This family consists of the NikC family of nickel ABC transporter permeases. Operons that contain this protein also contain a homologous permease subunit NikB. Nickel is used in cells as part of urease or certain hydrogenases or superoxide dismutases. [Transport and binding proteins, Cations and iron carrying compounds]
Jiyao W et al.(2023). "The conserved domain database in 2023.",