|
Comparative modeling | |
3D-JIGSAW | www.bmm.icnet.uk/servers/3djigsaw/ |
CPH-Models | www.cbs.dtu.dk/services/CPHmodels/ |
COMPOSER | www-cryst.bioc.cam.ac.uk/ |
FAMS | physchem.pharm.kitasato-u.ac.jp/FAMS/fams.html |
MODELLER | guitar.rockefeller.edu/modeller/modeller.html |
PrISM | honiglab.cpmc.columbia.edu/ |
SWISS-MODEL | www.expasy.ch/swissmod/SWISS-MODEL.html |
SDSC1 | cl.sdsc.edu/hm.html |
WHAT IF | www.cmbi.kun.nl/bioinf/predictprotein/ |
ICM | www.molsoft.com/ |
SCWRL | www.fccc.edu/research/labs/dunbrack/scwrl/ |
InsightII | www.accelrys.com |
SYBYL | www.tripos.com |
Model evaluation | |
PROCHECK | www.biochem.ucl.ac.uk/~roman/procheck/procheck.html |
WHATCHECK | www.cmbi.kun.nl/swift/whatcheck/ |
ProsaII | www.came.sbg.ac.at |
BIOTECH | biotech.embl-ebi.ac.uk:8400/ |
VERIFY3D | www.doe-mbi.ucla.edu/Services/Verify_3D/ |
ERRAT | www.doe-mbi.ucla.edu/Services/Errat.html |
ANOLEA | guitar.rockefeller.edu/ fmelo/anolea/anolea.html |
AQUA | urchin.bmrb.wisc.edu/ jurgen/Aqua/server/ |
SQUID | www.yorvic.york.ac.uk/~oldfield/squid |
PROVE | www.ucmb.ulb.ac.be/UCMB/PROVE/ |
(Figure 3: continued from the previous page)
Structural overlap is defined as the fraction of equivalent atoms. For the comparison of the model with the actual structure (filled circles), two atoms were considered equivalent if they belonged to the same residue and were within 3.5Å of each other after least-squares superposition of all atoms by the ALIGN3D command in MODELLER. For comparison of the template structure with the actual target structure (open circles), two atoms were considered equivalent if they were within 3.5Å of each other after alignment and rigid-body superposition. At high sequence identities, the models are close to the templates and therefore also close to the experimental target structure (solid line, filled circles). At low sequence identities, errors in the target-template alignment become more frequent and the structural similarity of the model with the experimental target structure falls below the target-template structural similarity. The difference between the model and the actual target structure is a combination of the target-template differences (light area) and the alignment errors (dark area). The figure was constructed by calculating 3993 comparative models based on single templates of varying similarity to the targets. All targets had known (experimentally determined) structures and therefore the comparison of the models and templates with the experimental structures was possible [47]. The top part of the figure shows three models (solid line) compared with their corresponding experimental structures (dotted line). The models were calculated with MODELLER in a completely automated fashion before the experimental structures were available [43]. The arrows indicate the target-template similarity in each case.