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2276: SARS-CoV-2 Nsp3 CACHE Challenge 3: Round 5

Closed since almost 3 years ago

Intermediate Overall Small Molecule Design

Summary


Created
March 09, 2023
Expires
Max points
100
Description

Compete in a challenge to design a drug targeting the SARS-CoV-2 Nsp3 macrodomain. Use the small molecule design tools and the compound library panel to find library compounds which bind to the active site of the enzyme. -- Only compounds which come from the Compound Library panel and get the Compound Library objective bonus will be experimentally tested.

Note: To get the most out of the small molecule design tools, we recommend changing you view settings to the Small Molecule Design Preset.

Round 5 is anticipated to be the last for this series. We've increased the flexibility of protein by allowing sidechains within the pocket to be movable. We don't anticipate much change of these sidechains, though, as most of the crystallized structures have similar sidechain conformations.

Participation in CACHE puzzles is subject to the CACHE Terms of Participation, in particular “the Challenge IP [including Challenge Compounds] will be made freely available in the public domain pursuant to Creative Commons Attribution Only (CC-BY 4.0 or subsequent versions) licensing terms, with the intent that such Challenge IP may be Used and practiced by Users for any purpose”.

Top groups


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  3. Avatar for Anthropic Dreams 3. Anthropic Dreams 52 pts. 27,444
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  6. Avatar for Gargleblasters 6. Gargleblasters 16 pts. 25,525
  7. Avatar for FamilyBarmettler 7. FamilyBarmettler 10 pts. 25,416
  8. Avatar for Australia 8. Australia 6 pts. 25,268
  9. Avatar for AlphaFold 9. AlphaFold 4 pts. 24,658
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  3. Avatar for maithra 3. maithra Lv 1 29 pts. 28,087
  4. Avatar for guineapig 4. guineapig Lv 1 14 pts. 28,038
  5. Avatar for Bruno Kestemont 5. Bruno Kestemont Lv 1 6 pts. 27,907
  6. Avatar for Galaxie 6. Galaxie Lv 1 2 pts. 27,444
  7. Avatar for LociOiling 7. LociOiling Lv 1 1 pt. 27,417
  8. Avatar for alcor29 8. alcor29 Lv 1 1 pt. 27,300
  9. Avatar for Sandrix72 9. Sandrix72 Lv 1 1 pt. 26,919
  10. Avatar for phi16 10. phi16 Lv 1 1 pt. 26,818

Comments


rmoretti Staff Lv 1

Objectives

Objectives in this puzzle are driven primarily by the evaluation criteria used by CACHE.

Maximum bonus: +11 000

Compound Library (max +2000)
Gives a bonus if your current compound is in the library. This uses a local cached version of the Compound Library search results to determine if the compound is in the library. If you manually create a compound that happens to be in the library (or if you load a shared solution with an on-library compound), you may need to submit the compound to the compound library search and wait to get the results back before the objective can properly recognize that the compound is in the library. (If the objective is not updating, try wiggling the structure. See this forum post for more discussion.)

Acid groups (max +1000)
Certain groups like carboxylate and phosphate would make compounds not ideal for drug usage. This gives a bonus if the compound is missing these problematic groups. (Show highlights regions of the molecule at issue.)

Torsion Quality (max +1000)
Keeps bond rotations in a good range. Using Wiggle or Tweak Ligand can fix bad torsions. (Show highlights torsions to be rotated.)

Torsion Quality (max +1000)
Keeps bond rotations in a good range. Using Wiggle or Tweak Ligand can fix bad torsions. (Show highlights torsions to be rotated.)

Number of Rotatable Bonds (max +1000)
Intended to keep the ligand from getting too big and floppy. You can reduce rotatable bonds by deleting groups or forming rings. (Show highlights rotatable bonds.)

Ligand TPSA (max +1000)
Topological Polar Surface Area - Keeps the polar surface area (including buried polar surface) low. To improve, try removing oxygens and nitrogens. (Show highlights atoms contributing to higher TPSA.)

Ligand cLogP (max +1000)
A measure of polarity - Keeps the molecule from getting too hydrophobic. To improve, try adding polar oxygens and nitrogens. (Show highlights atoms contributing to higher cLogP.)

Fraction of four-bonded carbons (max +1000)
Measures how carbons with bonds to four atoms ("sp3 hybridized") there are. Too few (too many double and triple bonded carbons) is bad. (Show highlights carbon atoms at issue.)

Bad Groups (max +1000)
Gives a bonus for avoiding groups that interfere with assays, or which are far from the compounds in the library. (Show highlights groups at issue.)

Molecular Weight (max +1000)
Keeps the ligand a reasonable size.

Synthetic Accessibility (max +1000)
Keeps the ligand from going too far from the compounds in the library. (Show highlights parts of the molecule at issue.)