Fig. P1.

MamA complex localization and structure within magnetotactic bacteria. The Magnetospirilla are Gram-negative bacteria capable of forming specialized subcellular organelles called magnetosomes. These compartments are assembled from a chain of lipid invaginations that each enclose a nano-crystal of magnetic iron oxide (left). The linear chain of invaginations is coated by MamA protein homooligomers (middle). The structure of a MamA monomer comprises five TPR motifs and another N-terminal putative TPR motif (right).