Software to find similarity of two molecules

In summary, the conversation is about comparing two files with atomic coordinates for the same structure generated by different programs. The speaker is looking for a software or method to compare the structures, but encounters difficulties due to the different output formats of the programs. They suggest using a well-known chemistry program that can export atomic positions in a standardized way to facilitate comparison. The other person suggests using InChIs, a canonical representation of the molecule, to compare the structures.
  • #1
Trave11er
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I have two files with atomic coordinates for the same generated strucutre (cycle made of eight sulphur atoms), but produced by two different progams (so that output files have different coordinates supposedly connected by translation/rotation). Is there some kind of software to compare the two structures generated.
 
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  • #2
If you don't need to do that xxxx times, and if there is no software for that, this still looks manageable with a bit of manual help (identify corresponding atoms, then calculate translation and rotation based on three of them).
 
  • #3
Unfortunately it doesn't work because one program outputs coordinates in order 1, 2, 3...8 while the other does 1, 3, 5, 7, 2, 4, 6, 8. Isn't there some well-known chemistry program that allows to export atomic positions from the structure drawn, so that I could do sth like insert coordinates from program 1, then standardize and export new positions. Repeat for program 2 and compare?
 
  • #4
Trave11er said:
Unfortunately it doesn't work because one program outputs coordinates in order 1, 2, 3...8 while the other does 1, 3, 5, 7, 2, 4, 6, 8.
If you know that order already, it is easy to fix that.

Isn't there some well-known chemistry program that allows to export atomic positions from the structure drawn, so that I could do sth like insert coordinates from program 1, then standardize and export new positions. Repeat for program 2 and compare?
I don't know, that's why I looked for alternative solutions.
 
  • #5
Basically you are looking for a canonical representation of the molecule. Try to find a tool that will generate IhChI for both molecules, these are guaranteed to be canonical and unique - so if the molecules are identical, InChIs will be identical as well.
 
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1. How does software for finding similarity of two molecules work?

The software works by comparing the structural and chemical properties of two molecules and calculating a similarity score based on these factors. It uses algorithms and databases to analyze the molecules and determine their similarity.

2. What types of molecules can be compared using this software?

This software can compare a wide range of molecules, including small organic compounds, peptides, proteins, and nucleic acids. It can also be used to compare molecules with different sizes and complexities.

3. Can this software be used to identify potential drug candidates?

Yes, this software can be used to identify molecules that have a high similarity to known drugs, which can help in the drug discovery process. It can also be used to identify molecules that have similar properties to a specific target molecule.

4. How accurate is the similarity score generated by this software?

The accuracy of the similarity score depends on the quality of the input data and the algorithm used by the software. Generally, the score is considered to be accurate if it is above a certain threshold, which can be adjusted by the user.

5. What are the advantages of using software to find similarity of two molecules?

Using software to find similarity of two molecules can save time and resources compared to traditional methods of comparing molecules. It can also provide more accurate and reliable results, and can be used to compare a large number of molecules simultaneously.

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