Foldit Puzzles

1280: Unsolved De-novo Freestyle 85

The structure of this protein is still unknown. Secondary structure predictions (from PSIPRED) are marked on the starting structure, and provide clues about where the protein might form helices and sheets!

1279: 85 Residue Monomer Design: Helical Bundles

This is a basic 85 residue design puzzle with no secondary structure filter—helical bundles welcome! The Ideal Loops Filter is meant to encourage the use of the Ideal Loops that are displayed in the Rama Map. See the puzzle comments for filter details. The Baker Lab will run folding predictions on your solutions for this puzzle, and those that perform well will be synthesized in the lab. Remember, you can use the Upload for Scientists button for up to 5 designs that you want us to look at, even if they are not the best-scoring solutions!

1278: Revisiting Puzzle 69: Scorpion Toxin

This is a throwback puzzle to the early days of Foldit. This is another potent neurotoxin produced by scorpions, similar to that found in Puzzle 55. This protein contains eight cysteine residues that oxidize to form four disulfide bonds. We are revisiting old Foldit puzzles so we can see how useful the recent additions to the game have been.

1277: Unsolved De-novo Freestyle 83: NMR Constraints

This is a follow-up puzzle for Puzzle 1268, now with NMR torsion constraints! We have some experimental data from NMR spectroscopy that tells us about some structural propensities of this protein, but we don’t have a way to turn that data into a structure. Here we've included some of these data as torsional constraints, which constrain the backbone φ- and ψ-torsions of each residue. The constraints are reflected in the Backbone subscore; look for residues with with a bad Backbone score to find areas that need improvement! Some of the torsion constraints are suggestive of α-helices and β-sheets, which have been included in the starting structure for your convenience. Players will be able to load in manual saves from Puzzle 1268 and use them as a starting point here.

1276: Revisiting Puzzle 68: Bos Taurus

This is a throwback puzzle to the early days of Foldit. This cow protein, found in epithelial cells of the intestine, binds calcium as it moves from the digestive tract into the blood. We are revisiting old Foldit puzzles so we can see how useful the recent additions to the game have been.

1275: 65 Residue Monomer Design: Helical Bundles

This is a basic 65 residue design puzzle with no secondary structure filter—helical bundles welcome! The Ideal Loops Filter is meant to encourage the use of the Ideal Loops that are displayed in the Rama Map. See the puzzle comments for filter details. The Baker Lab will run folding predictions on your solutions for this puzzle, and those that perform well will be synthesized in the lab. Remember, you can use the Upload for Scientists button for up to 5 designs that you want us to look at, even if they are not the best-scoring solutions!

1274: Electron Density Reconstruction 1: Round 2

This is a followup to Puzzle 1249, with a new density map derived from a Foldit player solution. The solution seems to fit the data, but needs some refinement! Players may load in solutions from Puzzle 1249.

1273: Revisiting Puzzle 67: Integrase

This is a throwback puzzle to the early days of Foldit. This DNA-binding domain is part of a bacterial integrase protein, which facilitates the insertion of new DNA into the bacterial chromosome. We are revisiting old Foldit puzzles so we can see how useful the recent additions to the game have been.

1272: 80 Residue Monomer Design: More Sheets!

This puzzle challenges players to design proteins with more sheets! Designs should include at least 50% residues in sheet conformation. The Ideal Loops Filter is meant to encourage the use of the Ideal Loops that are displayed in the Rama Map. See the puzzle comments for filter details. The Baker Lab will run folding predictions on your solutions for this puzzle, and those that perform well will be synthesized in the lab. Remember, you can use the Upload for Scientists button for up to 5 designs that you want us to look at, even if they are not the best-scoring solutions!

1271: Unsolved De-novo Freestyle 84

The structure of this protein is still unknown. Secondary structure predictions (from PSIPRED) are marked on the starting structure, and provide clues about where the protein might form helices and sheets!