 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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