Biomineralisation

Biomineralisation is the process by which living organisms orchestrate the deposition of inorganic minerals within or upon organic matrices, yielding composites with finely tuned mechanical, optical or magnetic properties. From magnetotactic bacteria that fabricate chains of magnetite nanoparticles to guide their orientation, through the calcified exoskeletons of molluscs and the siliceous frustules of diatoms, to the calcium phosphate–reinforced collagen of vertebrate bone, organisms exert precise control over nucleation, growth and hierarchical assembly. Mineral type and shape are governed by specialised proteins, polysaccharides and lipids that concentrate ions, stabilise amorphous precursors and template crystal surfaces. This molecular choreography underpins global biogeochemical cycles, contributes to sediment formation, modulates environmental carbon levels and inspires bioinspired materials. In medicine, understanding bone and tooth mineralisation informs strategies for regenerative therapies and implant design, while the ability of bacteria to precipitate or dissolve minerals is harnessed for bioremediation and resource recovery. Such processes exemplify how biological systems have adapted mineral physics and chemistry to create functional structures under ambient conditions.

Research from Nature Portfolio

Investigation of magnetosome assembly in magnetotactic bacteria has revealed that MamF‐like proteins are distant homologues of plastid translocon components. These proteins act as integral scaffolds in the bacterial protein‐targeting system, directing the spatial recruitment of magnetosome factors and ensuring correct membrane invagination and magnetite crystallisation. In reef‐building corals inhabiting volcanic CO₂ seeps, comparative genomics and transcriptomics have identified adaptive alleles across host, symbiont and microbiome compartments that enhance acid–base regulation and symbiont productivity, suggesting natural reservoirs of resilience to ocean acidification. Cores from long‐lived Porites and Diploastrea have shown that both genera systematically up‐regulate calcifying‐fluid pH and dissolved inorganic carbon to maintain high aragonite saturation. Porites responds dynamically to temperature by increasing fluid saturation to boost calcification, whereas Diploastrea maintains homeostatic saturation across gradients, highlighting genus-specific strategies for coping with thermal and acidification stress.

Research from all publishers

A recent interdisciplinary review has extended biomineralisation concepts to materials science, emphasising how polymeric process‐directing agents mimic non‐collagenous proteins to form amorphous precursors that crosslink into inorganic–organic scaffolds for hard‐tissue repair and beyond. Advanced 3D cryo‐FIB‐SEM imaging of chick embryo femora has quantified intracellular vesicular transport of calcium‐rich precursors, revealing that active osteoblastic networks convey vesicles at speeds incompatible with diffusion alone and that a hierarchical series of vascular, cellular and diffusive pathways underpins mineral logistics. In ageing murine osteoblasts, decline in alkaline phosphatase activity, phosphate transporters and collagen‐I expression, linked to altered WNT and TGFβ signalling, correlates with reduced trabecular density; this work clarifies how age-related changes in matrix enzymes and ion transporters impair bone mineralisation.

Biomineralisation publication trend

The graph below shows the total number of articles in biomineralisation across all publications each year (not limited to Nature Index journals).

Technical terms

Biomineralisation: The biologically controlled process by which organisms deposit crystalline or amorphous minerals within an organic framework.

Magnetosome: A membrane‐bound organelle in magnetotactic bacteria containing magnetite or greigite crystals arranged into chains for geomagnetic orientation.

Calcifying fluid: The extracellular microenvironment beneath coral tissue where pH and dissolved‐inorganic‐carbon are actively regulated to induce aragonite precipitation.

Bioapatite: A non‐stoichiometric, carbonate‐substituted form of hydroxyapatite that constitutes the mineral phase of bone and tooth enamel.

Polymer‐induced liquid‐precursor (PILP): A biomimetic technique using acidic polymers to stabilise amorphous calcium phosphate droplets that infiltrate collagen matrices before crystallisation.

References

1. MamF-like proteins are distant Tic20 homologs involved in organelle assembly in bacteria. Nature Communications (2024).
2. Genomic signatures suggesting adaptation to ocean acidification in a coral holobiont from volcanic CO2 seeps. Communications Biology (2023).
3. Differences in carbonate chemistry up-regulation of long-lived reef-building corals. Scientific Reports (2023).
4. Expanding from materials to biology inspired by biomineralization. Interdisciplinary Materials (2024).
5. Logistics of Bone Mineralization in the Chick Embryo Studied by 3D Cryo FIB‐SEM Imaging. Advanced Science (2023).
6. Age-related decline in bone mineral transport and bone matrix proteins in osteoblasts from stromal stem cells. American Journal of Physiology - Cell Physiology (2023).