TCDB is operated by the Saier Lab Bioinformatics Group

FezAB iron transport system where FezA is a membrane protein with 131 aas and 1 N-terminal TMS, and FezB is an ATPase of the P-type ATPase family with highest similarity in TCDB to the protein with TC# 3.A.3.32.1 (53% identity) (Pi et al. 2023). FezB has 699 aas and may have as many as 10 TMSs.  However, all member of TC family 3.A.3.32 are predicted to have fewer than 10 TMSs.  The function identified for this protein indicates that all members of subfamily 3.A.3.32 may transport iron, probably in the ferric iron valency.

FezAB of Clostridioides difficile