A biotin-binding protein with a low isoelectric point (pI) is potentially valuable.
We discovered novel biotin-binding proteins (lentiavidins) from Lentinula edodes.
The pI of lentiavidin 1 was 3.9; the lowest in the known biotin-binding proteins.
Lentiavidin 1 has potential broad applications as a novel biotin-binding protein.