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Thireou T, Atlamazoglou V, Levakis M, Eliopoulos E, Hountas A, Tsoucaris G, Bethanis K. CrystTwiV: a webserver for automated phase extension and refinement in X-ray crystallography. Nucleic Acids Res 2007; 35:W718-22. [PMID: 17488848 PMCID: PMC1933117 DOI: 10.1093/nar/gkm225] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
An important stage in macromolecular crystallography is that of phase extension and refinement when initial phase estimates are available from isomorphous replacement or anomalous scattering or other methods. For this purpose, an alternative method called the twin variables (TwiV) method has been proposed. The algorithm is based on alternately transferring the phase information between the twin variable sets. The phase extension and refinement is evaluated with the crystallographic symmetry test by deliberately sacrificing the space-group symmetry in the starting set, then using its re-appearance as a criterion for correctness. Here we present a software program (CrysTwiV) that runs on the web (freely available at: http://btweb.aua.gr/crystwiv/) implementing the above-mentioned method.
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Affiliation(s)
- Trias Thireou
- Physics Lab, Department of Science, Department of Biotechnology, Agricultural University of Athens, 75 Iera Odos, Votanikos, Athens 118-55, Greece and Centre de recherche de restauration des musées de France, C2RMF-U.M.R. 171 du C.N.R.S., Palais du Louvre, 75001 Paris, France
| | - Vassilis Atlamazoglou
- Physics Lab, Department of Science, Department of Biotechnology, Agricultural University of Athens, 75 Iera Odos, Votanikos, Athens 118-55, Greece and Centre de recherche de restauration des musées de France, C2RMF-U.M.R. 171 du C.N.R.S., Palais du Louvre, 75001 Paris, France
| | - Manolis Levakis
- Physics Lab, Department of Science, Department of Biotechnology, Agricultural University of Athens, 75 Iera Odos, Votanikos, Athens 118-55, Greece and Centre de recherche de restauration des musées de France, C2RMF-U.M.R. 171 du C.N.R.S., Palais du Louvre, 75001 Paris, France
| | - Elias Eliopoulos
- Physics Lab, Department of Science, Department of Biotechnology, Agricultural University of Athens, 75 Iera Odos, Votanikos, Athens 118-55, Greece and Centre de recherche de restauration des musées de France, C2RMF-U.M.R. 171 du C.N.R.S., Palais du Louvre, 75001 Paris, France
| | - Athanassios Hountas
- Physics Lab, Department of Science, Department of Biotechnology, Agricultural University of Athens, 75 Iera Odos, Votanikos, Athens 118-55, Greece and Centre de recherche de restauration des musées de France, C2RMF-U.M.R. 171 du C.N.R.S., Palais du Louvre, 75001 Paris, France
| | - George Tsoucaris
- Physics Lab, Department of Science, Department of Biotechnology, Agricultural University of Athens, 75 Iera Odos, Votanikos, Athens 118-55, Greece and Centre de recherche de restauration des musées de France, C2RMF-U.M.R. 171 du C.N.R.S., Palais du Louvre, 75001 Paris, France
| | - Kostas Bethanis
- Physics Lab, Department of Science, Department of Biotechnology, Agricultural University of Athens, 75 Iera Odos, Votanikos, Athens 118-55, Greece and Centre de recherche de restauration des musées de France, C2RMF-U.M.R. 171 du C.N.R.S., Palais du Louvre, 75001 Paris, France
- *To whom correspondence should be addressed. +30 210 5294211+30 210 5294233
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