Proteins in this entry belong to the Formate-Nitrite Transporter (FNT) family and includes the nitrite transport protein NirC and formate channel FocA [1,2]. They have a pentameric architecture with structural similarity to aquaporins and glyceroporins [1]. Proteins in this family transport the structurally related compounds, formate and nitrite.

1: Identification and characterization of a bacterial hydrosulphide ion channel. Czyzewski BK, Wang DN; Nature. 2012;483:494-497. PMID:22407320