puzzle picture
307: CASP9 Puzzle 5
Status: Closed


Name: 307: CASP9 Puzzle 5
Status: Closed
Created: 05/13/2010
Points: 100
Expired: 05/20/2010 - 23:00
Difficulty: Beginner
Description: Our fifth CASP9 target should be very familiar to you since the only template is the recently solved native structure from mini-CASP 15. The alignment seems perfect, so in order to beat everyone else who is using this same template at CASP you'll need to refine the loop regions. Don't waste too much time on the ends of the protein, you can see in the puzzle comments that the template has very floppy termini.

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beta_helix's picture
User offline. Last seen 11 hours 43 min ago. Offline
Joined: 05/09/2008
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The above video evolution is the native template for this puzzle

Just like Mini-CASP 17 (http://www.youtube.com/watch?v=j5JlXdnrQQs), the native for CASP9 Puzzle 5 is being solved using NMR.

The template we are using for CASP9 Puzzle 5 is 2kru (http://www.rcsb.org/pdb/explore/images.do?structureId=2KRU), which was the native you were trying to reach in Mini-CASP 15.

You can see in this youtube clip that 2kru's tails are floppy (just like Mini-CASP 17). This is often the case with NMR structures and when grading our predictions the CASP9 assessors will ignore these flopping regions.

We don't know exactly how much (if any) of the ends of CASP9 Puzzle 5 will be floppy and ungraded, so we are not trimming them in the puzzle. You should keep in mind, however, that it is very likely that the ends will not be solved and therefore will not be counted in the CASP9 assessments.

So don't waste too much time on the termini with this puzzle, focus on the short loops!

For once, the alignment should really be good from the start and you shouldn't have to move the starting alignment (threading should also be easier with this one), but feel free to experiment!

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