Format of the submission requires that 80 column long records are used Example 1. These may be spaces when needed see target template PDB files as provided in specific target descriptions available through the CASP13 target table. Coordinate section for each monomeric model, each homo-oligomeric model, or every new different sequence chain of hetero-multimeric model should begin with a single PARENT record and terminate with a TER record see above.
If a multimer's stoichiometry composition formula displays more than one equivalent unit, the PARENT record should be supplied within the first unit only. It is requested that coordinate data be supplied for at least all non-hydrogen main chain atoms, i. For assembly prediction Example 2 , coordinates for all chains should be submitted in one PDB-like file. Chains should be labeled 'A', 'B', The convention for chain order is: alphabetical, heteromeric units different sequences first.
For example, for a homotrimer of heterodimers please name chains in the following order: AB first hetero-dimer , CD second dimer , EF 3rd dimer.
Names of heteromeric targets will start with letter 'H', e. H, names of all other regular targets will start from letter 'T', e. Homo-multimeric predictions are encouraged for all other regular targets, if applicable. If subunits of heteromeric targets are additionally released as separate tertiary structure prediction targets, there will be no need to submit monomeric predictions in addition to multimeric: we will automatically extract coordinates of each first different chain from the assembly prediction and save it as a tertiary structure model for the corresponding subunit.
Information on the tentative oligomeric state of the protein the stoichiometry formula to the best of our knowledge at the time of target release , will be announced through the Target List page. Atoms for which a prediction has been made must contain a value between 0. In place of temperature factor field, the error estimates, in Angstroms, should be provided. We require all predictors to submit the error estimates as these will be used in the evaluation.
Models with all residues having the same 'B-factor' will be rejected. The prediction should start with the sequence of the predicted target splitted if necessary in several rows see Example 3. In CASP, a pair of residues is defined to be in contact when the distance between their C-beta atoms C-alpha in case of glycine is less then 8 Angstroms.
These parameters are currently dumb and left in the format only for the consistency with previous CASPs. Values larger than 0. In binary two-class evaluations, the probability value of 0. Contacts in the prediction should be listed according to the decreasing probability p. If several contacts are assigned the same probability, for the evaluation purposes they will be considered in the order provided in the prediction. A2, B44 see Example 3B. In QA category, predictors are requested to use model index '1' for predictions submitted in the first stage i.
Timeline example. May 4, noon - the deadline for submitting tertiary structure predictions by servers. May 8, noon - deadline for "stage 1" QA predictions. The second set of server TS predictions models selected to test both, single-model and clustering methods is sent to the registered QA servers and posted on the casp13 archive page. May 10, noon - deadline for "stage 2" QA predictions. All server TS predictions are posted on the casp13 archive page.
No further QA predictions from servers or manual groups are accepted for this target. The first line of data should specify mode identifier, i. In both modes, the first column in each line contains model identifier file name of the accepted 3D prediction. The second column contains the accuracy score for a model as a whole MQS. Customizable exam taking mode.
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