Hypothetical protein; Plays a role in regulating magnetite crystal size; partially redundant function with MmsF.

Bacterial magnetic particle specificiron-binding protein; Plays a role in regulating magnetite crystal size. Belongs to the magnetosome MamG (TC 9.B.95) protein family.

Bacterial magnetic particle specific iron-binding protein; Promotes the formation of magnetite in Fe(2+)-rich conditions, when magnetite is not readily formed. Binds Fe(3+) and Fe(2+) (Probable). May play a role in nucleation of magnetite crystal formation (Probable). May help control production of crystals with a specific morphology (Probable). Greatly improves the formation of magnetosome-like magnetite crystals in vitro. Isolated short protein, probably residues 75-133, binds up to 18 Fe(3+) per monomer and self-assembles into micelles about 21-26 nm in diameter; the C-terminal 21 [...]

Trypsin-like serine protease, typically periplasmic; Acts at 2 distinct steps of magnetosome formation; required for correct localization of proteins to the magnetosome while the protease activity is required for maturation of small magnetite crystals into larger, functional ones. The 2 functions are separable by mutation. Probably cleaves at least itself, MamO and MamP; cleavage requires the putative transport domain of MamO (Probable). Involved in localization of some proteins (at least MamA, MamC, MamF, MamI and MamJ) to the magnetosome.

Predicted Co/Zn/Cd cation transporters; Plays a dual, essential role in magnetosome formation; required for magnetosome vesicle formation as well as biomineralization (Probable). Probably binds and transports iron (By similarity). Requires heterodimerization with MamM for stability (By similarity); Belongs to the cation diffusion facilitator (CDF) transporter (TC 2.A.4) family.

Hypothetical protein; Plays a major role in synthesis of cubooctahedral magnetite crystals by controlling crystal growth and morphology after nucleation. Has a partially redundant function with MamF (By similarity). When overexpressed in E.coli the soluble protein self assembles into shells of about 36 nm. This protein mediates the formation of magnetite nanoparticles from a solution of Fe(2+) and Fe(3+) sulfate; the crystals are larger and lack alternative iron oxide/oxyhydroxide species seen in the protein's absence.