Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Biogeochemical fingerprinting of magnetotactic bacterial magnetite

Journal Article · · Proceedings of the National Academy of Sciences of the United States of America
Biominerals are important archives of the presence of life and environmental processes in the geological record. However, ascribing a clear biogenic nature to minerals with nanometer-sized dimensions has proven challenging. Identifying hallmark features of biologically controlled mineralization is particularly important for the case of magnetite crystals, resembling those produced by magnetotactic bacteria (MTB), which have been used as evidence of early prokaryotic life on Earth and in meteorites. In this work, we show that magnetite produced by MTB displays a clear coupled C–N signal that is absent in abiogenic and/or biomimetic (protein-mediated) nanometer-sized magnetite. We attribute the presence of this signal to intracrystalline organic components associated with proteins involved in magnetosome formation by MTB. These results demonstrate that we can assign a biogenic origin to nanometer-sized magnetite crystals, and potentially other biominerals of similar dimensions, using unique geochemical signatures directly measured at the nanoscale. This finding is significant for searching for the earliest presence of life in the Earth’s geological record and prokaryotic life on other planets.
Research Organization:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE Office of Science (SC)
Grant/Contract Number:
AC02-07CH11358
OSTI ID:
1881905
Report Number(s):
IS-J--10,862; EAR-1647012; EAR-150779; EAr-1423939; CGL-2013-46612; CGL-2016-76723
Journal Information:
Proceedings of the National Academy of Sciences of the United States of America, Journal Name: Proceedings of the National Academy of Sciences of the United States of America Journal Issue: 31 Vol. 119; ISSN 0027-8424
Publisher:
National Academy of SciencesCopyright Statement
Country of Publication:
United States
Language:
English

References (43)

Size control of in vitro synthesized magnetite crystals by the MamC protein of Magnetococcus marinus strain MC-1 journal January 2015
Elongated prismatic magnetite crystals in ALH84001 carbonate globules: journal December 2000
Magnetoliposomes of mixed biomimetic and inorganic magnetic nanoparticles as enhanced hyperthermia agents journal November 2019
The identification and biogeochemical interpretation of fossil magnetotactic bacteria journal January 2008
Understanding biomineralization in the fossil record journal April 2018
Greenalite and its role in the genesis of early Precambrian iron formations – A review journal June 2021
Origins of magnetite nanocrystals in Martian meteorite ALH84001 journal November 2009
Structure–function studies of the magnetite-biomineralizing magnetosome-associated protein MamC journal June 2016
Microstructure-specific carbon isotopic signatures of organic matter from ∼3.5 Ga cherts of the Pilbara Craton support a biologic origin journal April 2016
Modeling Image Distortions in 3DAP journal June 2004
A Gas-Phase Reaction Cell for Modern Atom Probe Systems journal February 2019
pH-Dependent Adsorption Release of Doxorubicin on MamC-Biomimetic Magnetite Nanoparticles journal November 2018
Nanoscale chemical tomography of buried organic–inorganic interfaces in the chiton tooth journal January 2011
Magnetosome biogenesis in magnetotactic bacteria journal September 2016
Challenges in evidencing the earliest traces of life journal August 2019
Control of magnetite nanocrystal morphology in magnetotactic bacteria by regulation of mms7 gene expression journal July 2016
Effects of organic polymer addition in magnetite synthesis on the crystalline structure journal January 2014
Truncated hexa-octahedral magnetite crystals in ALH84001: Presumptive biosignatures journal February 2001
Magnetotactic bacteria form magnetite from a phosphate-rich ferric hydroxide via nanometric ferric (oxyhydr)oxide intermediates journal August 2013
Chemical signature of magnetotactic bacteria journal January 2015
Potentially biogenic carbon preserved in a 4.1 billion-year-old zircon journal October 2015
SIMS analyses of the oldest known assemblage of microfossils document their taxon-correlated carbon isotope compositions journal December 2017
MMS6 Protein Regulates Crystal Morphology during Nano-sized Magnetite Biomineralization in Vivo journal December 2010
Morphology: An Ambiguous Indicator of Biogenicity journal August 2002
Biosignature Preservation and Detection in Mars Analog Environments journal April 2017
On Biomineralization book July 1989
Structural purity of magnetite nanoparticles in magnetotactic bacteria journal January 2011
Iron‐biomineralizing organelle in magnetotactic bacteria: function, synthesis and preservation in ancient rock samples journal June 2020
Identifying microbial life in rocks: Insights from population morphometry journal December 2019
Manganese in biogenic magnetite crystals from magnetotactic bacteria journal March 2009
Biomimetic mineral self-organization from silica-rich spring waters journal March 2017
Cellular remains in a ~3.42-billion-year-old subseafloor hydrothermal environment journal July 2021
Amorphous intergranular phases control the properties of rodent tooth enamel journal February 2015
Search for Past Life on Mars: Possible Relic Biogenic Activity in Martian Meteorite ALH84001 journal August 1996
Oxygen and Iron Isotope Studies of Magnetite Produced by Magnetotactic Bacteria journal September 1999
Mass-dependent and -independent signature of Fe isotopes in magnetotactic bacteria journal May 2016
Manganese incorporation into the magnetosome magnetite: magnetic signature of doping [Manganese incorporation into the magnetosome magnetite: magnetic signature of doping] journal September 2014
Biomagnetic Recovery and Bioaccumulation of Selenium Granules in Magnetotactic Bacteria journal July 2016
Comparative Subcellular Localization Analysis of Magnetosome Proteins Reveals a Unique Localization Behavior of Mms6 Protein onto Magnetite Crystals journal August 2016
Magnetofossils, the Magnetization of Sediments, and the Evolution of Magnetite Biomineralization journal May 1989
Evidence for exclusively inorganic formation of magnetite in Martian meteorite ALH84001 journal May 2004
Structure prediction of magnetosome-associated proteins journal January 2014
Magnetic foraminifera thrive in the Mariana Trench journal April 2022

Similar Records

Unravelling the diversity of magnetotactic bacteria through analysis of open genomic databases
Journal Article · Thu Jul 30 20:00:00 EDT 2020 · Scientific Data · OSTI ID:1816244

Magnetic microbes: Bacterial magnetite biomineralization
Journal Article · Sun Sep 13 20:00:00 EDT 2015 · Seminars in Cell and Developmental Biology · OSTI ID:1227437

Phylogenetic significance of composition and crystal morphology of magnetosome minerals
Journal Article · Mon Dec 31 19:00:00 EST 2012 · Frontiers in Microbiology · OSTI ID:1628100