ArticleJournal of chemical information and modeling2019
Cys.sqlite: A Structured-Information Approach to the Comprehensive Analysis of Cysteine Disulfide Bonds in the Protein Databank.
Article in Journal of chemical information and modeling, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed.
- Measurement of atomic scattering factors by cryoelectron microscopy.Proceedings of the National Academy of Sciences of the United States of America · 2026Article
- CysDBase: a comprehensive database of cysteine post-translational modifications across protein sequence, structure, microenvironment, class, cellular localization, biological pathway, and taxonomy.Database : the journal of biological databases and curation · 2026Article
- Structure and Oxidative Folding of AAI, the Major Alfa-Amylase Inhibitor From Amaranth Seeds.Frontiers in chemistry · 2020Review
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Authors and funding
3 authors.
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Abstract
Cysteine is a multifaceted amino acid that is central to the structure and function of many proteins. A disulfide bond formed between two cysteines restrains protein conformations through the strong covalent bond and torsions about the bond that prefer, energetically, ±90°. In this study, we transform over 30 000 Protein Databank files (PDBx/mmCIFs) into a single file, the SQLite database (Cys.sqlite). The database schema is designed to accommodate the structural information on both oxidized and reduced cysteines and to retain essential protein metadata to establish informational and biological provenance. Cys.sqlite contains over 95 000 peptide chains and 500 000 cysteines (700 000 structural conformers); there are over 265 000 cysteine disulfide bond conformations from structures solved with all available experimental methods. The structural information is analyzed with respect to sequence identity cutoff, the experimental method, and energetics of the disulfide. We find that as the experimental information becomes limiting and the influence of modeling becomes more pronounced, the observed average strain increases artificially. The database and analyses presented here can be used to improve the refinement of biological structures from experiments that are known to contain one or more disulfide bonds.
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