Noteworthy Protein Knots

 Examples of knotted proteins.

circa 2007

  The 52 knot of Ubiquitin Hydrolase (1xd3):

              

Evolutionary origin of the 31 knot   1yh0  of X. campestris

Structures of Transcarbamylase from X. campestris with a trefoil knot and from Human without a knot

circa 2008

  The smallest knot: 31 in (2evf) with only 92 amino-acids

  

  The most complex knot: 61 in the dehalogenase (3bjx)

    

 Possible folding scenario