Structural study of a small molecule receptor bound to dimethyllysine in lysozyme† †Electronic supplementary information (ESI) available: Fig. S1: crystals of the lysozyme-KMe2:sclx4 complex grown at different sclx4 concentrations. Fig. S2: crystals of the complex grown in the presence of chloride- and sulfate-containing salts. Fig. S3: 1D 1H NMR spectra of lysozyme-KMe2 in buffer and DMSO mixtures. Table S1: summary of crystallization conditions, data collection and refinement statistics. Movie S1: MD simulation snapshots of sclx4 binding to Lys116-Me2. See DOI: 10.1039/c4sc02383h Click here for additional data file. Click here for additional data file.
نویسندگان
چکیده
Lysine is a ubiquitous residue on protein surfaces. Post translational modifications of lysine, including methylation to the mono-, di- or trimethylated amine result in chemical and structural alterations that have major consequences for protein interactions and signalling pathways. Small molecules that bind to methylated lysines are potential tools to modify such pathways. To make progress in this direction, detailed structural data of ligands in complex with methylated lysine is required. Here, we report a crystal structure of p-sulfonatocalix[4]arene (sclx4) bound to methylated lysozyme in which the lysine residues were chemically modified from Lys-NH3+ to Lys-NH(Me2)+. Of the six possible dimethyllysine sites, sclx4 selected Lys116-Me2 and the dimethylamino substituent was deeply buried in the calixarene cavity. This complex confirms the tendency for Lys-Me2 residues to form cation-π interactions, which have been shown to be important in protein recognition of histone tails bearing methylated lysines. Supporting data from NMR spectroscopy and MD simulations confirm the selectivity for Lys116-Me2 in solution. The structure presented here may serve as a stepping stone to the development of new biochemical reagents that target methylated lysines.
منابع مشابه
Structural study of a small molecule receptor bound to dimethyllysine in lysozyme
School of Chemistry, National University of Ireland. E-mail: [email protected] Department of Chemistry, University of Vict School of Biochemistry and Immunology, T † Electronic supplementary information lysozyme-KMe2:sclx4 complex grown at d crystals of the complex grown in sulfate-containing salts. Fig. S3: 1D H N and DMSO mixtures. Table S1: summa collection and renement statistics....
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1Chemical Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA 2Department of Chemistry, University of California – Berkeley, Berkeley, CA 94720, USA 3Advanced Light Source, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA 4National Security Directorate, Pacific Northwest National Laboratory, 902 Battelle Blvd., Rich...
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