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URL: http://www.glycosciences.de/tools/carp/
Proper Citation: CARP (RRID:SCR_009021)
Description: Service that generates Ramachandran-like plots of carbohydrate linkage torsions in pdb-files. The Ramachandran Plot, where backbone torsion angles are plotted against each other, is a frequently used tool to evaluate the quality of a protein 3D structure. For carbohydrate structures, linkage torsions can be evaluated in a similar way. Preferred Phi/Psi values of the torsion angles of glycosidic bonds depend strongly on the types of monosaccharides involved in the linkage, the kind of linkage (1-3, 1-4, etc) as well as the degree of branching of the structure. CARP analyses carbohydrate data given in PDB files using the pdb2linucs algorithm. For each different linkage type a separate plot is generated. The user can choose between two sources for plot background information for comparison: data obtained from PDB provided by GlyTorsion or from GlycoMapsDB. GlycoMapsDB provides calculated conformational maps, which show energetically preferred regions for a specific linkage, while PDB data are based on experimentally solved structures. For seldom occuring linkages, however, PDB data are often rare, so maybe not sufficient background information for comparison will be available from this source.
Abbreviations: carp
Synonyms: CArbohydrate Ramachandran Plot, carp: CArbohydrate Ramachandran Plot
Resource Type: service resource, analysis service resource, production service resource, data analysis service
Defining Citation: PMID:15608187
Keywords: carbohydrate, 3d structure, protein, plot
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