Publication

Structural study of a small molecule receptor bound to dimethyllysine in lysozyme

McGovern, Róise E.
; 
Snarr, Brendan D.
; 
Lyons, Joseph A.
; 
McFarlane, James
; 
Whiting, Amanda L.
; 
Paci, Irina
; 
Hof, Fraser
; 
Crowley, Peter B.
Identifiers
http://hdl.handle.net/10379/12791
 https://doi.org/10.13025/27601
Publication Date
2015-01-01
Keywords
egg-white lysozyme, epigenetic reader protein, modified histone tail, synthetic receptor, lysine methylation, macromolecular crystallography, supramolecular hosts, cytochrome-c, recognition, binding
Type
Article
Downloads
Show all metadata
Citation
McGovern, Róise E. Snarr, Brendan D.; Lyons, Joseph A.; McFarlane, James; Whiting, Amanda L.; Paci, Irina; Hof, Fraser; Crowley, Peter B. (2015). Structural study of a small molecule receptor bound to dimethyllysine in lysozyme. Chem. Sci. 6 (1), 442-449
Abstract
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 (sclx(4)) bound to methylated lysozyme in which the lysine residues were chemically modified from Lys-NH3+ to Lys-NH(Me-2)(+)Of the six possible dimethyllysine sites, sclx4 selected Lys116-Me-2 and the dimethylamino substituent was deeply buried in the calixarene cavity. This complex confirms the tendency for Lys-Me-2 residues to form cation-pi 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-Me-2 in solution. The structure presented here may serve as a stepping stone to the development of new biochemical reagents that target methylated lysines.
Funder
Publisher
Royal Society of Chemistry (RSC)
Publisher DOI
Rights
Attribution-NonCommercial-NoDerivs 3.0 Ireland
cbn
Collections
Externally hosted open access publications with University of Galway authors (2)