A novel protein tightly bound to bacterial magnetic particles in Magnetospirillum magneticum strain AMB-1.

摘要: Magnetic bacteria synthesize magnetite crystals with species-dependent morphologies. The molecular mechanisms that control nano-sized crystal formation and the generation of diverse morphologies are not well understood. From analysis crystal-associated proteins, several low mass proteins tightly bound to bacterial were obtained from Magnetospirillum magneticumstrain AMB-1. These showed common features in their amino acid sequences, which contain hydrophobic N-terminal hydrophilic C-terminal regions. regions Mms5, Mms6, Mms7, Mms13 dense carboxyl hydroxyl groups bind iron ions. Nano-sized magnetic particles similar those prepared by chemical synthesis presence acidic protein Mms6. may be directly involved biological bacteria.