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Definition

niche 3
A motif of 3 consecutive residues with dihedral angles as follows:
   residue (i-1): no limitations on φ/ψ
   residue   (i):  -120° < φ < -60°    -50° < ψ < 30°
   residue (i+1):  -100° < φ < -50°    110° < ψ < 170°
Comments
This version of the database contains motifs with the amended definition. The criteria used was that the distance between i-1 and the i+1 Oxygen atoms must be within 4.5 Å, both C-O vectors must look towards each other and the residues must not fall into the helical region.
 
structural motifs:
  alpha-beta-motif     asx-motif     asx-turn-iil  
  asx-turn-iir     asx-turn-il     asx-turn-ir  
  beta-bulge     beta-bulge-loop-5     beta-bulge-loop-6  
  beta-turn-iil     beta-turn-iir     beta-turn-il  
  beta-turn-ir     gamma-turn-classic     gamma-turn-inverse  
  nest-lr     nest-rl     niche-3l  
  niche-3r     niche-4l     niche-4r  
  schellmann-loop-6     schellmann-loop-7     st-motif  
  st-staple     st-turn-iil     st-turn-iir  
  st-turn-il     st-turn-ir  

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