xVis: a web server for the schematic visualization and interpretation of crosslink-derived spatial restraints.
Bottom Line: The identification of crosslinks by mass spectrometry has recently been established as an integral part of the hybrid structural analysis of protein complexes and networks.The crosslinking analysis determines distance restraints between two covalently linked amino acids which are typically summarized in a table format that precludes the immediate and comprehensive interpretation of the topological data. xVis displays crosslinks in clear schematic representations in form of a circular, bar or network diagram.The interactive graphs indicate the linkage sites and identification scores, depict the spatial proximity of structurally and functionally annotated protein regions and the evolutionary conservation of amino acids and facilitate clustering of proteins into subcomplexes according to the crosslink density.
Affiliation: Gene Center and Department of Biochemistry, Ludwig-Maximilians-Universität München, Munich 81377, Germany.Show MeSH
Mentions: Topological analysis of the INO80 chromatin remodeler in complex with its nucleosome substrate. (A) Identification of subcomplexes and assignment to different structural modules using EM, chemical crosslinking and biochemical assays. (B) Crosslinked INO80 subunits are visualized and alphabetically sorted in a circular representation using xVis. The protein names are colored according to the modules in (A). (C) Hierarchical clustering of INO80 subunits based on crosslinks displayed in a circular diagram by xVis. (D) Hierarchical clustering of INO80 subunits based on crosslinks shown in a bar diagram by xVis. Bars represent InterPro domains (Figure 3A) (inter-protein crosslinks in black, intra-protein crosslinks in red).
Affiliation: Gene Center and Department of Biochemistry, Ludwig-Maximilians-Universität München, Munich 81377, Germany.