Magnetotactic bacteria (MTB) align along the Earth's magnetic field using an organelle called the magnetosome. The magnetosome-associated protein MamP is conserved in all MTB and has a PDZ domain, a small c-type cytochrome domain (the first magnetochrome domain, MCR1), a 17-residue linker and a second magnetochrome domain (MCR2). This entry describes the two tandem magnetochrome domains carrying c-type cytochrome motifs CX2CH [1].

1: Structural insight into magnetochrome-mediated magnetite biomineralization. Siponen MI, Legrand P, Widdrat M, Jones SR, Zhang WJ, Chang MC, Faivre D, Arnoux P, Pignol D; Nature. 2013;502:681-684. PMID:24097349