Structure validation

• Name check.
• Checks the nomenclature of torsion angles.
  
  
  
• Coarse Packing Quality Control
• Checks the normality of the local environment of amino acids
  
  
  
• Anomalous bond lengths.
• Lists bond lengths that deviate more than 4 sigma from normal.
  
  
  
• Planarity.
• Checks if planar groups are planar enough.
  
  
  
• Highly likely peptide flips
• Checks if peptide flips of any type are needed
  
  
  
• Relaxed peptide flips
• Checks if peptide flips of any type are needed
  
  
  
• Fine Packing Quality Control
• Checks the normality of the local environment of amino acids
  
  
  
• Collisions with symmetry axes.
• Lists atoms that are too close to symmetry axes.
  
  
  
• Hand check.
• Lists atoms with a chirality that deviates more than 4 sigma from normal.
  
  
  
• Ramachandran plot evaluation.
• Determines the quality of a Ramachandran plot.
  
  
  
• Omega.
• Checks if the distribution of omega angles is normal.
  
  
  
• Proline puckering.
• Checks if proline pucker falls in a normal range.
  
  
  
• Anomalous bond angles.
• Lists bond angles that deviate more than 4 sigma from normal.
  
  
  
• Checking water and ion switches.
• Lists ions that might be waters (and vice versa), or other ions.