Artoria2e5 Lv 1
NCBI smartblast (sorry, I can't wait for blastp) returns the most similar match as https://www.ncbi.nlm.nih.gov/protein/AJA65759.1, something with an avidin domain. avidins are known to bind biotin very tightly!
Okay, the full blastp says this is one of the bradavidin II structures from https://pubmed.ncbi.nlm.nih.gov/23661323/, already published on PDB. The paper is free on PMC.