Molybdate transport

In both bacteria and archaea, molybdate is transported by an ABC-type trans porter comprising three proteins, ModA (periplasmic binding protein), ModB (membrane protein) and ModC, the ATPase. The modABC operon expression is co ntrolled by ModE-Mo. In the absence of the high-affinity molybdate transpor ter, molybdate is also transported by another ABC transporter which transpo rts sulfate/thiosulfate as well as by a nonspecific anion transporter. Comp arative analysis of the molybdate transport proteins in various bacteria an d archaea is the focus of this review. (C) 2001 Editions scientifiques et m edicales Elsevier SAS.