Closed

This sandbox puzzle features a monomer protein design by Bletchley Park from Puzzle 2106. This design forms an NTF2 fold, with an open pocket that could be repurposed to bind a small molecule.

This is a throwback puzzle to the early days of Foldit. This protein is involved in the process of exocytosis, transporting proteins to the cell membrane or extracellular areas. The protein is modeled here in reduced form, so no disulfides are expected to form. We are revisiting old Foldit puzzles so we can see how useful the recent additions to the game have been and to provide newer players with puzzles that are still scientifically relevant.

The structure of this protein has already been solved and published, but close inspection suggests that there are some problems with the published solution. We'd like to see if Foldit players can use the same electron density data to reconstruct a better model. In addition to the protein chain, puzzle includes a glutathione ligand that is fixed in place.

Design a symmetric protein tetramer, with 4 identical chains of 80 residues each! This puzzle enables AlphaFold predictions for the monomer subunit of your design, so you can upload your solution for AlphaFold using the AlphaFold prediction tool. AlphaFold will predict the structure of your monomer subunit only (i.e. in the unbound state, in the absence of other symmetric copies). If you load this prediction, then Foldit will attempt to align the prediction with your solution. If you continue working off of the AlphaFold prediction, you may need to make adjustments at the interface where the monomer subunit interacts with symmetric copies.

Note: This puzzle replaces Puzzle 2111 which mistakenly allowed parts of the target chain to move. Players may not load work from the original Puzzle 2111.

Note: This puzzle was closed early due to an error that allowed parts of the target chain to move. This puzzle has been reposted as Puzzle 2111b.

This is a throwback puzzle to the early days of Foldit. This toxin is produced in the intestines of the African black mamba. The protein contains ten cysteines that oxidize to form five disulfide bonds. We are revisiting old Foldit puzzles so we can see how useful the recent additions to the game have been and to provide newer players with puzzles that are still scientifically relevant.

Design a symmetric protein tetramer, with 4 identical chains of 60 residues each! This puzzle enables AlphaFold predictions for the monomer subunit of your design, so you can upload your solution for AlphaFold using the AlphaFold prediction tool. AlphaFold will predict the structure of your monomer subunit only (i.e. in the unbound state, in the absence of other symmetric copies). If you load this prediction, then Foldit will attempt to align the prediction with your solution. If you continue working off of the AlphaFold prediction, you may need to make adjustments at the interface where the monomer subunit interacts with symmetric copies.

The structure of this protein has already been solved and published, but close inspection suggests that there are some problems with the published solution. We'd like to see if Foldit players can use the same electron density data to reconstruct a better model. In addition to the protein chain, puzzle includes three sulfate ions that are fixed in place.

This is a throwback puzzle to the early days of Foldit. This protein is an allergen produced by the white birch tree. We are revisiting old Foldit puzzles so we can see how useful the recent additions to the game have been and to provide newer players with puzzles that are still scientifically relevant.