Backbone only search returns no hit.

[WrViajero]

Hello, I am having a naive question for Foldseek search. It is noticed in the paper that only alpha carbon relations will be extracted and be used to predict 3Di tokens. In this way, I manually curate a backbone only dataset with only N, alpha-C, and C atoms and construct corresponding PDBs from this dataset and later on run Foldseek search.

However, the results always say no hits are found.

I am not sure what has actually happened. Any help from you will be highly appreciated.