Part of an ABC transporter complex involved in molybdenum import. The complex is composed of two ATP-binding proteins, two transmembrane proteins (HVO_B0370) and a solute-binding protein (HVO_B0369). Predicted to be exported by the Tat system. The position of the signal peptide cleavage has not been experimentally proven. Belongs to the bacterial solute-binding protein 1 family. WtpA subfamily.