000131663 001__ 131663 000131663 005__ 20240219150720.0 000131663 0247_ $$2doi$$a10.1016/j.bpj.2010.05.034 000131663 0248_ $$2sideral$$a90550 000131663 037__ $$aART-2010-90550 000131663 041__ $$aeng 000131663 100__ $$aFaivre, Damien 000131663 245__ $$aDevelopment of cellular magnetic dipoles in magnetotactic bacteria 000131663 260__ $$c2010 000131663 5060_ $$aAccess copy available to the general public$$fUnrestricted 000131663 5203_ $$aMagnetotactic bacteria benefit from their ability to form cellular magnetic dipoles by assembling stable single-domain ferromagnetic particles in chains as a means to navigate along Earth's magnetic field lines on their way to favorable habitats. We studied the assembly of nanosized membrane-encapsulated magnetite particles (magnetosomes) by ferromagnetic resonance spectroscopy using Magnetospirillum gryphiswaldense cultured in a time-resolved experimental setting. The spectroscopic data show that 1), magnetic particle growth is not synchronized; 2), the increase in particle numbers is insufficient to build up cellular magnetic dipoles; and 3), dipoles of assembled magnetosome blocks occur when the first magnetite particles reach a stable single-domain state. These stable single-domain particles can act as magnetic docks to stabilize the remaining and/or newly nucleated superparamagnetic particles in their adjacencies. We postulate that docking is a key mechanism for building the functional cellular magnetic dipole, which in turn is required for magnetotaxis in bacteria. 000131663 540__ $$9info:eu-repo/semantics/openAccess$$aAll rights reserved$$uhttp://www.europeana.eu/rights/rr-f/ 000131663 590__ $$a4.218$$b2010 000131663 591__ $$aBIOPHYSICS$$b18 / 72 = 0.25$$c2010$$dQ1$$eT1 000131663 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion 000131663 700__ $$aFischer, Anna 000131663 700__ $$0(orcid)0000-0002-1827-1250$$aGarcia Rubio, Ines 000131663 700__ $$aMastrogiacomo, Giovanni 000131663 700__ $$aGehring, Andreas 000131663 773__ $$g99, 4 (2010), 1268-1273$$pBiophys. j.$$tBIOPHYSICAL JOURNAL$$x0006-3495 000131663 8564_ $$s1304180$$uhttps://zaguan.unizar.es/record/131663/files/texto_completo.pdf$$yVersión publicada 000131663 8564_ $$s3145003$$uhttps://zaguan.unizar.es/record/131663/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada 000131663 909CO $$ooai:zaguan.unizar.es:131663$$particulos$$pdriver 000131663 951__ $$a2024-02-19-13:22:42 000131663 980__ $$aARTICLE